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AN
AMERICAN NATIONAL STANDARD
ages and Gaging for
Metric M Screw Threads
ANSI/ASME 81.16M~1984
(REVISION OF ANSI B 1.16-1972)
SPONSORED AND PUBLISHED BY
THE
AMERICAN
SOCIETY
United Engineering Center
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MECHANICAL
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ENGINEERS
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Date of l~suance: April 30, 1985
This Standard will be revised when the Society approves the issuance of a new edition.
There will be no addenda or written interpretations of the requirements of this Standard
issued to this Edition.
·
This code or standard was developed under procedures accredited as meeting the criteria for
American National Standards. The Consensus Committee that approved the code or standard was
balanced to assure that individuals from competent and concerned interests have had an oppor·
tunity to participate. The proposed code or standard was made available for public review and
comment which provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large.
ASME does not "approve," "rate," or "endorse" any item, construction, proprietary device, or
activity.
ASME does not take any position with respect to the validity of any patent rights asserted in
connection with any items mentioned in this document, and does not undertake to insure anyone
utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume
any such liability. Users of a code or standard are expressly advised that determination of the
validity of any such patent rights, and the risk of ·infringement of such rights, is entirely their own
responsibility.
Participation by federal agency representative(s) or person(s) affiliated with industry is not to
be interpreted as government or industry endorsement of this code or standard.
ASME accepts responsibility for only those interpretations issued in accordance with governing
ASME procedures and policies which preclude the issuance of interpretations by individual val·
unteers.
No part of this document may be reproduced In any form,
in an electronic retrieval system or otherwise,
without the prior written permission of the publisher.
Copyright © 1985 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All Rights Reserved
Printed In U.S.A.
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FOREWORD
(This Foreword is not part of ANSI/ ASME B1.16M-1984.)
The first issue of ANSI B 1.16 was approved and formally designated as an American
National Standard on April 28, 1972. It was developed by Subcommittee 2 of the B I
Committee to serve as the American practice regarding the specifications and dimensions
for gages applied to metric screw threads. As in the first issue, this Edition of ANSI
B 1.16M follows the American practice for the design and tolerances for gages of this type,
except for the truncations of the HI/ LO elements, which are more in line with the
truncations specified in ISO 1502.
This new publication, designated ANSI/ ASME B 1.16M-I984, has had considerable
new material added to cover the many options of gages and measuring equipment shown
in ANSI B !.3M, Screw Thread Gaging Systems for Dimensional Acceptability. It has also
retained HI and LO functional gages but has eliminated gages with pitch diameter outside
product thread limits. It also includes tabulated values for the specifications of gage
elements for the standard series of metric M screw thread sizes listed in ANSI BI.I3M,
Metric Screw Threads - M Profile.
ANSI/ ASME B 1.16M was approved by the ASME Standards Committee B I on
April 27, 1984. The proposed Standard was submitted by the ASME Board of Standardization to the American National Standards Institute. It was approved and formally
designated an American National Standard on May 25, 1984.
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ASME STANDARDS COMMITTEE 81
Standardization and Unification of Screw Threads
(The following is the roster of the Committee at the time of approval of this Standard.)
OFFICERS
D. J. Emanuelli, Chairman
H. W. Ellison, Vice Chairman
C. E. Lynch, Secretary
COMMITIEE PERSONNEL
AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC.
G. G. Gerber. McDonnell Douglas, St. Louis, Missouri
H. Borrmon, Alternate. Sperry Gyroscope Division, Great Neck, New York
AMERICAN IRON AND STEEL INSTITUTE
F. Dallas. Jr.. Sawhill Tubular Division, Sharon, Pennsylvania
JI,MERICAN MEASURING TOOL MANUFACTURERS ASSOCIATION
D. Dodge, Pennoyer-Dodge Co., Glendale, California
C. W. Jatho. Alternate. American Measuring Tool Manufacturers Association, Birmingham. Michigan
AMERICAN PIPE FITIINGS ASSOCIATION
W. C. Farrell. Stockham Valves and Fittings, Birmingham, Alabama
DEFENSE INDUSTRIAL SUPPLY CENTER
E. Schwartz. Defense Industrial Supply Center, Philadelphia, Pennsylvania
F. S. Ciccarone. Alternate, Defense Industrial Supply Center, Philadelphia, Pennsylvania
ENGINE MANUFACTURERS ASSOCIATION
G. A. Russ, Cummins Engine Co., Columbus, Indiana
!'ARM AND INDUSTRIAL EQUIPMENT INSTITUTE
J. IF. NlfiliJy, Ford Motor Co., Dearborn. Michigan
INDUSTRIAL FASTENERS INSTITUTE
R. B. Belford. Industrial Fasteners Institute, Cleveland, Ohio
R. M. Hcrria, Bethlehem Steel Co.• lebanon. Pennsylvania
K. E. McCullough. SPS Technologies, Inc., Jenkintown, Pennsylvania
J. C. McMurray. Russell, Burdsall and Ward Inc .. Mentor, Ohio
J. A; Trilling. Holo-Krome Co .• West Hartford, Connecticut
E. D. Spengler, Alternate, Bethlehem Steel Co., Lebanon, Pennsylvania
MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITriNG INDUSTRY
W. C. Ferrall, Stoclcham Valves and Fittings, Birmingham, Alabama
METAL CUTIING TOOL INSTITUTE (TAP & DIE DIVISION)
N. F. Nlllu, Union/Butterfield. Athol, Massachusetts
A. D. Shepherd. Jr., Alternate, Union/Butterfield, Derby Line, Vermont
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NATIONAL AUTOMATIC SPRINKLER AND FIRE CONTROL ASSOCIATION, INCORPORATED
W. Testa, Grinnell Fire Protection Systems Co., Inc., Providence, Rhode Island
R. P. Fleming, Alternate, National Automatic Sprinkler and Fire Control Association, Inc., Patterson,
New York
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION
J. l. Griffin, Wheatland Tube Co., Wheatland, Pennsylvania
J. B. Levy, General Electric Co., Schenectady, New York
F. F. Weingruber, Westinghouse Electric Corp., Pittsburgh, Pennsylvania
W. R. Williford, Alternate, National Electrical Manufacturers ·Association, Washington, D.C.
NATIONAL MACHINE TOOL BUILDERS ASSOCIATION
R. J. Sabatos, The Cleveland Twist Drill Co., Cleveland, Ohio
D. R. Stoner, Jr .• Teledyne Landis Machine, Waynesboro, Pennsylvania
NATIONAL SCREW MACHINE PRODUCTS ASSOCIATION
T. S. Meyer, Fischer Special Manufacturing Co., Cold Spring, Kentucky
H. A. Eichstaedt, Alternate, National Screw Machine Products Association, Brecksville, Ohio
SOCIETY OF AUTOMOTIVE ENGINEERS
li. W. Ellison, General Motors Technical Center, Warren. Michigan
SOCIETY OF MANUFACTURING ENGINEERS
M. Davidson, Morse/Hemco Corp., Holland, Michigan
TUBULAR RIVET AND MACHINE INSTITUTE
R. fill. Byrne, Industry Service Bureaus, Inc., White Plains, New York
U.S. DEPARTMENT OF THE AIR FORCE
R. P. Stewart, Wright-Patterson Air Force Base, Ohio
U.S. DEPARTMENT OF THE ARMY
F. J. Clas, U.S. Department of the Army, Watervliet, New York
J. Crowley, U.S. Army Material Development and Readiness Command, Alexandria, Virginia
F. L. Jones, .Alternate, U.S. Army Missile Command, Redstone Arsenal, Alabama
U.S. DEPARTMENT OF DEFENSE
E. Schwartz, Defense Industrial Supply Center, Philadelphia, Pennsylvania
U.S. DEPARTMENT OF THE NAVY
C. T. Gustafson, Portsmouth Naval Shipyard, Portsmouth, New Hampshire
INDIVIDUAL MEMBERS
C. T. Appleton, Jefferson, Massachusetts
J. Boehnlein, PMC Industries. Wickliffe, Ohio
W. E. Bour, Santa Monica, California
A. R. Breed, Mechanical Fasteners and Assembly, Lakewood, Ohio
R. Browning, Southern Gage Co., Erin, Tennessee
A. Butovich, Air Industries Corp., Garden Grove, California
R. S. Charmerda, The Johnson Gage Co., Bloomfield, Connecticut
J. F. Cramer, Des Moines. Washington
J. F. Dickson, Reed Rolled Thread Die Co., Holden, Massachusetts
R. B. Donohue, Xerox Corporation, Webster, New York
E. W. Drescher, Lancaster, Pennsylvania
D. J. Emanuelli, Greenfield Tap and Die, Greenfield, Massachusetts
C. G. Erickson,. Colt Industries - Sterling Die Operation, West Hartford, Connecticut
S. I. Kanter. The Hanson-Whitney Co., Hartford. Connecticut
R. W. Lamport, The Van l<euren Co., Watertown, Massachusetts
A. R. Machell, Jr., Xerox Corp., Rochester, New York
A. E. Masterson, Watervliet, New York
R. E. Mazzara, Geometric Tool, New Haven, Connecticut
1i. G. Muenchinger, Westerly, Rhode Island
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P. V. Pastora, Regal Beloit Corp., South Beloit, Illinois
M. M. Schuster, Hi-Shear Corp., Torrance, California
A. G. Strang, Boyds, Maryland
L. R. Strang. Caterpillar Tractor Co., Peoria, Illinois
A. F. Thibodeau. Swanson Tool Manufacturing, Inc., West Hartford, Connecticut
J. W. Turton, The Bendix Corp., Greenfield, Massachusetts
SUBCOMMITTEE 81.2 -
SCREW THREAD GAGES AND GAGING
R. Browning. Chairman Southern Gage Co., Erin, Tennessee
C. G. Erickson, Secretary, West Hartford, Connecticut
C. T. Appleton, Jefferson, Massachusetts
P. f. Bitters. Greenfield Tap and Die, Greenfield, Massachusetts
P. C. Burne, Amerace·Esna Corp., Union, New Jersey
R. S. Chamerda, The Johnson Gage Co., Bloomfield, Connecticut
P. Clark, Boeing Aerospace Co., Seattle, Washington
D. Dodge, Pennoyer-Dodge Co., Glendale, California
H. W. Ellison, General Motors Technical Center, Warren, Michigan
J. J. Fiscalia, Latham, New York
G. Garcina, General Motors Corp., Indianapolis, Indiana
C. T. Gustafson, Metrology Laboratories Division, Portsmouth, New Hampshire
S. I. Kanter, The Hanson-Whitney Co., Hartford, Connecticut
A. E. Masterson, Watervliet, New York
W. l. Mau, The National Rolled Thread Die Co., Walton Hills, Ohio
K. E. McCullough, SPS Technologies, Inc., Jenkintown, Pennsylvania
J. C. McMurray, Russell, Burdsall and Ward, Inc., Mentor, Ohio
A. A. Audmann, NASA Goddard Space Flight Center, Bowie, Maryland
M. M .. Schuster, Hi-Shear Corp., Torrance, California
A. G. Strang, Boyds, Maryland
J. V'J. Turton. The Bendix Corp., Greenfield, Massachusetts
A. Zaveruha, McMellon Brothers, Stratford, Connecticut
TASK GROUP 81.16- GAGES AND GAGING FOR METRIC
M SCREW THREADS
C. G. Ericltson, Chairman, West Hartford, Connecticut
A. Browning, Secretary, Southern Gage Co., Erin, Tennessee
C. T. Appleton, Jefferson, Massachusetts
R. S. Chamerda, The Johnson Gage Co., Bloomfield, Connecticut
M. Davidoon, Morse/Hemco Corp .• Holland, Michigan
D. J. Emanuelli, Greenfield Tap and Die, Greenfield, Massachusetts
S. I. Kanter, The Hanson-Whitney Co., Hartford, Connecticut
A. W. Lamport, The Van ICeuren Co., Watertown, Massachusetts
K. E. McCullough. SPS Technologies, Inc., Jenkintown, Pennsylvania
J. C. McMurray, Russell, Burdsall and Ward, Inc., Mentor, Ohio
E. Schworiz, Defense Industrial Supply Center, Philadelphia, Pennsylvania
A. G. Strang, Boyds, Maryland
vii
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CONTENTS
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standards Cornmittee Roster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
111
Introduction .................................................................... · · ·
1.1
References ................................................................... ·
1.2
Units of Measure ............................................................. .
1.3
Classification ................................................................ .
1.4
Federal Government Use .......................................... ·........... .
I
I
1
I
l
1
2
Basic Principles ................................................................... .
Accuracy in Gaging .......................................................... .
Limitations of Gaging ....................................................... .
Determining Size of Gages ................................................... .
Standard Temperature .........................................................
2.5
Rounding Procedure for Converting Metric Gage Values to Inch Gage
2.1
2.2
2.3
2.4
Values
3
4
............ · · · · · ·. · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
General Practice ................................................................ · · ·
3.1
General Design ............................................ ~ .................. .
3.2
Types of Gages .............................................................. .
3.3
Interpretation of Tolerances .................................................. .
3.4
Direction of Tolerances on Gages ............................................ .
3.5
Standard Thread Gage Tolerances ............................................ .
3.6
Tolerance on Lead ................................................ , .......... .
3.7
Tolerances on Half-Angle .................................................... .
3.8
Check of Effect of Lead and Flank Angle Variations on Product Thread ...... .
3.9
Calibration Requirements and Standards ..................................... .
Types of Gages for Product Internal Thread ..................................... .
4.1
GO Working Thread Plug Gages ............................................. .
4.2
HI Thread Plug Gages ....................................................... .
4.3
Thread Snap Gages - GO Segments or Rolls ............................... ..
4.4
Thread Snap Gages - HI Segments or Rolls ................................. .
4.5
Thread Snap Gages - Minimum Material: Pitch Diameter Cone and Vee ..... .
4.6
Thread Snap Gages - Minimum Material: Thread Groove Diameter Type .... .
4.7
Thread-Setting Solid Ring Gages ............................ : . ............... .
4.8
Plain Plug, Snap, and Indicating Gages to Check Minor Diameter of
Internal Thread ........................................................... .
4.9
Snap and Indicating Gages to Check Major Diameter of Internal Thread ...... .
4.10 Functional Indicating Thread Gages for Internal Thread ...................... .
4.11 Minimum-Material Indicating Thread Gages for Internal Thread .............. :
4.12 Indicating Runout Thread Gage for Internal Thread ......................... ..
4.13 Differential Gaging ........................................................ · · ·
v
I
10
10
IO
10
11
11
11
11
11
ll
II
12
12
12
12
12
14
17
17
21
24
25
25
29
29
34
34
38
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4.14 Pitch Micrometers ........................................................... .
4.15 .Thread-Measuring Balls ...................................................... .
4.16 Optical Comparator and Toolmaker's Microscope ............................ .
4.17 Profile Tracing Instrument ................................................... .
4.18 Surface Roughness Equipment ............................................... .
4.19 Roundness Equipment ....................................................... .
4.20 Miscellaneous Gages and Gaging Equipment ................................ , .
Types of Gages for Product External Thread .................................... .
5.1
GO Working Thread Ring Gages ............................................. .
5.2
LO Thread Ring Gages ...................................................... .
5.3
Thread Snap Gages - GO Segments or Rolls ................................ .
5.4
Thread Snap Gages - LO Segments or Rolls ................................ .
Thread Snap Gages - Cone and Vee ........................................ .
5.5
Thread Snap Gages - Minimum Material: Thread Groove Diameter Type .... .
5.6
5.7
Plain Ring and Snap Gages to Check Major Diameter of Product
External Threads .......................................................... .
5.8
Snap Gages for Minor Diameter of Product - External Threads ............. .
5.9
Functional Indicating Thread Gages for External Thread ..................... .
5.10 Minimum-Material Indicating Thread Gages for External Thread ............. .
5.11 Indicating Runout Gage for External Threads ................................ .
5.12 Differential Gaging ........................................ ·................ ; ..
5.13 W Tolerance Thread-Setting Plug Gages ..................................... .
5.14 Plain Check .Plug Gages for Thread Ring Gages .............................. .
5.15 Indicating Plain Diameter Gages - Major Diameter of Product
External Threads .......................................................... .
5.16 Indicating Gages to Check Minor Diameter of External Thread ............... .
5. I 7 Thread Micrometers ......................................................... .
5. I 8 Thread-Measuring Wires ............................... ; ..................... .
5.19 Optical Comparator and Toolmaker's Microscope ............................ .
5.20 Profile Tracing Instrument ................................................... .
5.21
Electromechanical Lead Tester ................................................ .
5.22 Helical Path Attachment Used With GO Type Thread Indicating Gage ........ .
5.23 Helical Path Analyzer ....................................................... .
5.24 Surface Roughness Equipment ............................................... .
5.25 Roundness Equipment ....................................................... .
5.26 Miscellaneous Gages and Gaging Equipment ................................. .
Figures
I Maximum-Material GO Functional Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Partial End Threads and Chip Grooves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 HI Functional Diameter Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Thread Snap Gages - Maximum-Material GO Functional Limit . . . . . . . . . . . . . . . . . . . .
5 Thread Snap Gages - HI Functional Diameter Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Thread Snap Gages- Minimum-Material Pitch Diameter Limit- Cone and Vee . . .
7 Thread Snap Gages- Minimum-Material Thread Groove Diameter Limit . . . . . . . . . . .
8 Thread Form of Solid Thread-Setting Ring Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Minor Diameter Limit- Cylindrical Plug Gages .. .. . .. . .. . . . . .. . .. . .. .. . . .. . . . . . . . .
10 Indicating Plain Diameter Gages- Max.-Min. Minor Diameter
Limit and Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II Snap and Indicating Diameter Gages- Max.-Min. Major Diameter
Lhnit and Size ........................................... , . . . . . . . . . . . . . . . . . . . . . . .
40
40
40
41
41
41
41
41
41
75
76
78
78
80
80
80
84
84
88
88
91
94
94
95
95
95
95
106
106
106
106
107
107
107
B
14
16
20
22
23
24
27
28
30
31
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12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Indicating Thread Gages- Maximum-Material GO Functional
Limit and Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicating Thread Gages- Minimum-Material Pitch Diameter Limit
and Size- Cone and Vee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicating Thread Gages- Minimum-Material Pitch Diameter Limit
and Size - Ball and Radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicating Thread Gages- Diameter Runout- Minor to Pitch ................. ·-·.
Indicating Thread Gages- Differential Gaging .·....................................
Inside Micrometer, Caliper Type .. . . .. .. . . .. . .. . .. .. . .. . .. . .. .. .. . .. .. .. . . .. .. .. . .. .
Maximum-Material GO Functional Limit . . .. .. . .. . .. . . .. .. . . . . . .. .. . .. . . . .. .. . .. .. .
LO Functional Diameter Limit . .. .. . . . . .. .. .. . . .. . . . .. . .. . .. .. .. .. .. . . . . .. .. . .. . . . ..
Thread Snap Gages- Maximum-Material GO Functional Limit . . . . . . . . . . . . . . . . . . . .
Thread Snap Gages- LO Functional Diameter Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thread Snap Gages- Minimum-Material Pitch Diameter Limit- Cone and Vee . . .
Thread Snap Gages- Minimum-Material Thread Groove Diameter Limit . . . . . . . . . . .
Major Dian1eter Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minor Diameter Limit Snap Type . . .. . . .. .. . .. . . . .. .. . .. .. .. .. . .. .. . .. .. . .. .. .. .. .. .
Indicating Thread Gages- Maximum-Material GO Functional Diameter Limit
and Size ................................................ , . , , ............... , . . . . .
Indicating Thread Gages - Minimum-Material Pitch Diameter Limit
and Size - Cone and Vee .... , ............................................. , .. , . .
Indicating Thread Gages- Minimum-Material Thread Groove Diameter
Limit and Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicating Thread Gages- Diameter Runout- Major to Pitch . . . . . . . . . . . . . . . . . . . . .
Indicating Thread Gages- Differential Gaging . .. .. . .. .. . . .. . . . .. .. . . .. . . . .. .. .. . . .
Thread Form of Truncated Thread-Setting Plug Gages ........ t................... . . .
Thread Form of Full-Form Thread-Setting Plug Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicating Plain Diameter Gage- Max.-Min. Major Diameter Limit and Size . . . . . . .
Indicating Diameter Gages- Max.- Min. Minor Diameter Limit and Size ...... , . . . . .
Indicating Gages- Helical Path Attachment Used With GO Type
Indicating Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
35
36
37
39
40
42
76
77
79
81
82
82
83
85
86
87
89
90
92
93
96
97
106
"I!"abies
I
2
3
4
5
6
7
8
9·
10
II
Screw Thread Gages and Measuring Equipment for External Product
Thread Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Screw Thread Gages and Measuring Equipment for Internal Product Thread
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Widths for Chip Grooves . . . .. .. . .. . . .. .. . . .. . . . . .. . .. .. . . .. .. . .. . . ..
Specifications and Format for Tables 10 and 12- Limits of Size of
Threaded and Plain Gages for Metric M External and Internal Threads . . . . . . . . . . . .
Specifications and Format for Tables II and 13 - Limits of Size of ThreadSetting Gages for Metric M Thread Working Gages .. . .. .. .. . . .. .. .. .. . . . . .. .. . .. .
X Gage Tolerances for Thread Gages................................................
W Gage Tolerances for Thread Gages................................................
Gage Tolerances for Plain Cylindrical Gages .. .. .. .. .. .. .. .. .. .. . .. .. .. . .. .. .. . . . .. ..
Constants for Computing Thread Gage Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gages for Standard Thread Series, Classes 6g and 6H M Profile Screw
Threads - Limits of Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Gates for Standard Thread Series, Classes 6g and 6H
M Profile Screw Threads - Limits of Size . .. .. .. . .. . .. .. .. . .. . .. .. .. .. .. .. .. .. . .. . ..
2
6
14
15
18
19
26
29
33
43
51
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12
13
14
15
16
Gages for Standard Thread Series, Classes 4g6g and 6H M Profile
Screw Threads - Limits of Size ....................................... ; . . . . . . . . . .
Setting Gages for Standard Thread Series, Classes 4g6g and 6H
M Profile -- Limits of Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .
Calibration Requirements and Standards for X Tolerance Thread Gages,
Indicating Gages, Plain Gages, and Measuring Equipment for
External Product Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration Requirements and Standards for X Tolerance Thread Gages,
Indicating Gages, Plain Gages, and Measuring Equipment for
Internal Product Threads .......... ~..............................................
Calibration Requirements for Thread- and Plain-Setting Gages . . . . . . . . . . . . . . . . . . . . . . .
58
66
98
102
105
Appendices
A Calibration and Inspection of Limit Gages, Snap Gages, Indicating Gages,
and Measuring Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AI
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A2
Thread Plug Gage Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AJ
Thread Ring Gage Inspection . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . .
A4
Plain Plug Gage Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AS
Plain Ring Gage Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6
Plain Snap Gages ....................................................... ·.....
A7
Rolls With Zero Lead Thread Form Used on Snap and
Indicating Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A8
Inspecting Peripheral Contacting Segments on Indicating Gages . . . . . . . . . . . . . . . .
A9
Inspection of Threaded Contact Segments Used on Internal
Product Thread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A 10 Check for Magnification Discrepancies Due to Indicating System Linkage . . . . . .
A II Calibration of Dial and Electronic [ndicators ........................... :. . . . . .
A 12 Assessment of Surface Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
115
115
115
115
B
Metrology of 60 deg. Screw Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BI
Wire Method of Measurement of Pitch Diameter (Thread Groove
Diameter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B2
Size of Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B3
Methods of Measuring Wires Considering the Effect of Deformation . . . . . . . . . . .
B4
Methods of Measurement Using Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B5
Standard Specification for Wires and Standard Practice in Measurement
of Wires of 60 deg. Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B6
General Formula for Measurement of Pitch Diameter . . . . . . . . . . . . . . . . . . . . . . . . . .
87
Simplified Formula for Pitch Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B8
Setting Measuring Instruments With Variable Measuring Force . . . . . . . . . . . . . . . .
89
Thread Balls ................................................. , . . . . . . . . . . . . . . . .
B I 0 Internal Pitch Diameter Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
117
C
Metric Tables for Gage lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
125
D
Customary Equivalents
127
Figure
B I A Three-Wire Method of Measuring Pitch (Thread Groove)
Diameter of Thread Plug Gages .. . . . .. . . . .. . . . . . . .. . . . . . . . . . . . .. . .. . . . . .. . . . . . . . .
109
109
109
110
112
113
113
113
113
117
117
117
120
120
121
121
122
122
122
118
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Tables
Minimum Magnification ......................................................... .
AI
60 dcg. Included Thread Angle ................................................... .
A2
Metric Thread· Measuring Wires for 60 deg. Screw Threads .. , .................... .
BI
Measuring Force for Over· Wire Measurements of External Pitch Diameter
B2
and Wire Calibration, and Cylindrical Diameter for Wire Calibration ................ .
Measuring Force Over Balls for Internal Pitch Diameter
B3
Measurement and Ball Calibration ............................................. .
Lengths of Taperlock and Trilock Thread Plug Gage Blanks (SI)
Cl
Selected From ANSI/ ASME B47.1aM ......................................... .
Lengths of Thread Ring Gage Blanks and Total Thread Lengths of
C2
Standard Truncated Setting Plug Gage Blanks (SI) Selected From
ANSI/ASME B47.IaM ........................................................ .
01
X Gage Tolerances for Thread Gages ............................................. .
W Gage Tolerances for Thread Gages ............................................ .
02
Gage Tolerances for Plain Cylindrical Gages ...................................... .
03
04
Metric Thread· Measuring Wires for 60 deg. Screw Threads ....................... .
Gages for Standard Thread Series, Classes 6g and 6H M Profile
05
Screw Threads-- limits of Size (Customary) ..................................... .
06
Setting Gages for Standard Thread Series Classes 6g and 6H M Profile
Screw Threads - Limits of Size (Customary) ..................................... .
Gages for Standard Thread Series Classes 4g6g and 6H M Profile
07
Screw Threads - Limits of Size (Customary) ..................................... .
08
Setting Gages for Standard Thread Series Classes 4g6g and 6H M Profile
Screw Threads- Limits of Size (Customary) .................................... .
09
Lengths of Taperlock and Trilock Thread Plug Gage Blanks Selected
From ANSI/ ASME B47.1aM (Customary) ...................................... .
010 Lengths of Thread Ring Gage Blanks and Total Thread Lengths of
Standard Truncated Setting Plug Gage Blanks Selected From ANSI/ ASME
B47 .laM (Customary) .................................................... .
--···-.,·.· ..... ·.····.-·.··,··· ... ·--Copyrighl ASME lnlornallonal
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110
Ill
119
119
122
125
126
128
129
130
130
131
139
147
155
163
164
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ANSI/ASME B 1.16M-1984
AN AMERICAN NATIONAL STANDARD
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR METRIC M SCREW THREADS
1 INTRODUCTION
This Standard provides essential specifications and
dimensions for the gages used on M series metric
screw threads, and covers the specifications and
dimensions for the thread gages and measuring
equipment listed in Tables I and 2. The basic purpose
and use of each gage are also described_
For easy reference, customary conversion of metric
tables has been incorporated as part of Appendix D.
Appendices A through D contain useful nonmandatory information that is supplementary to the
required Sections of this Standard.
1 . 1 References
The latest editions of the following documents
form a part of this Standard to the extent specified
herein.
American National Standards
ANSI B 1.2·
Gages and Gaging for Unified Inch Screw Threa9s
ANSI BUM
Screw Thread Gaging Systems for Dimensional
Acceptability
ANSI Bl.7
Nomenclature,
Definitions, and Letter Symbols
for Screw Threads
ANSI BI.13M
Metric Screw Threads M Profile
ANSI B46.l
Surface Texture
ANSI/ ASME B47.1aM Gage Blanks (Metric
Translation of ANSI
B47.1)
ANSI 889.1.6
Measurement of Qualified Plain Internal Diameters for Use as Master
Rings and Ring Gages
ANSI 889.1.9
Precision
Inch
Gage
· Blocks for Length Measurement
(Thru
20
Inches)
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ANSI 889.3_1
International Standard
ISO 1502-1978
Measurement of Out-ofRoundness
General Purpose Metric
Screw Threads - Gaging
1.2 Units of Measure
All dimensions in this Standard, including tables,
are expressed in millimeters (mm) unless otherwise
specified.
1.3 Classification
In this Standard, the terms HI and LO are used to
identify functional diameter thread gages, as per the
practice of the previous 81.16 Standard. The terms
apply to gages identified as NOT GO or minimum
material (M/ Mt), as described by their respective
standards.
1.4 Federal Government Use
When this Standard is approved by the Department of Defense and federal agencies and is incorporated into FED-STD-H28/22, Screw Thread Standard for Federal Services, Section 22, the use of this
Standard by the federal government will be subject to
all requirements and limitations of FED-STD-H28/
22.
2 BASIC PA INCIPLES
2.1 Accuracy in Gaging
Thread plug gages are controlled by direct measuring methods. Thread ring gages, thread snap limit
gages, and indicating thread gages are controlled by
reference to the appropriate setting gages or direct
measuring methods or both.
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ANSI/ASME 81.16M-1984
AN AMERICAN NATIONAL STANDARD
-
GAGES AND GAGING FOR
METRIC M SCREW THREADS
lADlE 1 SCREW THRIEAD GAGES AND MEASURING EQUIPMENT FOR
!EXTERNAL PRODUCT HIREAD CHARACTERISTICS
... - - - - - - - · · - - · · · - - - - - - - - - - · - - -
Metric M
Maximum
Material
GO
Thread Gages
and
Measuring Equipment
1 Threaded Rings (ANSI/ASME B47.1aM):
1.1 GO
Minimum Material
LO
Functional
Diameter
Pitch Diam.
Thd. Groove
Dlam.
Func.
Limit
Fun c.
Size
Fun c.
Limit
Fun c.
Size
Limit
Size
Limit
Size
A,
A,
B,
B,
C,
c,
D,
D,
0
1--
•
1.2 LO
2 Thread Snap Gages
2.1 GO segments
•
..
2.2 LO segments
•
2.3 GO rolls
•
2.4 LO rolls
3
2.5 Minimum material -
pitch diameter type - cone and vee
2.6 Minimum material type - cone only
thread groove diameter
0
0
Plain Diameter Gages
3.1 Plain cylindrical rings for major diameter
3.2 Major diameter snap type
3.3 Minor diameter snap type
3.4 Maximum and minimum major diameter snap type
3.5 Maximum and minimum minor diameter snap type
4
Indicating Thread Gages
Having either two contacts at 180 deg. or three contacts
at 120 deg.
4.1 GO segments
4.3 GO rolls
--·
4.5 Minimum material 4.6 Minimum material -cone only
0
0
pitch diameter type -cone and vee
thread groove diameter type
•
..
0
0
..
..
0
•
..
2
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•
GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
TAIIJILE 1 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR
EXTERNAL PRODUCT THREAD CHARACTERISTICS (CONT'D)
Metric M
Roundness of
Pitch Cylinder
Oval
109 deg.
Mulcilobe
120 deg.
Taper
of Pitch
Cylinder
Limit
Si:!:e
Limit
Sill:e
limit
Si:z:e
lead
Incl.
Helix
Variation
E,
IE,
F,
F,
G,
G,
H
Major
Diameter
Minor
Diameter
Flank
Angle
Variation
Limit
Si:z:e
limit
Size
I
J1
J,
K,
K,
Root
Rad.
Diam.
Runout
Major
to Pitch
Surface
Texture
L
M
N
(Note 1)
(Note 1)
"
.
"
(Note 1)
"
"
.,
a
Q
..
•
•
•
0
•
•
"
..
fjl
"
..
"
"
"
"
"'
•
(Note 1)
..
(Note 1)
0
•
..
<ll
..
"
"
0
3
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC.M SCREW THREADS
1 ABLE 1 SCREW TliRIEAD GAGES AND MEASURING EQUIPMENT FOR
!EXTERNAL PRODUCT THREAD CHARACTERISTICS (CONT'D)
Metric M
Maximum
Material
Minimum Material
GO
Thread Gages
and
Measuring Equipment
LO
Functional
Diameter
Pitch Diam.
Thd. Groove
Diam.
Fun c.
limit
Fun c.
Size
Fun c.
Limit
Fun c.
Size
Limit
Size
Limit
Size
A,
A,
B,
o,
C,
c,
D,
D,
..
•
•
G
4.7 Major diameter and pitch diameter runout gage
-5
4.8 Differential segment or roll
(GO profile for one pitch in length) used in combination
with a GO indicating gage to yield a diameter equivalent
for variation in lead (including uniformity of helix), and a
minimum-material indicating gage to yield a diameter
equivalent for variation in flank angle.
Indicating Plain Diameter Gages
5.1 Major diameter type
5.2 Minor diameter type
------
6
7
Pitch Micrometer With Standard Contacts (Approximately LO
Profile) Cone and Vee
•
Pitch Micrometer With Modified Contacts (Approximately
Pitch Diameter Contact) Cone and Vee
B Thread-Measuring Wires With Suitable Measuring Means
.
I
9 Optical Comparator and Toolmaker's Microscope With Suitable Fixturing
0
Profile Tracing Equipment With Suitable Fixturing
1
Lead Measuring Machine With Suitable Fixturing
2
Helical Path Attachment Used With GO Type Indicating Gage
3
Helical Path Analyzer
4
Plain Micrometer and Calipers -
5
Surface Measuring Equipment
..
•
Modified As Required
1 G Roundness Equipment
···.-·-··.·
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
TADil..E 1 SCREW Ttl READ GAGES AND MEASURING EQUIPMENT FOR
EXTERNAL PRODUCT THREAD CHARACTERISTICS (CONT'D)
Metric M
Roundne55 of
!"itch Cylinder
Onl
100 des.
Mullilobe
120 deg.
Taper
of Pil«:h
Cylindll!r
Lead
Ind.
Major
Diameter
limit
§ize
Limit
Size
Limia
Sb:e
V;,riation
Flank
Angle
Variaftion
E, .
E,
IF,
F,
c,
G,
H
I
Helix
e
0
8
0
Ct
•
•
Limit
Size
Limit
'Size
Rad.
Dlam.
Runout
Major
to Pitch
"
J,
K,
K,
L
M
Root
$
9
0
•
G
e
0
0
•
0
..
6
(I
0
G
0
(II
Surface
Texture
N
•
0
0
- -1 - -
Minor
Diameter
•
•
•
•
•
0
•
•
•
0
0
0
Cl
0
til
Ill
•
G
•
--- -·-- r--1!1
;
0
•
0
NOTh
(1) Ma\<imum minor diameter limit is acceptable when product passes GO gage.
5
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
TABLE 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR
INTERNAl PRODUCT THREAD CHARACTERISTICS
Metric M
MaKimum
Material
GO
Thread Gages
and
Measuring Equipment
1 Threaded Plugs (Af\151/ ASME B47.1aM):
1.1 co
Pitch Diam.
Thd. Groove
Diam.
Fun c.
Limit
Func.
Size
Func.
Limit
Func.
Size
Limit
Size
Limit
Size
A,
A,
8,
B,
c,
c,
D,
D,
•
1.2 HI
0
--
··-
2 Thread Snap Gages
2.1 CO segments
•
2.2 HI segments
"
•
2.3 CO rolls
•
2.4 HI rolls
2.5 Minimum material and vee
Minimum Material
til
Functional
Diameter
pitch diameter type - cone
•
2.6 Minimum material - thread groove diameter type
-cone only
•
3 Plain Diameter Gages
3:1 Plain cylindrical plugs for minor diameter
3.2 Major diameter snap type
3.3 Minor diameter snap type
3.4 Maximum and minimum major diameter snap type
3.5 Maximum and minimum minor diameter snap type
4
Indicating Thread Gages
Having either two contacts at 180 deg. or three
contacts at 120 deg.
4.1 CO segments
0
GO rolls
"
"
0
•
•
•
.
•
6
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-
GAGES t~ND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
TABU 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR
INTERNAL PRODUCT THREAD CHARACTERISTICS
Metric M
Roundness of
Pitch Cylinder
Oval
1110 deg.
Mullilobe
120 deg.
Taper
of Pitc:h
Cylinder
Limit
Size
Limit
Size
Limit
Size
Lead
Ind.
Helix
Variation
El
E,
Fl
F,
G,
G,
H
Flank
Angle
Variation
I
Major
Diameter
Minor
Diameter
Limit
Size
Limit
Size
J,
K,
K,
,,
Root
Rad.
Diam.
Runout
Minor
to Pitch
Surface
Texture
L
M
N
(Note 1)
u
(Note 1)
..
{I
(Note 1)
"
e
--
·-~-
· - · · - -1-----
..
..
---
--··
0
0
8
•
•
.
•
•
---·- -·•
..
"
0
0
.
..
(Note 1)·
.
(Note 1)
7
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ANSI/ ASME B 1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
TABLE 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR
INTERNAL PRODUCT THREAD CHARACTERISTICS (CONT'D)
---
Metric M
!----·------ ----.·-···
Thread Gages
and
Measuring Equipment
~-5 Minimum material -
Maximum
Material
HI
GO
Functional
Diameter
Minimum Material
Pitch Diam.
Thd. Groove
Diam.
Fun c.
limit
Fun c.
Size
Func.
Limit
Func,
Size
Limit
Size
Limit
Size
A;
A,
B,
B,
c,
c,
D,
D,
•
0
•
•
•
0
pitch diameter type- cone
and vee
~-6 Minimum material - thread groove diameter
' type - cone only
·,
1.7 Minor diameter and pitch diameter runout gage
ii.B Differential segment or roll
(GO profile for one pitch in length) used in combination
with a GO indicating gage to yield a diameter equivalent lor
variation in lead (including uniformity of helix), and a
minimum-material indicating gage to yield a diameter equivalent for variation in flank angle
5 Indicating Plain Diameter Gages
5.1 Major diameter type
5.2 Minor diameter type
6
7
Pitch Micrometer With Standard Contacts (Approximately HI
Profile) Cone and Vee
Pitch Micrometer With Modified Contacts (Approximately
Pitch Diameter Contact) Cone and Vee
"
•
•
0
8 Thread-Measuring Balls With Suitable Measuring Means
9
10
Optical Comparator and Toolmaker's Microscope With Suitable Fixturing and Cast Replica
"
0
Profile Tracing Equipment With Suitable Fixturing
14 Surface Measuring Equipment
15
Roundness Equipment
·-
8
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME 81.1 6M-1984
AN AMERICAN NATIONAL STANDARD
TABU 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR
INTERNAL PRODUCT THREAD CHARACTERISTICS (CONT'D)
Metric M
Roundness of
ll'itch Cylinder
Oval
100 deg.
Mullilobe
120 deg.
Taper
of Pitch
Cylinder
! Sixe
Limit
Size
Limit
Size
Lead
Ind.
Helix
Variation
E,
IE,
1',
F,
G,
G,
H
0
9
13
<2
0
•
0
0
9
0
0
0
I
l.imi~
I
Major
Diameter
Minor
Diameter
Flank
Angle
Variation
Limit
Size
limit
Size
I
J,
J,
K,
K,
Rad.
Diam.
Runout
Minor
to Pitch
Surface
Texture
L
M
N
Root
e
<il
9
Ill
G
G
•
•
•
•
.......:....._
•
•
e
•
a
•
@
'!>
111
'"
..
.,
"
•
0
..
..
•
•
•
•
•
•
•
"
1!1
0
0
NOTE:
(1) Minimum major diameter limit is acceptable when product passes GO gage.
9
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
2.2 !.imitations of Gaging
2.4 Standard Temperature
2.2.1 Product threads accepted by a gage of one
type may he verified by other types. It is possible,
however, that parts which are near a limit may be
accepted by one type and rejected by another. Also, it
is possible for two individual limit gages of the same
type to be at opposite extremes of the gage tolerances
permitted, and borderline product threads accepted
by one gage could be rejected by another. For these
reasons, a product screw thread is considered accepta~
ble when it passes a test by any of the permissible
gages in ANSI B 1.3M for the gaging system specified,
provided the gages being used are within the tolerances specified in this Standard.
2.4.1 A temperature of 20°C (68°F) is the standard temperature used internationally for linear
measurements. Nominal dimensions of gages and
product as specified and actual dimensions as measured shall be within specified limits at this temperature. For screw thread gaging, the acceptable tolerance on the standard temperature is ±I°C (±2°F).
2.4.2 As product threads are frequently checked
at temperatures which are not controlled, it is
desirable that the coefficient of the thermal expansion of gages be the same as that of the product on
which they are used. Inasmuch as the majority of
threaded product consists of iron or steel, and screw
thread gages are ordinarily made of hardened steel,
this condition is usually fulfilled without special
attention, provided thread gages and product have
stabilized to the same temperature. When the materials of the product thread and the gage are dissimilar, the differing thermal coefficients can cause
serious complications and must be taken into
account, unless both product and gage at the time of
gaging are at a temperature of:
(a) 20°C ±2°C (68°F ±4°F) for25 mmand smaller;
(b) 20°C ±I oc (68°F ±2°F) for sizes above 25 mm
to 75 mm;
(c) 20°C ±0.5°C (68°F ±I °F) for sizes above 75
mm to 150 mm.
2.2.2 Gaging large product external and internal
threads equal to or greater than 160 mm nominal size
with plain and threaded plug and ring gages presents
problems for technical and economic reasons. In
these instances, verification may be based on use of
modified snap or indicating gages or measurement of
thread elements. Various types of gages or measuring
devices in addition to those defined in this Standard
are available and acceptable when properly correlated to this Standard. The producer and user should
agree on the method and equipment used.
2.2.3 Indicating gages for internal threads smaller
than 5 mm are not available.
2.3 Determining Size of Gages
2.3.1 Measuring Pitch Diameter. The threewire method of determining pitch diameter size of
thread plug gages is standard for gages in this
Standard. Refer to Appendix B.
2.5 Rounding Procedure for Converting Metric Gage Values to Inch Gage Values
Determine metric gage dimensions from gage
specifications. Calculate the inch gage size by dividing the metric gage size (given to three decimal
places) by 25.4. Round to five decimal places by the
following method: when the first digit discarded is
less than 5, the last digit retained should not be
changed. If the first discarded digit is greater than 5,
or if it is a 5 followed by at least one digit other than
0, the last figure retained should be increased by one
unit. If the first discarded digit is a 5 followed by only
zeros, the last digit retained should be rounded
upward if it is an odd number, but not changed if it is
an even number. Metric dimensions are official
values, and all inch tables shown in Appendix Dare
for reference only.
2.3.2 Size limit adjustments of thread ring and
external thread snap gages are determined by their fit
on their respective calibrated setting plugs. Indicating
gages and thread gages for product external threads
are controlled by reference to appropriate calibrated
setting plugs.
2.3.3 Size limit adjustments of internal thread
snap gages are determined by their fit on their
respective calibrated setting rings. Indicating gages
and other adjustable thread gages for product internal threads are controlled by reference to appropriate
calibrated setting rings or by direct measuring
methods.
10
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
EXAMPLES OF ROUNDING:
6.437243782 is rounded 10 6.43724
6.4J724664J is rounded 10 6.43725
6.43724500 I is rounded to 6.43725
6.437255000 is rounded 10 6.43726
6.437245000 is rounded to 6.43724
thread. At the functional diameter limit, using HI
and LO thread gages, the standard practice is to have
the gage tolerance within the limits of size of the
product thread. Specifications for gage limits are
listed in Tables 4 and 5.
3.5 Standard Thread Gage Tolerances
3 GENERAL PRACTICE
Standard tolerances for thread-working gages,
thread-setting plugs, and setting rings are as follows:
(a) W tolerances, shown in Table 7, represent the
highest commercial grade of accuracy and workmanship and are specified for thread-setting gages;
(b) X tolerances, shown in Table 6, are larger than
W tolerances and are used for product inspection
gages.
Unless otherwise specified, all thread gages and
gaging contacts that directly check the product
thread shall be X tolerance.
3.1 General Design
The design of gages is specified only to the extent
that it affects the results obtained in the gaging of
product threads. Moreover, to serve their intended
purposes satisfactorily, thread gages should be produced by the latest and best manufacturing techniques. The type of steel or wear-resistant material
selected, together with the heat-treating and stabilization processes, should provide wear life and dimensional stability. Thread gaging elements should be
precisely manufactured to assure adequate refinement of surface texture, prevention or elimination of
amorphous or smear metal, and uniformity of thread
form over the entire length of the gaging member.
3.6 Tolerance on lead
Cumulative effect of progressive or erratic helix
variation and thick or thin end thread variations is
specified as an allowable variation between any two
threads not farther apart than the length of the
standard taperlock or trilock gage, shown in ANSI/
AS ME B47 .laM. In the case of setting plugs, the
specified tolerance shall be applicable to the thread
length in the mating ring gage or nine pitches,
whichever is smaller. For setting rings, the tolerance
applies to a thread length of three pitches. The
tolerance on lead establishes the width of a zone,
measured parallel to the axis of the thread, within
which the actual helical path must lie for the specified
length of the thread. Measurements will be taken
from a fixed reference point located at the start of the
first full thread to a sufficient number of positions
along the entire helix to detect all types of lead
variations. The amounts that these positions vary
from their basic (theoretical) positions will be
recorded with due respect to sign. The greatest
variation in each direction [plus and minus (±)] will
be selected and the sum of their values, disregarding
sign, shall not exceed the specified tolerance. If the
variations are all in one direction, the maximum
value governs conformance. In the case of truncated
setting plugs, the lead variations present on the fullform portion and the truncated portion of an
individual gage shall not differ from each other by
more than 0.003 mm over any portion equivalent to
the length of the thread ring gage, or nine pitches,
3.2 Types of Gages
GO thread gages check either the maximummaterial limit or si1.e to assure interchangeable assembly. HI and LO thread gages inspect the HI and
LO functional diameter limit.
GO and NOT GO plain cylindrical plug or ring
gages and snap or indicating gages check the limit or
size of the minor diameter of product internal threads
and the major diameter of product external threads,
respectively.
3.3 Interpretation of Tolerances
Tolerances on lead, half-angle, and pitch diameter
are variations which may be taken independently for
each of these elements and may be taken to the extent
allowed by respective tabulated dimensional limits.
The tabulated tolerance on any one clement shall not
be exceeded, even though variations in the other two
elements are smaller than the respective tabulated
tolerances.
3.4 Direction of Tolerances on Gages
At the maximum-material limit (GO), the dimensions of all gages used for final conformance gaging
arc to be within the limits of size of the product
II
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·
GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ ASME B 1.16M·1984
AN AMERICAN NATIONAL STANDARD
ments are given in Table 14 for external product
threads, in Table 15 for internal product threads, and
in Table 16 for setting gages. See Appendix A for
methods of calibrating and inspecting gages.
whichever is less. (When linear lead and drunkenness
are measured as individual elements and the sum of
these does not exceed the tolerance specified, the gage
is well within tolerance.)
3. 7 Tolerances on Half-Angle
Tolerances are specified for the half-angles rather
than the included angle to assure that the bisector of
the included angle will be perpendicular to the axis of
the thread within proper limits. The equivalent of the
variation from the true thread form caused by such
irregularities as convex, concave or wavy flanks,
rounded crests, or slight projections on the thread
form shall not exceed the tolerance permitted on halfangle.
4 TYPES OF GAGES FOR PRODUCT
INTERNAL THREAD
4.1 GO Working Thread Plug Gages
(Table 2- Gage 1.1)
4.1.1 Purpose and Use. The GO thread. plug
gage inspects the maximum~material GO functional
limit, A,, of product internal thread. The GO thread
gage represents the maximum-material GO functional limit of the product internal thread, and its
purpose is to assure interchangeable assembly of
maximum-material mating parts. GO thread plug
gages must enter and pass through the full-threaded
length of the product freely. The GO thread plug gage
is a cumulative check of all thread elements except
the minor diameter.
3.8 Check of Effect of lead and Flank Angle
Variations on Product Thread
When this check is specified, there are two general
methods available for the inspection procedures
involved.
(a) Direct Measurement of Lead and Half-Angle
of Flanks. The lead and flank angles of the product
thread may be measured by means of available
measuring equipment, such as, but not limited to,
thread indicating gages, projection comparators,
measuring microscopes, graduated cone points, lead
measuring machines, helix variation measuring
machines, and thread flank charting equipment.
Diameter equivalents of such variations from nominal may be calculated: each 0.0025 mm variation in
lead amounts to 0.0043 mm (I. 732 X 0.0025) increase
in functional pitch diameter on external threads or a
decrease in functional pitch diameter on internal
threads for 60 deg. screw threads. The tangent of
half-angle variation times 1.5p equals the approximate maximum change in functional pitch diameter,
based on a height of thread engagement of 0.625H
and equal half-angle variations.
(b) Differential Gaging Utilizing Indicating Thread
Gages. See Sections 4 and 5 for explanation and
illustration of differential gaging for internal and
external threads.
4.1.2 Basic Design. The maximum-material
limit on GO thread plug gages is made to the
prescribed maximum-material limit of the product
internal thread, and the gaging length is equal to the
length of the gaging plug.
4.1.3 Gage Blanks. For practical and economic
reasons, the design and lengths of the gaging plug
members have been standardized for various size
ranges and pitches (see ANSI/ ASME B47.laM or
Table Cl).
4.1.4 Thread Form. The specifications for thread
form are summarized in Table 4 and Fig. 1.
4.1.5 Thread Crests. The major diameter ofthe, .
GO thread plug gage shall be the same as the:';
minimum major diameter of the product internal::·
thread with a plus gage tolerance. The thread crests(
shall be flat in an axial section and parallel to the:!
axis.
3.9 Calibration Requirements and Standards
4.1.6 Thread Roots. The minor diameter of the
GO thread plug gage shall be cleared beyond a p/8
width of flat either by an extension of the sides of the
thread toward a sharp vee or by an undercut no
Calibration requirements and standards for X
tolerance thread gages, snap gages, and indicating
gages, Z tolerance plain gages, and measuring instru12
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
"tl
ro
Ill
E£
-;;;
0
.s
....
tJ::J
·n;
E
"tl
0
....a. 16
0
:0"'
E
f!
c
~
~
.c:
E -;;;
.~
.<:!!
"tl
....
0
c::
.E
E
l':l
.~
c
~
FIG. 1
MAXIMUM-MATERIAL GO FUNCTIONAl liMIT
greater than PI 8 maximum width and approximately
central.
4.1.9 lead and Half-Angle Variations. Lead
and half-angle variations shall be within the limits
specified. See Table 6.
4.1.7 Runout of Pitch and Major Cylinders.
On thread plug gages an eccentric condition produces
an oversize effective major diameter having a width
of flat less than pI 8, which may encroach on the
minimum permissible limit for the root profile of the
product internal thread. The permissible maximum
effective major diameter, as determined by adding
measurement of runout (full-indicator movement)
with respect to the pitch cylinder to ·the measured
major diameter, shall not exceed the maximum major
diameter specified.
4.1. 1 0 Incomplete Thread. The feather edge at
both ends of the threaded section of the gaging
member shall be removed. On pitches coarser than
0.8 mm, not more than one complete turn of the end
threads shall be removed to obtain a full-thread form
blunt start. See Fig. 2. On pitches 0.8 mm and finer, a
60 deg. chamfer from the axis of the gage is
acceptable in lieu of the blunt start.
4.1.11 Chip Grooves. Each GO thread plug
gage, except in sizes M4 and smaller, shall be
provided with a chip groove at the entering end. On
reversible gages, a chip groove shall be provided at
each end. Chip grooves that are in accordance with
4. '1.8 Pi-tch Cylinder. The pitch cylinder shall be
round and straight within the gage pitch diameter
limits specified.
13
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
/--~
/
(
__
I
rise
\
i
,, \
Grlndingwheelor
'""'"""' <ool
+-- \
Start of fullform thread
;
',
\
I
~
diameter
~
FIG_ 2
Romo'< looomplo" '""'' /
for one complete turn at
both ends.
PARTIAL END THREADS AND CHIP GROOVES
TABLE 3
commercial practice are acceptable, such as a groove
cut at an angle with the axis or a longitudinal groove
cut parallel with the axis and extending the complete
length of the gaging member. The groove shall be
located circumferentially at the start of the full
thread, and in all cases the depth shall extend below
the root of the first full thread. The distance from the
major diameter of the thread plug to the crest of the
convolution rise in front of the chip groove, due to
the radius of the convoluting tool, shall be a
minimum of H/2 as shown in Fig. 2. The beginning
of the first thread shall be full form. The recommended widths for chip grooves are as shown in
Table 3.
RECOMMENDED WIDTHS
FOR CHIP GROOVES
Chip Groove Width, A,
mm
Nominal Diameter,
mm
------·--·--·
M4 and smaller
Over M4 to MS, incl.
Over MS to M10, incl.
Over M10 to M12, incl.
Over M12 to M24, incl.
Over M24 to M39, incl.
Over M39
Max.
Min.
No chip groove required
0.91
0.66
1.32
1.07
1.45
1.70
2.11
1.70
1.70
3,30
1.70
4.90
4.2 HI Thread Plug Gages (Table 2- Gage
1.2)
4.1. '12 Identification. The GO thread plugs
should. be marked by the metric nominal siz:e, pitchtolerance class, GO, PD, and pitch diameter in
millimeters (if PD is basic size, tolerance class may be
eliminated).
4.2.1 Purpose and Use. The HI thread plug gage
inspects the HI functional diameter limit, B1, of
product internal thread. The HI thread plug gage
represents the HI functional diameter limit of the
product internal thread.
EXAMPLE:
M8 X I-6H GO PD7.350
14
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ ASME B 1.16M-1984
AN AMERICAN NATIONAL STANDARD
TAfiJL!E 4 SPECIFICATIONS ANID FORMAT FOR TABLES 10 AND 12 - LIMITS OF SIZE OF
UIREAIDEO AND PLAIN GAGES FOR METRIC M EXTERNAL AND INTERNAL THREADS
1
(To be specified)
2
Of external thread to be checked
Pitch
diameter
3
Max. pitch diameter of external thread;
gage tolerance minus
Minor
diameter
4
Max. pitch diameter of external thread;
minus H/2; gage tolerance minus
Pitch
diameter
5
Min. pitch diameter of external thread;
gage tolerance plus
Minor
diameter
6
Min. pitch diameter of external thread
minus 0.2p; gage tolerance plus
GO
7
Max. major diameter of external
thread; gage tolerance minus
NOT GO
8
Min. major diameter of external
thread; gage tolerance plus
Major
diameter
9
Min. major diameter of internal
thread; gage tolerance plus
Pitch
diameter
10
Min. pitch diameter of internal thread;
gage tolerance plus
Major
diameter
11
Max. pitch diameter of internal thread
plus 0.2p; gage tolerance minus
Pitch
diameter
12
Max. pitch diameter of internal thread;
gage tolerance minus
GO
13
Min. minor diameter of internal
·thread; gage tolerance plus
NOT GO
14
Max. minor diamete>r of internal
thread; gage tolerance minus
15
Of internal thread to be checked
Nominal Size and Pitch
Tolerance Class
-··
GO
Thread gages
Gages for
External
Threads
lO
Plain gag~s
for major
diameter
GO
I
Thread gages
Gages for
Internal
Threads
HI
Plain gages
for minor
diameter
Tolerance Class
be forced after the drag is definite. Special requirements such as. but not limited to. an exceptionally
thin or ductile material. or a small number of threads.
may necessitate modification of this practice.
Thread plug gages when applied to the product
internal thread may engage only the end threads
(which may not be representative of the complete
thread). Entering threads on product are incomplete
and permit gage to start. Starting threads on HI plugs
are subject to greater wear than the remaining
threads. Such wear in combination with the incomplete product threads permits further entry of the
gage. HI functional diameter is acceptable when the
HI thread plug gage is applied to the product internal
thread it docs not enter, or if all complete product
threads can be entered, provided that a definite drag
from contact with the product material results on or
before the second turn of entry. The gage should not
4.2.2 Basic Design. To better check the maximum functional diameter limit. the Oank contact is
reduced by truncating the major diameter, and the
length of the gaging element. where practical, is less
than that of the GO gage.
·
4.2.3 Gage Blanks. For practical and economic
reasons. the designs and lengths of the gaging
elements have been standardized for various size
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-19!J4
AN AMEHICAN NATIONAL STANDARD
u
::J
u:J
1)
0
Ci
1)
2
a.
0
E
!'?
u
'0
"'
E -E'iii
~
0
·o
"'
~
10
£
'0
'E"
.c
<11
c:
:;;
,g .E
0c: e
c:
a.
.E
,(
"'
:2
"
"'
~
FIG. 3
HI FUNCTIONAL DIAMETER LIMIT
from p f 8 maximum width, either side of and
approximately central with the center line of the
thread groove.
ranges and pitches (see ANSljASME B47.1aM or
Table Cl).
4.2.4 Thread Form. The specifications for thread
form are summarized in Table 4 and Fig. 3.
4.2.7 Runout of Pitch and Major Cylinders.
The permissible maximum effective diameter, as
determined by adding measurements of runout (full-·
indicator movement) with respect to the pitch
cylinder to the measured major diameter, shall not
exceed the maximum major diameter specified.
4.2.5 Thread Crests. The maximum major
diameter of the HI thread plug gage shall be e4ual to
the maximum pitch diameter of the product internal
thread plus 0.2p with the gage tolerance minus. This
corresponds to a width of flat at the crest of the gage
equal to 0.385p. See Table 4.
4.2.8 Pitch Cylinder. The pitch cylinder shall be
round and straight within the gage pitch diameter
limits specified.
4.2.6 Thread Roots. The minor diameter of the
HI thread plug gage shall be cleared beyond a p/8
width of flat by an extension toward a sharp vee of
the sides of the thread from the position corresponding to this approximate width; or by an undercut to
any dimension no wider than the width resulting
4.2.9 lead and Half-Angle Variations. Lead
and half-angle variations shall be within the limits
specified. See Table 6.
16
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
of thread at sufficient axial positions to check the
full-thread length. Thread rolls shall be applied
axially at several locations (three if possible) over the
full-thread length of product. The circumference shall
be checked at each position.
4.2.10 Incomplete Thread. The feather edge at
both ends of the threaded section of the gaging
member shall be removed. On pitches coarser than
0.8 mm, not more than one complete turn of the end
threads shall be removed to obtain a full-thread blunt
start. See Fig. 2. On pitches 0.8 mm and finer, a 60
deg. chamfer from the axis of the gage is acceptable
in lieu of the blunt start.
4.3.3 Thread Form. The specifications for thread
form are summarized in Table 4 and Fig. 4.
4.3.4 Thread Crests. The outside diameter of the
threaded portion of the GO segments or rolls has the
equivalent of ap/8 flat on the thread with a plus gage
tolerance. The thread crest shall be flat in an axial
section and parallel to the axis of the gaging member.
4.2.1'1 ldenitification. The HI thread plug gage
should be marked with the metric nominal size, pitchtolerance class, HI, PD, and pitch diameter in
millimeters.
EXAMPLE:
M8 X l-6H HI PD7.500
4.3.5 Thread Roots. The minor diameter of the
threaded portion of the GO segments or rolls shall be
cleared beyond a p / S. flat either by an extension of
the flanks of the thread toward a sharp vee or by an
undercut no greater than p/8 maximum width and
approximately central.
4.3 Thread Snap Gages - GO Segments or
Rolls (Table 2- Gages 2.1 and 2.3)
4.3.1 Purpose and Use. The thread snap gage
with two GO threaded segments or two GO zero lead
rolls inspects the maximum-material GO functional
limit, A 1, of product internal thread. The setting of
the GO segments or rolls represents the maximummaterial GO functional limit of the product intenial
thread, and its purpose is to assure interchangeable
assembly of maximum-material mating parts. The
segments or rolls theoretically engage over the fullthreaded length of the product. The segments or rolls
have a cumulative check of all thread elements except
the minor diameter.
Internal thread snap gages by design must have an
outside diameter of gaging elements below minor
diameter of internal thread in order to enter. The
gage checks all thread elements by sensing the
resistance of contact after being set to a master.
The GO thread snap gage can also indicate out-ofroundness of pitch cylinder for 180 deg. ovality by
using the gage at different internal diametral locations on the product thread.
4.3.6 Runout. The pitch and major cylinders of
the threaded portion of the GO segments or rolls
shall not exceed the runout as determined by
measurements of runout (full-indicator movement)
on each gaging member, with respect to the pitch
cylinder. Runout shall not exceed one-half the X gage
major diameter tolerance.
4.3.7 Pitch Cylinder. The pitch cylinder of the
threaded portion of the GO segments or rolls shall be
straight and round within the X gage pitch diameter
limits specified.
4.3.8 Lead, Pitch, and Half-Angle Variations.
Lead, pitch, and half-angle variations shall be within
the limits specified. See Table 6.
4.3.9 Identification. The assembled gage should
be marked by the metric nominal size, pitch-tolerance
class, GO, PD, and pitch diameter in millimeters.
4.3.2 Basic Design. The GO segments and rolls
assembled into gage frames are the design of the
individual gage manufacturer. The lengths of the two
threaded segments and the two thread rolls spaced
180 deg. apart are equivalent to the standard plug
gage blank lengths for practical and economic
reasons. See Table Cl and Fig. 4. Internal product
threads less than 5 mm in diameter are not practical
to check with snap gages. GO thread segments shall
engage 25% or more of the product circumference.
The product shall be checked around circumference
EXAMPLE:
M8 X 1-6H GO PD7.350
4.4 Thread Snap Gages- HI Segments or
Rolls (Table 2 - Gages 2.2 and 2.4)
4.4.1 Purpose and Use. The thread snap gage
with two HI segments or two HI rolls inspects the HI
functional diameter limit, B" of product internal
thread. The setting of the HI segments or rolls
represents the maximum functional diameter limit of
17
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME 81.16M-1984
AN AMERICAN NATIONAL STANDARD
TABLIE 5 SPECIFICATIONS AND FORMAT IFOR TABLES 11 AND 13- LIMITS OF SIZE OF
THREAD~SHTING GAGES FOR METRIC M THREAD WORKING GAGES
Nominal Size and Pitch
1
(To be specified)
Tolerance Class
2
Of external thread to be checked by gage set
with plug
Truncated•
3
Max. pitch diam. of external thread plus 0.2P;
gage tolerance minus
Full-form
4
Max. major diameter of external thread; gage
tolerance plus
5
Max. pitch diameter of external thread; gage tolerance minus
6
Min. pitch diameter of external thread plus
0.2P; gage tolerance minus
-
Plug for GO
Major
diameter
Pilch diameter
Full-Form
and
Truncated
Setting
Plugs
Truncated•
(Note 1)
Plug for lO
Major
diameter
Full-form
7
8
Min. pitch diameter of external thread; gage to!erance plus
Pitch diameter
(Note 2)
9
Min. pitch diameter of internal thread; W gage
tolerance plus
Minor
diameter·
10
Min. minor diameter of internal thread; W gage
tolerance minus
Pitch diameter
(Note 2)
11
Max. pitch diameter of internal thread; W gage
tolerance minus
Minor
diameter
12
Max. minor diameter of internal thread; W
gage tolerance minus
13
Of internal thread to be checked by gage set
with ring
Pitch diameter
Ring for
GO
Solid Thread-Setting
Rings for Snap and
Indicating Gages
.Max. major diameter of external thread provided that major diameter crest width shall not
be less than 0.0254 mm (0.022 mm truncation).
Apply W tolerance plus. Exception: if minimum
major diameter crest width is less than 0.0254
mm (0.022 mm truncation), set nominal crest
width to 0.0254 mm and apply gage tolerance
minus. For the 0.0254 mm crest. major diameter is
equal to the maximum major diameter of the
external thread plus 0.216506p minus the sum of
the external thread pitch diameter tolerance and
0.0440 mm.
-·--Ring for
HI
·----
Tolerance Class
:
•tndicatcd rows apply to truncated setting plugs only.
NOTES:
(1) l:runcated portion is required when optional sharp root profile in Figs. 19 and 21 is used.
(2) Tolerances greater than W tolerance for pitch diameter are acceptable when setting internal indicating or snap gages that
a're capable of compensating and when agreed upon by the supplier and user.
:
18
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GAGES J.I.ND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
TAflJliE 6
X GAGE TOLERANCES FOR THREAD GAGES
Tolerance on Major
or Minor Diameters
(Note 4)
Tolerance on Pitch Diameter
(Notes 2, 4)
mm
Tolerance
on Lead, mm
{Noles 1, 3)
Tolerance
on
Half-Angle
of Thread,
deg. ±min.
To and
Including
100mm
Above
100mm
To and
Including
39mm
Above
39 mm to
100mm
Above
100mm
to 200 mm
Above
200 mm
to 300 mm
1
2
3
4
5
6
7
8
9
0.2
0.25
0.3
0.005
.005
.005
0
0
0
40
40
30
0.008
.008
.008
...
.. .
0.005
.005
.005
. ..
. ..
...
0.35
0.4
0.45
.005
.005
.005
0
0
0
30
30
30
.008
.010
.010
...
.. .
.005
.005
.005
0.008
0.5
0.55
0.6
.005
.005
.005
0
0
0
30
30
20
.010
.010
.010
...
.. .
.. .
.005
.005
.005
.OOB
.008
.OOB
0.65
0.7
0.75
.005
.005
.005
0
0
0
20
20
20
.010
.010
.010
.. .
.. .
. ..
.005
.005
.005
.008
.008
.008
0
0
0
15
15
15
.013
.013
.013
O.Q18
.018
.018
1.5
1.75.
2.
.008
.008
.008
0
0
0
10
10
10
.015
.015
.015
2.5
3.
.006
.008
,0'10
0
0
0
10
10
5
5.
.010
.010
.010
0
0
0
5.5
6.
8.
.010
.010
.010
0
0
0
Pitch,
0.8
1.
'1.25
3.5
4.
4.5
!
...
. ..
...
...
...
...
. ..
. ..
. ..
...
.. .
...
...
...
...
...
.008
.008
.008
.. .
...
.. .
. ..
.. .
...
...
...
...
.008
.008
.008
.010
.010
.010
0.013
.013
.013
0.015
.015
.015
.023
.023
.023
.008
.008
.008
.010
.010
.010
.015
.015
.015
.018
.018
;018
.015
.018
.018
.023
.028
.028
.008
.010
.010
.010
.013
.013
.015
.015
.015
.018
.018
.018
5
5
5
.018
.020
.020
.033
.033
.033
.010
.010
.010
.013
.013
.013
.015
.015
.015
.018
.020
.020
5
5
5
.020
.023
.023
.033
.038
.038
.010
.010
.010
.013
.013
.013
,015
.015
.015
.020
.020
.020
...
...
...
NOTES:
(1) Nllowable variation in lead between any two threads shall not be farther apart than the lengths of the standard gages that are
shown in ANSI/ASME B47.1aM.
(2) Above M300, the tolerance is directly proportional to the tolerance in col. 9, in the ratio of the diameter to 300 mm.
(3) See 5.13.9.
(4) T?lerances apply to designated size of thread. Apply tolerances in accordance with Table 4.
19
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ ASME B1. 16M-1984
AN AMEFIICAN NATIONAL STANDARD
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20
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~
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ANSI/ASME B 1 .16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
the product internal thread. In applying the thread
snap limit gage, the HI functional diameter is
acceptable when gaging clements do not pass the
product thread.
Internal thread snap gages by design must have an
outside diameter of gaging elements below minor
diameter of internal thread in order to enter. The
gage checks the HI functional diameter limit by
sensing the resistance to contact after being set to
master.
The HI thread snap gage will also indicate out-ofroundness of the pitch cylinder for 180 deg. ovality by
using the gage at different diametral locations on
internal thread. The H l thread snap gage will also
check for taper of pitch cylinder by using the gage at
different locations axially on internal thread.
4.4.7 Pitch- Cylinder. The pitch cylinder of the
threaded portion of the HI segments or rolls shall be
round within the X gage pitch diameter limits
specified.
4.4.8 lead, Pitch, and Half-Angle Variations.
Lead, pitch, and half-angle variations shall be within
the limits specified. See Table 6.
4.4.9 Identification. The assembled gage should
be marked by the metric nominal size, pitch-tolerance
class, HI, PD, and pitch diameter in millimeters.
EXAMPLE:
M8 X I-6H HI PD7.500
4.4.2 Basic Design. In order that the HI thread
snap gage may effectively check the HI functional
diameter limit, the flank contact is reduced by
truncating the thread on segments and rolls. As the
design of the segments and rolls is different with
each gage manufacturer, the number of threads
engaged in product thread will vary. Usually, the
number of pitches engaged is approximately two.
Internal product threads less than 5 mm in diameter
are not practical to check with snap gages.
4.5 Thread Snap Gages- Minimum
Material: Pitch Diameter Cone and Vee
(Table 2 - Gage 2.5)
4.5.1 Purpose and Use. The thread snap gage
with two segments or two rolls, both made to cone
and vee design as shown in Fig. 6, inspects the
minimum-material limit pitch diameter, clo of the
product internal thread.
Internal thread snap gages by design must have an
outside diameter of gaging clements below minor
diameter of internal thread in order to enter. The
gage checks the minimum-material pitch diameter
limit by sensing the resistance of contact after being
set to master.
The cone and vee snap gage can check roundness
of pitch cylinder for 180 deg. ovality by using the
gage at different diamctral locations on internal
thread.
The cone and vee snap gage can check taper of
pitch cylinder by using the gage at different locations
axially on internal thread.
4.4.3lhread Form. The specifications for thread
form arc summarized in Table 4 and Fig. 5.
4.4.4 Thread Crests. The maximum major
diameter of the HI segments and rolls shall be equal
to the pitch d iametcr of segment or roll plus 0.2p with
the gage tolerance minus. This corresponds to a
width of flat at the crest equal to 0.385p. See Table 4.
4.4.5 Thread Roots. The minor diameter of the
HI segments and rolls shall be cleared beyond a p/8
width of flat by an extension toward a sharp vee of
the sides of the thread or by an undercut to any
dimension no wider than p/4. Undercut is to be
approximately central with the center line of the
thread groove. See Fig. 5.
4.5.2 Basic Design. The segments arc usually
made having a surface contact slightly above the
pitch line ncar the center of the flank. The rolls are
made with a point or line contact approximately at
the pitch line, depending upon the angle variations of
the thread flanks. See Fig. 6 for details. Internal
product threads less than 5 mm i1.1 diameter arc not
practical to check with snap gages.
4.4.@ Runout. The pitch and major cylinders of
the threaded portion of the HI segments or rolls shall
not exceed the run out as. determined by measurements of runout (full-indicator movement) on each
gaging member, with respect to the pitch cylinder.
Runout shall not exceed one-half of the X gage major
diameter tolerance.
4.5.3 Thread Form. The specifications for thread
form, thread crests, and thread roots arc summarized
in Fig. 6.
21
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDAI'lD
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22
Copyright ASME lnlernal!onal
Provided by IHS under Iicon so with ASME
No roproductlon or nctwprldng permiUod without license rrorn IHS
Order Number. 01986654
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No I for Rosalo,2013-11-22 21:19:12 GMT
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ANSI/ ASME B 1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
Gaging contacts with radius
one-half "best size" thread
wirediam.
FIG. 7 THI~EAD SNAP GAGES- MINIMUMMATERIAl. THREAD GROOVE DIAMETER LIMIT
4.!5.4 Identification. The assembled gage should
be marked by the metric nominal size, pitch-tolerance
class, PD, and pitch diameter in millimeters. .
The roll thread snap gage will check roundness of
the pitch cylinder for 180 deg. ovality by using the
gage at different diametral locations.
Also, the roll thread snap gage will check taper of
the pitch cylinder by using the gage at different
locations axially.
EXAMPLE:
M8 X I-6H PD7.500
4.6.2 Basic Design. The "best size" thread wire
radius contacts on the rolls check the threads at the
pitch cylinder. Ribs on roll contacts are made one
pitch apart. Internal product threads less than S mm
in diameter are not practical to check with snap
gages.
4.6 Thread Snap Gages- Minimum
Material: Thread Groove Diameter Type
(Table 2 - Gage 2.6)
4.6.'i Purpose and Us~. The thread snap gage
with .two rolls with "best size" thread wire radius
conta'cts inspects the minimum-material limit pitch
diam¢ter, D~> of the product internal thread.
Internal thread snap gages by design must have an
outsi9e diameter of gaging elements below minor
diameter of internal thread in 01:der to enter. The
gage ;checks the minimum-material pitch diameter
limit by sensing the resistance of contact after being
set to master.
4.6.3 Thread Form. The specifications for the
form on gage rolls are summarized in Fig. 7.
4.6.4 Identification. The assembled gage with
rolls should be marked with the metric nominal size,
pitch-tolerance class, PD, and pitch diameter in
millimeters.
24
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/AS.ME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
. minor diameter minus the sum of the W gage tolerances for pitch and minor diameter for GO setting
gages, and minus twice the sum for HI setting gages.
EXAMPLE:
M8 X I-6H PD7.500
4. 7 Thread-Setting Solid Ring Gages
4.7.7 Pitch Cylinder. Conformance of these
elements is normally determined by the manufacturing of the setting ring gages to the applicable setting
plug gage.
4.7.1 Purpose and Use. Threadasetting ring
gages are used for setting internal thread indicating
and snap gages. GO thread-setting ring gages are
made to the maximum-material limit of the internal
thread specification and HI thread-setting rings to
the minimum-material limit. Setting rings under 5
mm diameter are too small to be practical.
4.7.8 Pitch Diameter Limitation of Taper. The
taper shall be within gage pitch diameter limits.
4.7.9 Lead and Half-Angle. Lead and half-angle
variations shall be within limits specified in Table 7.
4.7.2 Gage Blanks. GO and HI solid thread ring
gage blanks have been standardized for various size
ranges and pitches (see ANSI/ ASME B47.laM).
Length of gage thread is a minimum of four pitches.
4.7 .1 0 Incomplete Threads. The feather edge at
both ends of the thread ring gage shall be removed.
On gages larger than 12 mm nominal size, or having
pitches coarser than 1.25 mm, not more than one
complete turn of the end threads shall be removed to
obtain a full~thread blunt start. On gages 12 mm
nominal size and smaller, or having pitches of 1.25
mm or finer, a 60 deg. chamfer from the axis of the
gage is acceptable in lieu of the blunt start.
4. 7.3 The GO and HI thread-setting gage threads
are stated in detail below and are summarized in
Tables 5, 7, II, and 13, and Fig. 8.
4. 7.4 Thread Crests
4. 7.4.1 The minor diameter of the GO setting
ring gage is equal to the minimum minor diameter of
the internal thread.
4.7.11 Identification. The GO and HI threadsetting ring gages should be marked by metric
nominal size, pitch-tolerance class, GO or HI, SETTING, PO, and pitch diameter in millimeters.
4. 7 .4.2 The minor diameter of the HI setting
ring gage is equal to the maximum minor diameter of
the internal thread.
EXAMPLE:
M8 X 1-6H GO SETTING PD7.350
M8 X 1·6H HI SETTING PD7.500
4.7.5 Thread Roots
4.7.5.1 The major diameter of the GO setting
ring gage shall be cleared beyondp/8 width of flat by
either an eJttension of the flanks toward a sharp vee
or by a clearance cut of substantially p /8 width and
approximately central. See 5.1.6.
4.8 Plain Plug, Snap, and Indicating Gages to
Check Minor Diameter of Internal Thread
4.7.5.2 The major diameter of the HI setting
ring gage shall be cleared by a clearance cut of
substantially 0.385p width and approximately central. The form is optional. It may clear a p/8 flat if
not undercut. See 5.2.6.
4.8.1 Purpose and Use. The GO and HI thread
gages of all designs are cleared at the root but do not
check the minor diameter of the product internal
thread. Accordingly, 4.8.1 through 4.8.6 describe
types of plain diameter gage or precision instruments
used to check the maximum- and minimum-material
limits of the minor diameter.
4.7.6 Runout of Pitch and Minor Diameter
Cylinders for Sizes 5 mm and larger. The pitch
and minor cylinders of setting ring gages shall not
exceed the runout as stated hereinafter. The permissible mi.himum effective minor diameter as determined
by runout (full~indicator movement) with respect to
the pitch cylinder subtracted from measured minor
diame~er shall not be less than the specified minimum
4.8.2 GO and NOT GO Plain Cylindrical Plug
Gages (Table 2- Gage 3.1). Plug gages shall be
made to Z tolerances and as shown in Fig. 9. GO
shall be made to plus tolerance; NOT GO shall be
made to minus tolerance. GO cylindrical plug gage
must enter and pass through the length of the product
without force. NOT GO cylindrical plug must not
enter. See Table 8 for gage tolerances.
25
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Z"tlO
~ ~~
[~~
TABlE 7
---,-
!i~~
W GAG!!: TOLrfiRANCiE:S FOR THREAD GAGES
a:·:r:s::
Tolerance on Major o~
Mirwr Diame~ers•
~"'m
Q§s-
f!~
lol:ea-<mce on l.ead'·3
}~~
To and
l"iich,
lnd!!lding
mm
12mm
mm
Toierance on
Half-Ang4e
oi Thread,
deg. ±min.
1
2
3
4
0.2
0.25
0.3
0.003
.003
.003
...
On::::
~~
=>
[~
~m
~
r~
:;:
1j Above
12
...
...
"'
0.35
0.4
0.45
.003
.003
.003
0.004
0.5
0.55
0.6
0
0
0
30
30
30
A.~tie
12mm
12 ll'llill
to 100 mm
5
0.008
.008
.008
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100 mm
To and
Including
12mm
6
7
. ..
. ..
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. ..
. ..
. ..
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12mm
22
Aoo11e
llOOmm
200mm
tc 39mm
Above
3'9 mm io
100mm
to 200 mm
to 300 mm
8
9
10
11
12
0.003
.003
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)>!:!2
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0
0
0
20
20
20
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.008
.008
0.008
.008
.010
.003
.003
.003
.004
.004
.004
0
0
0
20
18
18
.008
.010
.008
.010
.008
.010
0.65
0.7
0.75
.003
.003
.003
.004
.004
.004
0
0
0
15
15
12
.008
.008
.008
0.8
.004
.004
.004
0
0
0
12
8
8
.004
.004
.004
.005
0
0
0
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···· .... ····.·.·· ... ·-
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Including
)>)>
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0.005
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.003
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.008
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.013
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.018
.003
.003
.003
.004
.004
.004
.005
.005
.005
0.006
.006
.006
0.008
.008
.008
8
8
6
.013
.015
.015
.013
.015
.015
.018
.023
.023
.003
.003
.004
.004
.005
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.006
.006
.006
.008
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0
0
0
6
6
5
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. ..
. ..
.015
.015
.018
.023
.023
.028
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.006
.008
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.010
.010
0
0
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5
4
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. ..
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.020
.020
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.033
.033
. ..
. ..
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.008
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.010
.010
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0
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4
4
4
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.023
.023
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.033
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me;)
NOTES:
~)>
(1) Allowable variation in lead between any two threads shall not be farther apart than the length of the standard gage that is shown in ANSI/ ASME B47.1aM .
:r-
(2) Above M300, the tolerance is directly proportional to the tolerance in col. 12, in the ratio of the diameter to 300 mm.
(3) See 5.13.9.
(4) Tolerances apply to designated size of thread. Apply tolerance in accordance with Table 5.
-I G)
::IJZ
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l>'Tl
00
Cfl::IJ
GAGES AND GAGING FOR
METBIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
0
P/4 (Ref.)
E
'U
1J
.c
£
·a.
E
.!!!
_j
B
"'
~
iii
~
p
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E
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i3
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0
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(a) Thread-Setting Ring for Ma)(imum-Material
Limit and GO Thread Gage
Form of relief optional
0
0
E
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'0
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0
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x
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ro
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£
iii
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(b) Thread-Setting Ring for Minimum-Material
limit and HI Thread Gage
FIG. 8
TI-IREAD FORM OF SOLID THREAD~SETTING RING GAGES
27
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or notWor~:lng pormiltcd without license from JHS
.......... -- ...... .
Order Number. 01986654
Sold lo:I019866541 NATIONAL MACHINE COMPANY (096226100001)- BYOUNG@NATIONALMA
Not for Resale,2013-11-22 21:19:12 GMT
ANSI/ASME B 1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
e.,
E
u"'
0c
~
Made to Class Z tolerance
(See Table 8)
FIG. 9
MINOR DIAMETER liMIT- CYLINDRICAL PLUG GAGES
The design of the GO and NOT GO cylindrical
plain plug members has been standardized for
various sizes, ranges, and pitches. See ANSI/ ASME
B47.1aM.
with gaging contacts (segments or rolls) at 120 deg. or
180 deg. Size range for segment type is approximately
5 mm to 65 mm in diameter. Above 65 mm, gage
contacts are plain diameter rolls. Another design is
the use of prism fingers for 5 mm size and larger with
contacts at 180 deg. See Fig. 10 for details. In each
design, the gages are set with cylindrical ring gages,
outside micrometers, vernier calipers, or a gap made
with gage blocks and jaw accessories. Gage contacts
are collapsed into tapped hole and released to contact
product minor diameter. Dial indicator gages give the
size of the product between minimum and maximum
tolerance. Snap gages check the minor diameter
limits by sensing the resistance at contact after being
set to master.
4.8.:-~ Identification. The cylindrical gage shall
be marked with the metric nominal size, pitchtolerance class, GO or NOT GO, minor diameter in
millimeters, and MINOR DIAMETER.
EXAMPLE:
M8 X I-6H GO 6.917 MINOR DIAMETER
M8 X·I-6H NOT GO 7.153 MINOR DIAMETER
4.8.4 Precision Instruments (Table 2 - Gage
13). Precision instruments such as dial calipers, inside
micrometer calipers, pocket slide calipers, and vernier inside calipers can also be used to measure the
minor diameter of product internal thread.
4.8.6 Identification. After contacts have been
assembled in the snap or indicating gage, the
assembled gage should be marked with the metric
nominal size, pitch-tolerance class, and the minor
diameter limits in millimeters.
'4.8.5 Snap (Table 2 - Gages 3.3 and 3.5)
arid Indicating Gages (Table 2 - Gages 3.3,
3 .. 5, and 5.2): Plain Diameter Gages for Checking Minor Diameter of Internal Thread. Gages are
m~de to the individual gage manufacturer's standard
EXAMPLE:
M8 X I-6H 6.917-7.153
28
Copyright ASME lnlnrnationfll
Provided by IHS under license wilh ASME
No repraducllon or nalworklng pormllled without license from IHS
Order Number: 01986654
Sold lo:[019B6664] NATIONAL MACHINE COMPANY (096226100001)· BYOUNG@NATIONALMA
Not far Resale,2013-11-22 21:19:12 GMT
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
TABlE 8
GAGE TOLERANCES FOR PLAIN CYLINDRICAL GAGES
Tolerances, mm (Note 1)
Size Range, mm
Above
To and Including
XX
X
v
Z(Note 2)
zz
1
2
3
4
5
6
7
1
21
36
64
115
165
230
21
38
64
115
165
230
300
0.0005
0.0008
0.0010
0.0013
0.0017
0.0020
0.0025
0.0010
0.0015
0.0020
0.0025
0.0033
0.0041
0.0051
0.0018
0.0023
0.0030
0.0036
0.0048
0.0061
0.0076
0.003
0.003
0.004
0.005
0.006
0.008
0.010
0.005
0.006
0.008
0.010
0.013
0.016
0.020
NOTES:
(1) Tolerances apply to actual diameter of plug or ring. Apply tolerances in accordance with Table
4. Symbols XX, X, Y, Z, and Z2 are standard plain cylindrical gage tolerance classes.
(2) Used as tolerance on plain cylindrical plug and ring gages to check minor diameter for internal
threads and outside diameter for external threads. Also used for masters for setting indicating
thread gages where design permits.
4.9 Srnap (Table 2 - Gage 3.4) and Indicating
(Til!ble 2 - Gaga 5.1) Gages to Check
Major Diameter of Internal Thread
assembled gage should be marked with the metric
nominal size, pitch-tolerance class, GO, NOT GO,
major diameter limits in millimet.ers, and MAJOR
DIAMETER INTERNAL.
4.9.1 Purpose and Use. The minimum major
diameter limit of the product internal thread is
considered acceptable when the product thread
accepts GO gages. If further gaging is required, 4.9.2
describes the types of gages used to check the
maximum- and minimum-material limits of the
major diameter.
EXAMPLE:
M8 X l-6H GO 8.000 NOT GO (Customer's Specifications)
MAJOR DIAMETER INTERNAL
4.1 0 Functional Indicating Thread Gages for
Internal Thread (Table 2 - Gages 4.1
and 4.3)
4.9.2 Snap and Indicating Major Diameter
Gages. Gages are made to manufacturer's standard
with 55 deg. maximum gage contacts at 180 deg. in
the form of relieved thread contacts. See Fig. II,
sketch (a) for segment type. Size ranges from
approximately 5 mm to 65 mm. Above 65 mm, gage
contacts are thread relieved rolls at 120 deg. See Fig.
II, sketch (b). Another design is the usc of conical
contact on one finger and two "best size" thread balls
on other contact as shown in Fig. I I, sketch (c). In
each design, the indicating gages are set with cylindrical ring gages, outside micrometers, vernier calipers,
or gap made with gage blocks and jaw accessories.
Gage contacts are collapsed into tapped hole and
released to contact product major diameter. Dial
indicator gages give the size of the product between
minimum and maximum tolerances. Snap gage
checks the major diameter limit by sensing the
resistance at contact after being set to master.
4.1 0.1 Purpose and Use. The GO indicating
thread gage (4.1 and 4.3) inspects the maximummaterial GO functional limit and size, A 1 and A 2, and
the HI functional diameter limit and size, B 1 and B2,
of product internal thread. By the use of segments,
rolls, or fingers, the gage is also used to check
roundness of pitch cylinder. Some types of indicating
gages are set by using thread-setting ring gages. See
4. 7. Other types may be set with plain ring gages or
with gage blocks and jaws. Readings indicate the
position of product thread within the tolerance range.
4.1 0.2 Basic Design. Indicating gages have
three contacts at 120 deg. or two contacts at 180 deg.
Gages are made with segments, rolls, or fingers with
the length of the functional GO gaging elements
equal to the length of the standard GO thread plug
gage. Internal product threads less than 5 mm in
diameter are not practical to check with indicating
gages.
4.9'.3 Identification. After contacts have been
assemhled in the snap or indicating gage, the
29
Copyright ASME lntornnUrinal
Provided by 11-\S under lic-ense with ASME
No reproduclion or netwoiking pormllted wilhoutllconse from JHS
Order Number: 019B6654
Sold to:[01986654] NATIONAL MACHINE COMPANY (0962261 00001)- BYOUNG@NATIONALMA
Nol forResale,2013-11·22 21:19:12 GMT
GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
...
...0"'e
Segments
.!:: E
:2 .!!!
"0
t
(al Three or Two Point Contact
...
...c .,"'
0
~
·- E
Rolls
:2 .!!!
f
(b) Three or Two Point Contact
...
...
QJ
oo;
c E
~-!!!
Prism fingers
"0
*
(c)
FIG. 10 INDICATING PLAIN DIAMETER GAGESMAX.-MIN. MINOR DIAMETER LIMIT AND SIZE
30
Copyright ASME lnlornational
Provided by 11-IS under license with ASME
No reproducllon or nclworldng perm!Ucd withoul/lconse from IHS
Order Number: 01986654
Sold to:[019B6654) NATIONAL MACHINE COMPANY (096226100001)- BVOUNG@NATIONALMA
Not ror Resalo,2013-11·22 21:19:12 GMT
ANSIIASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
I
1/
/
~
(a)
....
1'.l
E
<11
'0
.,
Rolls
(b)
lei
FIG. 11 SNAP AND INDICATING DIAMETER GAGESMAX.-MIN. MAJOR DIAMETER LIMIT AND SIZE
31
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking pormilled without license rrom IHS
Ordor Numbor: 01986654
Sold lo:[019BBB54) NATIONAL MACHINE COMPANY (090226100001)- BYOUNG@NATIONALMA
Nat for Ressle,2013~11p22 21:19:12 GMT
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
~
0
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lOnpOJd jO "WH!P JOU!W "U!II'J
N
....
ci
u::
32
Copyright ASME ln!cnmllonal
Order Number: 01986654
Provided by IHS under license with ASME
No reproduction or networking pormllled wilhoulllcense flam IHS
Sold to:(01986654) NATIONAL MACHINE COMPANY (096226100001) • BYOUNG@NATIONALMA
Nat for Resale,2013~11-22 21:19:12 GMT
Z"UC1
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ao
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ol Ring.
Th,ead and
Tn.!n.:.dion on
Set Plugs,
ol Internal
Thread,
o.no<HH ~
p/4 ~
o_2p
H4=
0.216.51l6p
'':H=
O.ZSp
Dedendum
of Ring
I
Wid!!. of
of Cone
Cont~c~
C-ont~d,
Pitch. p
0-&Sp
M87p
1
2
3
4
5
6
7
8
9
10
11
12
mm
mm
;;nm
mrn
mm
mm
mm
mm
mm
mm
mm
•o.2
'0.25
•o.3
0.35
0.4
0.010
0.012
0.015
0.018
0.020
0.0174
0.0218
0.0261
0.0304
0.0348
0.020
0.025
0.030
0.035
0.040
0.0250
0.0312
0.0375
0.0438
0.0500
0.040
0.050
0.060
0.070
0.080
0.04330
0.05413
0.06495
0.07578
0.08660
0.0500
0.0615
0.0750
0.0875
0.1000
0.06495
0.06119
0.09743
0.11367
0.12990
0.07700
0.09625
0.1155il
0.13475
0.15400
0.45
0.5
0.6
0.7
0.75
0.022
0.025
0.030
0.035
0.038
0.0392
0.0435
0.0522
0.0609
0_0652
0.045
0.050
0.060
0.070
0.075
0.0562
0.0625
0.0750
0.0075
0.0938
0.090
0.100
0.120
0_140
0.150
0.09743
0.10025
0.12990
0.15155
0.16238
0.1125
0.1250
0.1500
0.1750
0.1875
0.14614
0;16238
0.19486
0.22733
0.24357
0.040
o.oee
0_0696
0.0070
0.106e
0.1305
0.1522
0.000
0.100
0.125
0.150
0.175
0.1000
0.125il
0.1562
0.1875
0.2188
0.160
0.200
0.250
0.300
0.350
0.17320
0.21651
0.27063
0.32476
0.37889
0.2000
0.2500
0.3125
0.3750
0.4375
2
2.5
3
3.5
4
0.100
0_125
0.150
0.175
0.200
0.1740
0.2175
0.2610
0.3045
0.3480
0.200
0.250
0.300
0.350
0.400
0.2500
0.3125
0.3750
0.4375
0.5000
0.400
0.500
0.600
0.700
0.800
0.43301
0.54127
0.64952
0.75m
0.86603
4.5
5
5.5
6
8
0.225
0.250
0.275
0.300
0.400
0.3915
0.4350
0.47ll5
0.5220
0.6960
0.450
0.500
0.550
0.600
o.8oo
0.5625
0.6250
0.6875
0.7500
1.0000
0.900
1.000
1.100
1.200
1.600
0.97428
1.00253
1.19078
1.29904
1.73205
Heighl ol
Widlhof
n:aton
GO ""8
p/8 ~
3.12Sp
Truncatk>n
Width of
Flw~ on
GO Ring,
Twke
Aat on
Width
Hall
oi Cone
Conlact lor
Jnlern..tl
Thread.
D.4p
Height oi
Widlh
of Cone
~.o:~rpV-
Cont~d for
1hread
Threild,
H/21).433013;>
External
Thread,
Hoighl,
¥41H=
O-l2476p
Thre.;d of
tO £ling
and HI
!1ug,
4'-38Sp
!l-6p
Threod •nd
Addendum
ol Plug
Thre~d,
Extern.af
Heighl of
SluipVThre•d,
Gl
Double
:n.,
mo
l>::o
Height of
Cll
Meo~n
Me~n
Gage Cone
Contact,
0.11S47H ~
O.lp
j Hall Hoiglu
ZCf.IQ
.andO.D.
ar.d LO PO
.arxl Mlnor
Diam, Also
!ehween Pitch
Cylinder and
Half Height
oi Cone
(Jl
ml>
~0
z
-1
OKtance
Oist~nce:
:;:
~G)
CONSTANTS FOR COMPUTING THREAD GAGE DiMENSIONS
0
~nternal
Thread,
H~
''•H=
G.649519p
O.B6602Sp
1,0B2S32p
13
14
15
16
mm
mm
mm
mm
mm
0.08
0.10
0.12
0.14
0.16
0.08660
0.10025
0.12990
0.15155
0.17321
0.12
0.15
0.18
0.21
0.24
0.12990
0.16238
0.1!l486
0.22733
0.25981
0.17321
0.21651
0.25981
0.30311
0.34641
0.21651
0_27063
0.32476
0.37889
0.43301
0.17325
0.19250
0.23100
0.16950
0.28875
0.18
0.2
0.24
0.28
0.3
0.19486
0.21651
0.25981
0.30311
0.32476
0.27
0.3
0.36
0.42
0.45
0.29228
0.32476
0.38971
0.45466
0.48714
0_38971
0.43301
0.51961
0.60;;12
0.64952
0,48714
0.54127
0.64952
0.75777
0.81190
0.25981
0.32476
0.40595
0.48714
0.56833
0.30000
0.38500
0.48125
0.57750
0.67375
0.32
0.4
o_5
0.6
0.7
0.34641
0.43301
0.54127
0.64952
0.75777
0.48
0.6
0.75
0.9
1.05
0.51962
0.64951
0.81190
0.97428
1.13666
0.69282
0.86603
1.08253
1.29904
1.51554
O.B6603
1.00253
1.35316
1.62380
1,89443
0.5000
0.6250
0.7500
0.8750
1.0000
0.64952
0.81190
0.97428
1.13666
1.29904
0.77000
0.96250
1.15500
1.34750
1.54000
0.8
1.0
1.2
1.4
1.6
0.86603
1.00253
1.29904
1.51554
1.73205
1.2
1.5
1.8
2.1
2.4
1.29904
1.62380
1.94856
2.27332
2.59808
1.73205
2.16506
2.59808
3.03109
3.46410
2.16506
2.70633
3.24760
3.78886
4.33013
1.1250
1.2500
1.3750
1.5000
2.0000
1.46142
1.62380
1.78618
1.94856
2.59808
1.73250
1.92500
2.11750
2-31000
3.08000
1.8
2.0
2.2
2.4
3.2
1.94356
2.16506
2.38157
2.59808
3.46410
2.7
3.0
3.3
3.6
4,8
2.92284
3.24760
3.57235
3.89711
5.19615
3.89711
4.33013
4.76314
5.19615
6.92820
4.87139
5.41266
5.95392
6.49519
8.66025
w
W
0.8
1
1.25
1.5
1.75
o.osa
0.062
0.075
.. Nonstandard pitches
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
4.1 0.3 Thread Form. The specifications for
thread form on GO functional segments, rolls, or
fingers are summarized in Table 4 and Fig. 12.
the use of interchangeable segments, rolls, or balls,
the gage is also used to check roundness and taper of
pitch cylinder. Some types of indicating gages are set
by using a thread-setting ring gage. See 4.7. Readings
indicate the position of product thread within the
tolerance range. Other types may be set with gage
blocks and jaws, plain ring gages, or measuring
machine.
4.1 0.4 Thread Crests. The major diameter of
the GO segments, rolls, or fingers is equivalent to a
p/8 flat with a plus gage tolerance. The thread crests
shall be f1at in an axial plane and parallel to the axis
of the segment, roll, or finger.
4.11.2 Basic Design. Indicating gages have
three contacts at 120 deg. or two contacts at 180 deg.
Gages are made with segments, rolls, or ball design
with cone and vee configuration (pitch diameter type)
or ball only (thread groove diameter type). It is
impractical to attempt checking internal product
threads smaller than 5 mm with indicating gages.
4.-.1 0.5 Pitch Cylinder. The pitch cylinder of the
segments, rolls, or fingers shall be round and straight
within the gage pitch diameter limits specified in
Table 6.
4.1 0.6 Lead and Naif-Angle Variations. Lead
and half-angle variations on thread of segments,
rolls, and fingers shall be within the limits specified.
See Table 6.
4.11 .3 Thread Form. The specifications for cone
and vee segments are shown in Fig. 13; the ball design
and thread groove diameter type are shown in Fig.
14.
4.10.'7 Thread Roots
4.10.7.1 The minor diameter of the GO
threaded segments, rolls, or fingers shall be cleared
beyond a pI 8 width of flat either by extension of the
sides of the thread toward a sharp vee or by an
undercut no greater than p /8 maximum width and
approximately central.
4, 11.4 The major diameter of the cone and vee
segments or rolls is made to manufacturer's standard.
See Figs. 13 and 14.
4.11.5 Identification. The gaging elements, segments, rolls, or ball fingers should be marked wi(h
metric nominal size and pitch. When gage is asssertibled with proper gaging contacts, the indicating gage
should be marked with the metric nominal size, pitc~­
tolerance class, PO, and pitch diameter in mil~l·,
meters.
4.1 0.3 Runout. The pitch and major cylinders of
the threaded portion of the GO segments or rolls
shall not exceed the runout as determined by measurements of runout (full-indicator movement) on
each gaging member, with respect to pitch cylinder.
Runout shall not exceed one-half X gage major diameter tolerance. See Table 6.
EXAMPLE:
M8 X 1-6H PD7.500
4.12 Indicating Runout Thread Gage for
Internal Thread (Table 2 - Gage 4.7)
4.1 0.9 Identification. The gaging elements, segments, rolls, or fingers shall be identified by the
metric nominal size and pitch. When indicating gage
is assembled with proper contacts, the gage should be
marked with the metric nominal site, pitch-tolerance
class, Pb, and pitch diameter limits in millimeters.
4.12.1 Purpose and Use. This indicating gage
inspects the run out of the minor diameter to the pitch
diameter M 1 of the product internal thread. Readings
indicate the position of product minor diameter to
the pitch diameter within the tolerance specified.
EXAMPLE:
MB >< 1-61-1 PD7.350-7.500
4.12.2 Basic Design. Indicating gages have
three contacts, one plain and two threaded, at 120
deg.; or two contacts, one plain and one threaded, at
180 deg. See Fig. 15, sketch (a). The range of
segments is 5 mm and larger; the range of rolls is 75
mm and larger.
The ball-type indicating gage has two balls on one
contact engaging two threads, and one contact has a
4. '11 Minimum-Material Indicating Thread
Gages for internal Thread
{Table 2 - Gages 4.5 and 4.6)
4.11 .1 Purpose and Use. The indicating thread
gage inspects the minimum-material limit and size (C 1
and C2 , D 1 and D 2) of product internal threads. By
34
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oz '"-,
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optional
g
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Gaging elements
Contact central
on pitch line
0:
Alternate Designs
GENERAL NOTE.:
Contactl in other positions near
the pitch cylinder are at .so used .
....,
ZCJ)Q
"§
Contact above
VI
tal
~~!
::oo
(b)
c
~;;g.
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Two or Three Contacts
(Total segment contact to be
25% or more of circumference}
~
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~c
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z
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INDICATING THREAD GAGES -
MINIMUM-MATERIAL PITCH DIAMETER LIMIT AND SIZE- CONE AND VEE
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ ASME 81.1 6M- 1984
AN AMERICAN NATIONAL STANDARD
"'
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36
Copyright ASME lntcrni'ltfonal
Provided by IHS under lh::ense with ASME
No roproducllon or n~:tworklng permillcd without license from IHS
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GAGES AND GAGING FOR
MHRIC M SCREW 1HREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
Total !egmont contact
to· be minimum 25%
0
1
(a!
(bl
FIG. 15 INDICATING THREAD GAGESDIAMETER RUNOUT MINOR TO PITCH
37
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
essentially zero variation in all other thread elements,
while the other size, GO functional size, is the size of
the thread with the effects of all variations in all other
thread elements added to the pitch diameter. The
numerical difference between these two sizes is called
a. cumulative thread element variation differential
and represents the diametral effect of the total
amount of thread elemen't variations.
The inspection process that further refines the total
amount of thread element variation so that the
amount of variation for each individual element
becomes known is called single thread element
plain prism shaped finger 180 deg. apart from the ball
contact. See Fig. 15, sketch (b): the range is 15 mm
and larger.
The indicating gage is set by a GO setting ring gage
(see Fig. 8) with plain gaging contact on minor
diameter of thread ring gage and the thread contact
on pitch diameter of ring thread gage.
4.12.3 Thread Form. The specifications for
thread form on vee segments or rolls are summarized
in Fig. 15. Plain contacts have line bearing on minor
diameter of product. Balls are "best size" thread ball
contacting thread at pitch line.
variation differential.
4.13.2 Cumulative Thread Element Variation
Differential. Indicating gages have either three
contacts at 120 deg. spacing or two contacts at 180
deg. spacing. The indicating gages with segments or
rolls as shown in Figs. 12 and 16, sketch (a) give the
functional size indicating reading, Z. The indicating
gages with cone and vee segments or rolls with one
thread pitch engagement at pitch diameter line, Fig.
13. and thread groove diameter type, Fig. 14, sketch
(a) or (b), or both, shown in Fig. 16, sketches (c) and
(d), give the pitch diameter size indicating reading, X.
The difference in the indicator readings, X - Z,
between the two types of gages gives the cumulative
form differential reading which corresponds to the
pitch diameter equivalent, 11D2c, for the combination
of lead, helix, flank angle, roundness, and taper
variations on the product thread. See Fig. 16.
4.12.4 Thread Crests. The thread crests shall be
flat in an axial plane and parallel to axis of segment
or roll.
4.12.5 lead and Half-Angle Variations. Lead
and half-angle variations on threaded segments or
rolls shall be within the limits specified. See Table 6.
4.12.6 Identification. The gaging elements, segments, rolls, or ball finger should be marked with the
nominal size and pitch. When gage is assembled with
proper gaging contacts, the indicating gage should be
marked with the metric nominal size, pitch-tolerance
class, and RUNOUT.
EXAMPLE:
M8 X l-6H RUNOl'T
4.13.3 Single Thread Element Variation
Differential
4.13.3.1 lead (Helix) Differential Reading.
The indicating gage reading, Y, using the full-form
thread segments or rolls with one thread pitch
engagement, similar to Figs. 12 and 16, sketch (b), is
compared to the reading, Z, using the functional size
gage shown in Figs. 12 and 16, sketch (a). The
difference between the measured values, Y ~ Z, is the
lead differential reading which corresponds to the
pitch diameter equivalent, 11D2A., for the lead !md
helix variation of the product thread.
4. ·J 3 Differential Gaging (Table 2 - Gage
4.8)
4.13.1 The concept of differential gaging for
product internal screw threads makes use of fundamental geometric theorems that relate directly to size,
position, and form.
for differential gaging, two methods are used for
measuring screw thread size:
(a) GO functional size
(b) pitch diameter (or thread groove diameter)
Only when a screw thread has perfect position and
form [i.e., zero variation in lead (including helical
path), flank angle, taper, and roundness] are these
two measurements equal. Differential gaging is a
variables method of in-process inspection, final
conformance inspection, or both, that provides the
actual numerical values for both GO functional and
pitch diameter sizes .. These are the two extreme sizes
of any product screw thread. One of the sizes, pitch
diameter, is the size of the thread pitch diameter with
4.13.3.2 Flank Angle Differential Reading.
The indicating gage reading, X, using segments or
rolls with cone and vee design, Figs. 13 and 16, sketch
(c), is compared to the reading, Y, using the full-forin
thread segments or rolls, similar to Figs. 12 and 16,
sketch (b). Both designs have one thread pitch
engagement. The difference between the measured
values, X - Y, is the flank angle differential reading
which corresponds approximately to the pitch diame38
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ANSI/ASME B 1.16M·1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
e
Functional diameter
Indicator reading
GO functional size
z
also ut~ed for
lead analysis
(a)
Pitch diafl)eter
Indicator reading
y
to
also used for lead and
angle analvsis
.,..,~r:r~~=~"'r.r?~"'r.n Fig. 12
Pitch diameter
(b)
Indicator reading}
measured
(c) or (d)
pitch diameter
(c)
X
{}.02c • X-Z- cumulative form
differential an·aly~is
(See Fig. 13)
(See Fig. 14)
(d)
!c) Uled for
angle analysis only
{}.02 A: Y-Z • individual element
analysi5 for leod variation
{}.020.- X-Y- individual element
analysis for angle variation
FIG. 16
INDICATING THREAD GAGES- DIFFERENTIAL GAGING
39
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
Cone and vee
HI profile
ter equivalent, D.Dlx.. for the combined flank angle
variation on the product thread.
or PO contact
~see Fig. 3 or 13)
4.13.3.3 Roundness and Taper Differential
Readings. By the use of full-form thread segments
or rolls with one thread pitch engagement, similar to
Figs. 12 and 16, sketch (b), cone and vee segments or
rolls, Figs. 13 and 16, sketch (c), or thread groove
diameter type, Figs. 14, sketch (a) or (b), and 16,
sketch (d), the roundness and taper of pitch cylinder
is/ checked. Rotate the product between contacts at
different axial locations on thread for maximum
difference in roundness and taper readings. Two
contacts spaced 180 deg. apart give even lobing outof-rbund measurement. Three contacts spaced 120
deg: apart give odd lobing out-of-round measureme1its.
2
3
4
1'11111111
Inside Micrometer
4:~ 13.4 Thread Form. The functional segments or
Caliper Type
(Ref. Table 2-81, 82, c,, C2,
E 1, E2 , G 1, G2)
roll~, Fig. 16, sketch (a), are described in 4.1 0. The
full-form one thread vee segment or roll, Figs. 12 and
16, sketch (b) upper contact, has a depth of thread
equivalent to the functional type, but relieved on the
outside thread flanks. The full-form cone segment or
roll, Figs. 12 and 16, sketch (b) lower contact, has a
pf8 flat on outside diameter. The cone and vee
segments or rolls, Fig. 16, sketch (c), are described
and shown in J':ig. 13. Thread groove diameter type,
Fig. 16, sketch (d), is described and shown in Fig. 14.
FIG. 17
INSIDE MICROMETER,
CALIPER TYPE
inspects the pitch diameter of the internal thread. It is
shown in Fig. 14, sketch (a). Special fixturing and
ball probes may be required when using a three-axis
coordinate measuring machine for internal measurement of pitch diameter. See Appendices B9 and BIO
for more information on thread-measuring balls.
4.13.5 Identification. The gaging elements, segments, or rolls should be marked by metric nominal
size and pitch. Indicating gages, assembled with
proper contacts, should be marked with metric nominal size, pitch-tolerance class, and the type of differ. entia! reading specified above.
4.16 Optical Comparator and Toolmalter's
Microscope (Table 2 -
Gage 9)
4.16.1 Purpose and Use. The optical comparator magnifies and projects the thread profile on a
screen. Internal threads are checked using cast
replicas. For best profile image, the threaded item is
positioned so that the light is aligned with the thread
lead angle. Since the thread profile is defined in a
plane containing the axis, a correction factor must be
added to the measured flank angle observed normal
to the lead angle. For most standard single lead
threads, the correction factor is less than 0 deg., 5
min. See A2.6.l.
Optical comparators are generally fitted with
lenses providing various magnifications between lOX
and IOOX. Profile dimensions are checked using
· appropriate linear and angular scales on the machine
and by application of thread profile, radius, and
other overlay charts. Flank angles, thread crest and
root flats, root radius, other groove and ridge di-
EXAMPLE:
M8 >< J-6H Flank Angle Differential Variation
4.14 Pitch Micrometers (Table ;2 - Gages 6
and 7)
4.14.1 Purpose and Use. Inside micrometers,
caliper type, are direct reading measuring instruments. Cone and vee contact points are modified for
a HI profile or pitch diameter contact only. See Fig.
17.
4. '15 Thread-Measuring Balls
{Table 2 - Gage 8)
'1·.15.1 Purpose and Use. One indicating gage
using thread-measuring balls as gaging elements
40
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ANSI/ASME B 1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES ANO GAGING FOR
METRIC M SCREW THREADS
stylus displacement, a filtering system for isolating
lobing from surface irregularities, various means for
centering the amplified stylus trace on the polar
chart, and a selection of rotating speeds. For details
on measuring and for other methods for checking
roundness, see ANSI B89.3.1, Measurement of Outof-Roundness.
mensions, and axial plane pitch and lead may be
checked. Major, minor, and pitch diameters are identified, then measured using table traverse readouts.
4.1 ~.2 The toolmaker's microscope is similar in
function to the optical comparator but does not
include screen projection or overlay charts. Magnifications are generally lower than those of optical
comparators. Profile reticules are used in place of
charts.
4.20 Miscellaneous Gages and Gaging
Equipment
4.20.1 The description of internal gages in 4.1
through 4.19 is definitely not a complete catalog of
the various types available for inspection purposes.
The gages not described above may be used provided
they adhere t.o the standard thread practice noted in
this Standard {i.e., truncation, form of thread,
tolerance, etc.) and have producer and consumer
agreement.
4.17 Profile Tracing Instrument
(Table 2 - Gage 1 0)
4.17 .1 Purpose and Use. The instrument
inspects thread contour to an accuracy of 0.005 mm
for 25 mm of horizontal and 2.5 mm of vertical travel
at IOOX magnification.
The tracing on the chart paper may be analyzed for
elements of the thread profile, including depth, crest
width, lead, angle, and radius at root of thread.
The instrument is generally able to check internal
threads of 4.5 mm and larger at magnifications from
5X to IOOX.
5 TYPES OF GAGES FOR PRODUCT
EXTERNAl THREAD
4.1 B Surface Roughness Equipment
(Trnble 2 - Gage 14)
5.1 GO Working Thread Ring Gages
(Table 1 - Gage 1.1)
4.18.1 Purpose and Use. Measurement of
surface roughness on screw· thread flanks is usually
made with an instrument which traverses a radiused
stylus across the lay. The stylus displacement due to
the surface irregularities is electronically amplified
and the meter reading displays the arithmetical
average roughness height in micrometers {see ANSI
B46.1, Surface Texture: Surface Roughness, Waviness, and Lay). Some instruments produce a chart of
the traced path which shows the peak-to-valley
heights of the surface irregularities. Special fixturing
is required to position and guide stylus over thread
surface.
5.1 .1 Purpose and Use. The GO thread ring
gage inspects the maximum-material GO functional
limit, A 1, of product external thread. The GO thread
ring gage when properly set to its respective calibrated thread-setting plug represents the maximummaterial GO functional limit of the product external
thread, and its purpose is to. assure interchangeable
assembly of maximum-material mating parts.
Adjustable GO thread ring gages must be set to the
applicable W (see Table 5, Note 2) tolerance-setting
plugs. The product thread must freely enter the GO
thread ring gage for the entire length of the threaded
portion. The GO thread ring gage is a cumulative
check of all thread elements except the major diameter.
4.19 Roundness Equipment
(Tabla 2 -
Gage 15)
5.1.2 Basic Design. The maximum-material
limit or GO thread ring gage is made to the pre~
scribed maximum-material limit of the product
thread, and the gaging length is equal to the thickness
of the thread ring gage.
4. '19.1 Pmpose and Use. There are two types of
precision roundness measuring instruments: precision rotary tables and precision spindles. A special
stylus coupled to an electric unit records the out-ofroundness on a circular chart as it traces around the
internal cylindrical surface of the workpiece. The
instrument provides a series of magnifications for
5.1.3 Gage Blanks. For practical and economic
reasons, the designs and thicknesses of thread ring
41
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
~
u
"
"0
0
0.
0
"0
E
J:
'0"'
0
'iii'
E
"'
E
,.,
iii
E
... "'u<::
..
2>(
0
"
x "'
3::
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"'
E .Ec
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:2
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'0
... '0~"'
0
<::
·e £iii
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~
FIG. 18
~
·=
MAXIMUM-MATERIAL GO FUNCTIONAL liMIT
of flat less than P/ 4. which may encroach on the
maximum permissible limit for the root profile of the
product external thread. The permissible minimum
effective minor diameter as determined by measurements of runout (full-indicator movement) with respect to the pitch cylinder shall not be less than the
specified minimum minor diameter minus the sum of
the gage tolerances for the pitch and minor diameters.
gages have been standardized for various size ranges
and pitches (see ANSI/ ASME B47.laM or Table
C2).
5.1.4 Thread Form. The specifications for thread
form are summarized in Table 4 and Fig. 18.
5. 'I .5 Thread Crests. The minor diameter of the
GO thread ring gage shall be equal to the maximum
pitch diameter of the product external thread minus
H/2 with a minus gage tolerance. This corresponds to
a width of flat of P/4. The thread crests shall be flat
in an axial section and parallel to the axis.
5.1.8 Pitch Cylinder. Pitch cylinder is transferred by the setting of the thread ring gage to the
applicable truncated setting plug gage.
5.1.9 lead and Half-Angle Variations. Lead
and half-angle variations shall be within the limits
specified in Table 6. Misalignment of the threads on
each side of the adjustable slot may not exceed the
lead limits.
5.1.6 Thread Roots. The major diameter of the
GO thread ring gage shall be cleared beyond P/8
width of flat by either an extension of the flanks toward
a sharp vee or by a clearance cut of substantially P/8
width and approximately central. The root clearance
must be such that the maximum major diameter of the
full-form section of the truncated thread-setting plug
gage is cleared after the gage has been properly set
to size.
5.1.1 0 Incomplete Thread. The feather edge at
both ends of the thread ring gage shall be removed. On
gages larger than M 12 or with a pitch coarser than 1.25
mm. remove not more than one pitch of the partially
formed thread at each end to obtain a full-thread blunt
start. On gages M 12 and smaller or with a pitch of 1.25
mm or finer, the end threads may have a 60 deg.
chamfer from the axis of the gage to a depth of half to
one pitch. This is acceptable in lieu of the blunt start.
5. "i .'7 Runout of Pitch and Minor Cylinders.
On thread ring gages, an eccentric condition results in
an undersize effective minor diameter, having a width
42
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z-co
0
0 0
Ul
o:z:s:
::scnm
TABle 10
Q§~
~ a. m
~~~
~~~
i
<eo~~
::;:?
~)>
I
Gages for Extemal Threads
m>
-lG'l
~ill
·>
S:;z
Gages !or lnteonal Threads
(J)t:J
~~
;;_m
X Thread Gages
[
GO
~
S:Gl
GAGIES fOR Si ANDARD 1HiUAD SERIES, CLASSES 6g AND 6H
M PROfli...iE SClUW THREADS- UMITS Of SIZf
X Thread Gages
Z Plain Gages for
Major Diam.
iO
GO
(')G'l
;:;:l>
~~
z
Z Plain Gages for
Minor Oiam.
HI
-!Gl
Class
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
. Minor
Diam.
GO
1
2
3
4
5
6
M1.6 X 0.35
6g
1.354
1.349
1.202
1.194
1.291
1.296
M2X0.4
6g
1.721
1.716
1.548
1.538
M2.5 X 0.45
6g
2.188
2.183
M3 X 0.5
6g
M3.5 X 0.6
3
Nominal Size
and Pit;:h
"'
~
a
:t
GO
Major
Oiam.
Pitch
Diam.
Major
Diam.
Pilch
Diam.
GO
GO
Class
7
s
9
10
11
12
13
14
15
1.221
1.229
1.581
1.578
1.496
1.499
1.600
1.608
1.373
1.378
1.528
1.520
1.458
1.453
1.221
1.224
1.321
1.318
6H
1.654
1.659
1.574
1.584
1.981
1.978
1.886
1..889
2.000
2.010
1.740
1.745
1.910
1.900
1.830
1.825
1.567
1.570
1.679
1.676
6H
1.993
1.983
2.117
2.122
2.027
2.037
2.480
2.477
2.380
2.383
2.500
2.510
2.208
2.213
2.393
2.383
2.303
2.298
2.013
2.016
2.138
2.135
6H
2.655
2.650
2.438
2.428
2.580
2.585
2.480
2.490
2.980
2.977
2.874
2.877
3.000
3.010
2.675
2.680
2.875
2.865
2.775
2.770
2.459
2.462
2.599
2.596
6H
6g
3.089
3.084
2.829
2.819
3.004
3.009
2.884
2.894
3.479
3.476
3.354
3.357
3.500
3.510
3.110
3.115
3.342
3.332
3.222
3.217
2.850
2.853
3.010
3.007
6H
M4 X 0.7
6g
3.523
3.518
3.220
3.210
3.433
3.438
3.293
3.303
3.978
3.975
3.838
3.841
4.000
4.010
3.545
3.550
3.803
3.793
3.663
3.658
3.242
3.245
3.422
3.419
6H
M5 X 0.8
6g
4.456
4.448
4.110
4.097
4.361
4.369
4.201
4.214
4.976
4.973
4.826
4.829
5.000
5.013
4.480
4.488
4.765
4.752
4.605
4.597
4.134
4.137
4.334
4.331
6H
M6X1
6g
5.324
5.316
4.891
4.878
5.212
5.220
5.012
5.025
5.974
5.971
5.794
5.797
6.000
6.013
5.350
5.358
5.700
5.687
5.500
5.492
4.917
4.920
5.153
5.150
6H
7.160
7.152
6.619
6.606
7.042
7.050
6.792
6.805
7.972
7.969
7.760
7.763
8.000
8.013
7.188
7.196
7.598
7.5&5
7.348
7.340
6.647
6.650
6.912
6.909
6H
6H
s:
NOT
NOT
:JJ'"Tl
mO
;l>:D
tJ
zrn
a~
g-R
....,
"""'
a'~
ooo
rom
"""'
~~
':'z
~~
(J)
~5
!:i~
~r
<OS:
:..:..)>
"'"
s:z
"""
-<m
"
0
s:
~
j
M8 X 1.25
6g
~
~
i5@
c:
~
0
~
z
)>
s:
m
:D
C'i
)>
~
g
)>
Zl>
M8X1
6g
7.324
7.316
6.891
6.878
7.212
7.220
7.012
7.025
7.974
7.971
7.794
7.797
8.000
8.013
7.350
7.358
7.700
7.687
7.500
7.492
6.917
6.920
7.153
7.150
M10 X 1.5
6g
8.994
8.986
8.344
8.329
8.862
8.870
8.562
8.577
9.968
9.965
9.732
9.735
10.000
10.015
9.026
9.034
9.506
9.491
9.206
9.198
8.376
8.379
8.676
8.673
6H
M10 X 1.25
6g
9.160
9.152
8.619
8.606
9.042
9.050
8.792
8.805
9.972
9.969
9.760
9.763
10.000
10.013
9.188
9.196
9.598
9.585
9.348
9.340
8.647
8.650
8.912
8.909
6H
z
zen
~);
-en
~s:
)>m
'Ill
en:-'
~
-
See Notes at end of table.
-
-
'--
----
L _ _ ____
-
L
-
};ioi
zS:
t:l'
l>C'.O
:DCD
0-l>o
s=~.g
~ l~
§~~
6'-Is:
~wm
Q§j[
:;:.:;:.
Iii
s:;:;:.
zz
(.,')
5 g.!;
:;:.:::::
~ m o
<CQ-
mC/l
I A BlUE 1® GAGtS FOR STANDARD IH~!EAD SiERiiES, C!.A.SSES 6g AND 6H
M PROIF!H SCRIEW THR!EADS- liMiTS Of SUZIE (CONT'D)
~~
~~
r
il.s::
::DS:
om
Pco
z=-"
Gages for hternai Threads
~
X Thread Gages
a3
GO
:;:
"'
z"O)
Gages lor lnlemal Threads
~~
o<O
Zco
X Thread Gages
Z Plaln Gages fo~
Major Diarn.
LO
GO
Z Plain Gages for
Minor Diam.
HI
)>,;:.
r-
CJ)
zcoo
2-~Q.
Q'o
;o-a
Nominal Si:~:e
and Pilch
1 Class
1
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
GO
2
3
4
5
6
M10 X 0.75
6g
9.491
9.486
9.166
9.156
9.391
9.396
M12 X 1.75
6g
10.829
10.821
10.071
10.056
M12 X 1.5
6g
10.994
10.986
M12 X 1.25
6g
M12 X 1
(Note 1)
GO
Pilch
Diam.
Major
Diam.
Diam.
GO
GO
Class
7
8
9
10
11
12
13
14
15
9.241
9.251
9.978
9.975
9.838
9.841
10.000
10.010
9.513
9,518
9.795
9.785
9.645
9.640
9.188
9.191
9.378
9.375
6H
10.679
10.687
i0.329
10.344
11.966
11.963
11.701
11.704
12.000
12.015
10.863
10.871
11.413
11.398
11.063
11.055
10.106
10.109
10.441
10.438
6H
10.344
10.329
10.854
10.862
10.554
10.569
11.968
11.965
11.732
11.735
12.000
12.015
11.026
11.034
11.516
11.501
11.216
11.208
10.917
10.920
11.153
11.150
6H
11.160
11.152
10.619
10.606
11.028
11.036
10.778
10.791
11.972
11.969
11.760
11.763
12.000
12.013
11.188
11.196
11.618
11.605
11.368
11.360
10.647
10.650
10.912
10.909
6H
6g
11.324
11.316
10.891
10.878
11.206
11.214
11.006
11.019
11.974
11.971
11.794
11.797
12.000
12.013
11.350
11.358
11.710
11.697
11.510
11.502
10.917
10.920
11.153
11.150
6H
M14 X 2
6g
12.663
12.655
11.797
11.782
12.503
12.511
12.103
12.118
13.962
13.959
13.682
13.685
14.000
14.015
12.701
12.709
13.313
13.298
12.913
12.905
11.835
11.838
12.210
12.207
6H
M14 X 1.5
6g
12.994
12.986
12.344
12329
12.854
12.862
12.554
12.569
13.968
13.965
13.732
13.735
14.000
14.015
13.026
13.034
13.516
13.501
13.216
13.208
12.376
12.379
12.676
12.673
6H
M15 X 1
6g
14.324
14.316
13.891
13.878
14.206
14.214
14.006
14.019
14.974
14.971
14.794
14.797
15.000
15.013
14.350
14.358
14.710
14.697
14.510
14.502
13.917
13.920
14.153
14.150
6H
M16 X2
6g
14.663
14.655
13.797
13.782
14.503
14.511
14.103
14.118
15.962
15.959
15.682
15.685
16.000
16.015
14.701
14.709
15.313
15.298
14.913
14.905
13.835
13.838
14.210
14.207
6H
~
~
·~
~~
\"z
~~
NO
NOT
Pilch
NOT
z
0
l>
::D
0
~
m
~j
~
Major
Diam.
Pih:h
Nz
:1~
??S::
~)>
Nc>
G)J:
s:::z
-<m
"
~
~
-<
~
~
~
!
g"'z
Gl
@)
2!>
~
OC'l
m
~CJ)
C/))>
M16 X 1.5
6g
~0
~
~
m
-IC')
14.994
14.986
14.344
14.329
14.854
14.862
14.554
14.569
115.. 968
15.965
15.732
15.735
-
See Notes at end of table.
16.000
16.015
-
15.026
15.034
----
15.516
15.501
15.216
15.208
14.376
14.379
14.676
14.673
6H
oz
;:oC
m
:E~
-19
::!:Z
~C'l
>-n
co
C/):J:l
Z~()
o
ao
~ tl
g.~;
~~~
S';G:I
::oom
ml>
iii
tiff~
~~-g·
~~~
-IQ
::om
()(I)
.. -.-·
TAI\UIE 10 GAGIES IFOR STANDAIRD THiRIEAD SER~!ES, ClASSES {)g AND 6H
M PROFU.E SCREW THRIEADS-UM&TS OF SBZE {CONT'D)
~~
3-
=>
[~
s:?Z
C/)0
C"lc;)
:;m
G01ges for htemiill Threads
i
~
a
GO
I
z
X Thread Gages
X Thread Gages
Z Plain Gages ior
Major Diam.
~
3
~l>
~~
Gag6 for !rnte!'nai Threads
i.O
GO
...;(;)
HI
:i:
I
en
Diam.
Major
Diam.
!Pitch
Diam.
GO
GO
Cla5!5
7
ll
9
10
11
12
13
14
15
16.006
16.019
16.974
16.971
15.794
16.797
17.000
17.013
16.350
16.358
16.710
16.697
16.510
16.502
15.917
15.920
16.153
16.150
6H
16.854
16.862
16.554
16.569
17.968 17.965
17.732
17.735
18.000
18.015
17.026
17.034
17.516
17.501
17.216
17.208
16.376
16.379
16.676
16.673
6H
17.251
17.236
18.164
18.172
17.564
17.679
19.958
19.955
19.623
19.626
20.000
20.015
16.376
16.384
19.100
19.085
18.600
18.592
17.294
17.297
17.744
17.741
6H
18.994
18.986
18.344
18.329
18.854
18.862
18.554
18.569
19.968
19.965
19.732
19.735
20.000
20.015
19.026
19.034
19.516
19.501
19.216
19.208
18.376
18.379
18.676
18.673
6H
6g
19.324
19.316
18.891
18.878
19.206
19.214
19.006
19.019
19.974
19.971
19.794
19.797
20.000
20.013
19.350
19.358
19.710
19.697
19.510
19.502
18.917
18.920
19.153
19.150
6H
M22 X 2.5
6g
20.334
20.326
19.251
19.236
20.164
20.172
19.664
19.679
21.958
21.955
21.623
21.626
22.000
22.015
20.376
20.384
21.100
21.085
20.600
20.592
19.294
19.297
19.744
19.741
6H
M22 X 1.5
6g
20.994
20.986
20.344
20.329
20.854
20.862
20.554
20.559
21.968
21.965
21.732
21.735
22.000
22.015
21.026
21.034
21.516
21.501
21.216
21.208
20.376
20.379
20.676
20.673
GH
22.003
21.993
20.704
20.686
21.803
21.813
21.203
21.221
23.952
23.949
23.577
23.580
24.000
24.018
22.051
22.061
22.916
20.752
20.755
21.252
21.249
GH
22.8~8
22.316
22.306
22.663
22655
21.797
21.782
22.493
22.501
22.093
22.108
23.962
23.959
23.682
23:685
24.000
24.015
22.701
22.709
23.325
23.310
22.925
22.917
21.835
21.838
22.210
22.207
5H
I' itch
Diam.
Diam.
GO
1
2
3
4
5
6
M17 X 1
6g
16.324
16.316
15.891
15.878
16.206
16.214
M18 X 1.5
6g
16.994
16.986
16.344
16.329
M20 X 2.5
6g
18.334
18.326
M20 X 1.5
6g
~~
M20X 1
.,z
~~
->
~~
l'itdJ
~
;c.:...:.
~ ~
~~
~1i
;G::!
.,a
~~
"'"
s:z
Cl)
Major
Oiam.
Diam.
zen
I
I
)>::0
0
GO
Class
Minor
Diam.
Mino~
i!lild i"ikh
Nominal Size
NOl
il'itch
::!:
::o'Tl
mO
Z Plain GagES for
Minol' Diam.
NOT
G) :I:
-tm
8
s:
I
):o
:g
z
-<
g
~
~
~c
i5
M24X 3
6g
!
:>
s:m
::0
0
>
z
zen
z)>
M24X2
Gg
~~
-CJ)
M25 X 1.5
6g
!ill
~0
>
z
23.994
23.986
23.344
23.329
23.844
23.1152
23.544
23.559
24.732
24.735
24.968
24.965
'
See Notes at end of table.
25.000
25.015
24.026
24.034
24.526
24.511
24.226
24.218
23.376
23.379
23.676
23.673
GH
OS:
~m
rtll
en:"'
~C)
zS:
c...:.
)>co
:DCD
o:.
tn
&~2
co-,.
8:'5:~
cnm
:::~
Q§5"
)>)>
~~[
zz
(/)
TABU Hi GAGES fOR.SIANDARD THREAD SERUES, O.ASS!ES 6g AND 6H
M P'ROHH SCREW THREADS- UMnS OF SlZE (CONT'D)
;<oo
~~[
l!
[~
Gages lor External Threads
~m
)>:::::
5;3>
mCil
:::0~
nm
Gages for Internal Thn•ads
)>(D
z~
f
X Thread Gages
r
a
I
GO
3
"E
Nominal Size
and Pitch
"'
1
C!ass
2
Pitch
Diam.
3
Minor
Diam.
4
Z Plain Gages lor
Major Diam.
lO
Pitch
Diam.
5
2~
~~
ozo
zoo
X Thread Gages
Minor
Diam.
6
NOT
GO
7
GO
8
GO
Major
Diam.
9
j
Z Plain Gages lor
Minor Diam.
HI
l>-1'>
r
Pitch
Diam.
Major
Diam.
Pitch
Diam.
GO
GO
Class
(/)
10
11
12
13
14
15
0
NOT
};!
2
)>
M27 X 3
6g
25.003
24.993
23.704
23.686
24.803
24.813
24.203
24.221
26.952
26.949
26.577
26.580
27.000
27.018
25.051
25.061
25.916
25.898
25.316
25.306
23.752
23.755
24.252
24.249
6H
M27 X 2
6g
25.663
25.655
24.797
24.782
25.493
25.501
25.093
25.108
26.962
26.959
26.682
26.685
27.000
27.015
25.701
25.709
26.325
26.310
25.925
25.917
24.835
24.838
25.210
25.207
6H
M30 X 3.5
6g
27.674
27.664
26.158
26.140
27.462
26.762
26.780
29.947
29.944
29.522
29.525
30.000
30.018
27.727
27.737
28.707
28.689
28.007
27.997
26.211
26.214
26.771
26.768
6H
27.472
M30 X 2
6g
28.663
28.655
27.797
27.782
28.493
28.501
28.093
28.108
29.962
29.959
29.682
29.685
30.000
30.015
26.701
28.709
29.325
29.310
28.925
28.917
27.835
27.838
28.210
28.207
6H
M30 X 1.5
6g
28.994
28.986
28.344
28.329
28.844
28.852
28.544
28.559
29.968
29.965
29.732
29.735
30.000
30.015
29.026
29.034
29.526
29.511
29.226
29.218
28.376
28.379
28.676
28.673
6H
M33 X 2
6g
31.663
31.655
30.797
30.782
31.493
31.501
31.093
31.108
32.962
32.959
32.682
32.685
33.000
33.015
31.701
31.709
32.325
32.310
31.925
31.917
30.835
30.838
31.210
31.207
6H
GlJ:
"'"
M35 X 1.5
6g
33.994
33.986
33.344
33.329
33.844
33.852
33.544
33.559
34.968
34.965
34.732
34.735
35.000
35.015
34.026
34.034
34.526
34.511
34.226
34.218
33.376
33.379
33.676
33.673
6H
"~
M36 X 4
6g
33.342
33.332
31.610
31.592
33.118
33.128
32.318
32.336
35.940
35.937
35.465
35.468
36.000
36.018
33.402
33.412
34.502
34.484
33.702
33.692
31.670
31.673
32.270
32.267
6H
M36 X 2
6g
34.663
34.655
33.797
33.782
34.493
34.501
34.093
34.108
35.962
35.959
35.682
35.685
36.000
36.015
34.701
34.709
35.325
35.310
·34.925
34.917
33.835
33.838
34.210
.34.207
6H
37.663
37.655
36.797
36.782
37.493
37.501
37.093
37.108
38.962
38.958
38.682
38.686
39.000
39.015
37.701
37.709
38.325
38.310
37.925
37.917
36.835
36.638
37.210
37.207
6H
zcno
2.. !2..;:::;
_c.
+:a.
0\
Qo
:::0
0
::rJ'iS
Q
~
!!~
~ffi
~.:!!;
~~
;G=!
"'0
"'z
~~
~3:
~,.
-<m
""
g
-<
0
1§:
~
~
~
"'d
6g
z
~
M40 X 1.5
6g
0
z
j!!
~
-I G)
;:!1)>
('")G)
m
M39 X 2
c
~
m
---------
See Notes at end of tab!{'.
38.994
38.984
38.344
38.329
38.844
38.854
38.544
38.559
39.966
39.964
39.732
39.736
40.000
40.015
39.026
39.036
39.526
39.511
39.226
39.216
38.376
38.380
38.676
38.672
S::Vl
(/))>
nZ
6H
::oO
m
~G)
)>
--~~
rz
~C)
)>"11
00
(1)::0
zun
a~-~
a~~
~~~
cr :r: s::
~tnrn
; [~
~G>
mJ>
[~~
~~~
<eo-
l!
Gages for ii:demal Threads
r
GO
3
'I:
rn
...
Nominal Size
and Pitch
~~
~z
~~
NO
1
Minor
Class
2
3
M42 X 4.5
6g
39.014
39.001
M42 X 2
6g
M45 X 1.5
Diam.
Pitch
Diam.
Minor
Diam.
Gl;!;
"'"
s:z
"s:
~
g
~
!
~c
mJ>
GO
4
5
6
37.065
37.045
38.776
38.791
40.663
40.653
39.797
39.782
6g
43.994
43.984
M48 X 5
6g
M48 X2
GO
~9
z
Z Plain Gilges fo;
Minor Diam.
HI
~G>
GO
Pitch
Diam.
Major
Oiam.
Pitch·
Diam..
GO
GO
Class
7
6
9
10
11
12
13
14
15
37.878
37.898
41.937
41.933
41.437
41.441
42.000
42.020
39.077
39.090
40.292
40.272
39.392
39.379
37.129
37.133
37.799
37.795
6H
40.493
40.503
40.093
40.108
41.962
41.958
41.682
41.686
42.000
42.015
40.701
40.711
41.325
41.310
40.925
40.915
39.835
39.839
40.210
40.206
6H
43.344
43.329
43.844
43.854
43.544
43.559
44.968
44.964
44.732
44.736
45.000
45.015
44.026
44.036
44.526
44.511
44.226
44.216
43.376
43.380
43.676
43.672
6H
44.681
44.668
42.516
42.496
44.431
44.444
43.431
43.451
47.929
47.9:25
47.399
47.403
48.000
48.020
44.752
44.765
46.087
46.067
45.087
45.074
42.587
42.591
43.297
43.293
6H
6g
'46.663
46.653
45.797
45.782
46.483
46.493
46.083
46.098
47.962
47.958
47.682
47.686
48.000
48.015
46.701
46.711
47.337
47.322
46.937
46.927
45.835
45.839
46.210
46.206
6H
M50 X 1,5
6g
48.994
48.984
48.344
48.329
48.834
48.844
48.534
48.549
49.968
49.964
49.732
49.736
50.000
50.015
49.026
49.036
49.538
49.523
49.238
49.228
48.376
48.380
48.676
48.672
6H
M55 X 1.S
6g
53.994
53.984
53.344
53.329
53.834
53.844
53.534
53.549
54.968
54.964
54.732
54.736
55.000
55.015
54.026
54.036
54.538
54.523
54.238
54.228
53.376
53.380
53.676
53.672
6H
--.1
-<m
0
z
Qa>
(,1)0
Major
Diam.
_,
.,z
:....•
~~
s;::l>
l
X Thread Gages
1 Plain Gages for
Major Diam.
LO
Pitch
Diam.
01!_
~i
C)Cil
Gages for In lerna! Thre<!ds
X Thread Gages
ia
m"'
!!!.~
m"'
::Dm
-
g:~
zrn
-IG>
TABU 10 GAGES :FOR STANDARD THRIEAD SfE!UfS, G .. ASSIES tg AND 6H
M PRdfU::!E·· SCR~W--THREADS- UMITS Of SiZf (CONI'!J)
I
NOT
NOT
)>
z
M56 X 5.5
6g
52.353
52.340
49.970
49.950
52.088
52.101
50.988
51.008
55.925
55.921
55.365
55.369
56.000
56.020
52.428
52.441
53.883
53.863
52.783
52.770
50.046
50.050
50.796
50.792
6H
M56X2
6g
54.663
54.653
53.797
53.782
54.483
54.493
54.083
54.098
55.962
55:958
55.682
55.686
56.000
56.015
54.701
54.711
55.337
55.322
54.937
54.927
53.835
53.839
54.210
54.206
6H
58.994
58.984
58.344
58.329
58.834
58.844
58.534
58.549
59.968
59.964
59.732
59.736
60.000
60.015
59.026
59.036
59.538
59.523
59.238
59.228
58.376
58.380
58.676
58.672
6H
60.023
60.010
57.425
57.402
59.743
59.756
58.543
58.566
63.920
63.916
63.320
63.324
64.000
64.023
60.103
60.116
61.678
61.655
60.478
60.465
57.505
57.509
58.305
58.301
6H
~
~
)>
s:m
::D
(')
)>
zJ>
z
ZCil
M60 X 1.5
6g
~~
ocn
zS:
)>m
Gl
~0
en
-- - - -
z
@
::D"T1
mO
)>::D
0
M64 X6
6g
- - - ~-----
See Notes at end of table.
- -L _ _ -
-
r-txl
Cll::-'
~a;
zS:
0'
)>-
::o(p
0~
Z""CO
aa
c
] ~~
~~~
o:cs:
~cnm
:l>:l>
HI
zz
til!
lfABU: 10
i~~
~~
~>
[~
)>.:::::
GAGf5 !FOR STANDARD liHRtAD SERB!:§, Cl!.ASStS 6g AND 6H
s:>
M PROFIIUE SC~EW THREADS- UMRTS OF SiZlE (CONI'D)
mtl'l
Gages for External Threads
:l>l:lll
::0~
()m
-
I
•m
i
Gages ior Internal Threads
X Thread Gages
f
a
c;o
Z:-
ze)
X Thread Gages
l Plain Gages for
Major Diam.
1.0
GO
~H-;:
Z Plain Gages for
Mino~ Diam.
HI
o<a
Za:>
:<>.;..
3
:;:
!'"'
Nominal Size
"'
and ?itch
Class
Pitch
Diam.
Minor
Oiam.
Pitch
Diam.
Minor
Diam.
GO
NOT
GO
Major
Diam.
Pitch
Diam.
Major
Diam.
~itch
Diam.
GO
NOT
GO
tl'l
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M64X 2
6g
62.663
62.653
61.797
61.782
62.483
62.493
62.083
62.098
63.962
63.958
63.682
63.686
64.000
64.015
62.701
62.711
63.337
63.322
62.937
62.927
61.835
61.839
62.210
62.206
6H
M65 X 1.5
6g
63.994
63.984
63.344
63.329
63.834
63.844
63.534
63.549
64.968
64.963
64.732
64.737
65.000
65.015
64.02£
64.036
64.538
·64.523
64.238
63.376
63.380
63.676
63.672
6H
64.226
M70 X 1.5
tig
68.994
68.984
66.344
68329
68.834
68.844
68.534
68.549
69.968
69.963
69.732
69.737
70.000
70.015
69.026
69.036
69.538
69.523
69.238
69.228
68.376
68.381
68.676
68.671
6H
M72X£
6g
68.023
66.010
65.425
65.402
67.743
67.756
66.543
66.566
71.920
71.915
71.320
71.325
72.000
72.023
68.103
68.116
69.678
69.655
68.478
68.465
65.505
65.510
66.305
66.300
6H
M72X2
6g
70.663
70.653
69.797
69.782
70.483
70.493
70.083
70.098
71.962
71.957
71.682
71.687
72.000
72.015
70.701
70.711
71.337
71.322
70.937
70.927
69.835
69.840
70.210
70.205
6H
M75 X 1.5
6g
73.994
73.984
73.344
73329
73.834
73.844
73.534
73.549
74.968
74.963
74.732
74.737
75.000
75.015
74.026
74.036
74.538
74.523
74.238
74.228
73.376
73.381
73.676
73.671
6H
~~
M80X6
6g
76.023
76.010
73.425
73.402
75.743
75.756
74.543
74.566
79.920
79.915
79.320
79.325
80.000
80.023
76.103
76.116
77.678
77.655
76.478
76.465
73.505
73.510
74.305
74.300
6H
~
M80 X2
6g
78.663
78.653
77.797
77.782
78.483
78.493
78.083
78.098
79.962
79.957
79.682
79.687
80.000
80.015
78.701
78.711
79.337
79.322
78.937
78.927
77.835
77.840
78.210
78.205
6H
Mao x 1.5
6g
78.994
78.984
78.344
78.329
78,834
78.844
78.534
78.549
79.968
79.9£3
79.732
79.737
80.000
80.015
79.026
79.036
79.538
79.523
79.238
79.228
78.376
78.381
78.676
78.671
6H
ZCJ>
S.S!..
.;..
QO
a~
:::0,;.:.,
~
z
0
>
:0
0
g~
}g
Nm
0~
~.:e;
~~
NO
Nz
->
:.l.'
.!9S::
Nt)
Gl:I:
~
~
J
a'"c
~
M85 X2
6g
Gl
m
83.663
83.653
82.797
82.782
83.483
83.493
83.083
83.098
84·.962
84.957
84.682
84.687
85.000
85.015
83.701
83.711
84.337
84.322
83.937
83.927
82.835
82.840
83.210
83.205
6H
86.023
86.010
83.425
83.402
85.743
85.756
84.543
84.566
89.920
89.915
89.320
89.325
90.000
90.023
86.103
86.116
87.678
87.655
86.478
86.465
83.505
83.510
84.305
84.300
6H
@
~
M90X6
6g
z
~
->
()Cl
3;tl'l
z
0
m
:tiC>
---------
See Notes at end of table.
tl'l>
oZ
:cO
m
:ECl
)>
-tC>
J::oz
me>
:l>"T1
00
(IJ:O
~~~
~0c..:::.~~5-
~!~
a· :r: :s::
S::Gl
~H;
::J(I)r;;
iU
~rn
~gg
cE:q91-
u
s:>
2
g_rn
i
f
a
Z Plain Gages for
Major Diam.
x
tJ)
GO
;;~
~
:n)>
mel
~z
:i!Gl
:n"T1
mO
X Thread Gages
X Thread Gages
3
OQ
Gages for Internal Threads
Gages for External Threads
ZC/l
£1)0
TABU: 10 GAG!ES fO!R STANDARD THREAD S!ER!ES, ClASSES 6g AND 6H
M PROfilE SCRIEW THREADS- UMITS OF SRZE (CON'i'D)
lO
GO
HI
Pikh
)>:::!0
Z Plain Gages for
Minor Diam.
0
£1)
Nominal Size
and Pitch
Class
Pitch
Diam.
Minor
Diam.
Piich
Diam.
Minor
Diam.
GO
NOT
GO
Major
Diam.
Diam.
Major
Oiam.
Pitch
Diam.
GO.
NOT
GO
Class
1
2
3
4
5
6
7
3
9
10
11
12
13
14
15
M90X2
6g
88.663
88.653
87.797
87.782
88.483
88.493
88.083
88.098
89.962
89.957
89.682
89.687
90.000
90.015
88.701
86.711
89.337
89.322
88.937
88.927
87.835
87.840
88.210
88.205
6H
M95X2
6g
93.663
93.653
92.797
92.782
93.473
93.483
93.073
93.088
94.962
94.957
94.682
94.687
95.000
95.015
93.701
93.711
94.351
94.335
93.951
93.941
92.835
92.840
93.210
93.205
6H
M100 X 6
6g
96.023
96.010
93.425
93.402
95.723
95.736
94.523
94.546
99.920
99.915
99.320
99.325
100.000
100.023
96.103
96.116
97.703
97.660
96.503
96.490
93.505
93.510
94.305
94.300
6H
M100 X2
6g
98.653
98.653
97.797
97.782
98.473
98.483
98.073
98.088
•99.962
99.957
99.682
99.687
100.000
100.015
98.701
98.711
99.351
99.336
98.951
98.941
97.835
97.840
98.210
98.205
6H
M105 X 2
6g
103.663
103.648
102.797
102.774
103.473
103.488
103.073
103.096
104.962
104.957
104.582
104.687
105.000
105.023
103.701
103.n6
104.351
104.328
103.951
103.936
102.835
102.840
103.210
103.205
6H
M110X2
6g
108.563
108.648
107.797
107.774
108.473
108.488
108.073
106.096
109.962
109.957
109.682
109.687
110.000
110.023
108.701
108.716
109.351
109.328
108.951
108.936
107.835
107.840
108.210
108.205
6H
I
Q Ei
::0,:....:.
ffl::I
~~
~~
~~
~::!
NO
~~
:..;.r-
~~
Gl:I:
"'"
s:z
-<m
8
s:
~
M120 X 2
6g
g
~
I
117.797
117.774
118.473
118.488
118.073
118.096
119.962
119.956
119.682
119.688
120.000
120.023
118.701
118.716
119.351
119.328
118.951
118.936
117.835
117.841
118.210
118.204
6H
s::m
:D
0
128.663
128.648
127.797
127.774
128.473
128.488
128.073
128.096
129.962
129.956
129.682
129.688
130.000
130.023
128.701
128.716
129.351
129.328
128.951
128.936
127.835
127.841
128.210
128.204
6H
l>
Zl>
M140 X2
6g
138.663
138.648
137.797
137.774
138.473
138.488
138.073
138.096
139.962
139.956
139.682
139.688
140.000
140.023
138.701
138.716
139.351
139.328
138.951
138.936
137.835
137.841
138.210
138.204
6H
-(/)
--~-
Gl
~0
118.663
118.648
6g
z
(§)
z
l>
M130 X 2
j
~
c
l>
See Notes at end of table.
z
z (/)
~~
~3:
)>m
r-t:D
cn:'"
~a)
zS:
O'
l>cD
:II CD
0,.
Z"OC1
o
ao
~l~
~~~
o:=s::
::~cnm
Oc-
g g.~
)>)>
zz
~~~
w
~:::1::1
)>:::::
::l:n Cl
S:l>
<Oro-
N~
mrJ>
::os:;
~;
('im
)>OJ
[~
ri
z~
zOi
~s:
6.:.
TABlE 10 GAGES FOR STANDARD THREAD SERIES, ClASSES 6g AND 6H
M PROFilE SCREW THREADS- UMITS OF SiZE (CONT'D)
a
3
:;:
Ul
z~
)>.;:..
r
fJ)
Gages for Internal Threads
Gages for External Threads
X Thread Gages
Nominal Size
and Pilch
g.~
i~
GO
0
X Thread Gages
Z Plain Gages lor
Major Diam.
LO
HI
GO
)>
::0
Z Plain Gages for
Minor Diam.
0
Class
Pilch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Oiam.
GO
GO
Major
Diam.
Pilch
Diam.
Major
Diam.
Pitch
Diam.
GO
GO
Class
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M150 X 2
6g
148.663
148.648
147.797
147.774
148.473
148.488
148.073
148.096
149.962
149.956
149.682
149.688
150.000
150.023
148.701
148.716
149.351
149.328
148.951
148.936
147.835
147.841
148.210
148.204
6H
M160 X 3
6g
158.003
157.988
156.704
156.676
157.779
157.794
157.179
157.207
159.952
159.946
159.577
159.583
160.000
160.028
158.051
158.066
158.951
158.923
158.351
158.336
156.752
156.758
157.252
157.246
6H
M170 X 3
6g
168.003
167.968
166.704
166.676
167.779
167.794
167.179
167.207
169.952
169.944
169.577
169.585
170.000
170.028
168.051
168.066
168.951
168.923
168.351
168.336
166.752
166.760
167.252
167.244
6H
M180 X 3
6g
178.003
177.988
176.704
176.676
177.779
177.794
177.179
177.207
179.952
179.944
179.577
179.585
180.000
180.028
178.051
178.066
178.951
178.923
178.351
178.336
176.752
176.760
177.252
177.244
6H
M190 X 3
6g
188.003
187.968
186.704
186.676
187.753
187.768
187.153
167.181
189.952
189.944
169.577
189.565
190.000
190.D28
166.051
188.066
168.986
168.958
168.386
188.371
186.752
186.760
187.252
187.244
6H
M200 X 3
6g
198.003
197.988
196.704
196.676
197.753
197.768
197.153
197.181
199.952
199.944
199.577
199.585
200.000
200.028
198.051
198.066
198.986
198.958
198.386
198.371
196.752
196.760
197.252
197.244
6H
1
ztn
I
i!
z
NOT
NOT
0.
9
ro_
~~
j.,:.cn
~~
'<'z
~~
~Q
"'~
:t~
"'"'
"'"
~)>
Gl"'
;:z
-<m
"
~
~
0
Rl
~
~
~c
z
Gl
tel
-
-
- -
---
s::
m
-I G)
~)>
GENERAL NOTE: All GO gages for external threads are the same as 4g6g sizes.
()G)
m
NOH:
(1) M14 X 1.25-special thread for spark plugs only. See applicable document for thread tolerance class and limiting dimensions.
wl>
s:;cn
()Z
::oO
m
~
i5
:fG>
)>
~
:x:z
j;
-I G)
~G)
l>'tl
00
rJ>::O
Z-:JC"l
Hi
a~~
g55ffi
TABU 11
~~~
Iii
~~!::.
W Tiuead-Seltiilg Piugs
l!
[~
r
f
a
GO
LO
s:l>
z
enO
HI
QCl
ml>
Major Diam.
"~
~e
z
:iCl
Major Diam.
Nominal SizE:>
and Pilch
iCia:;s
Trunca~ed
Form
Pitch
Diam.
Truncated
Full
Form
l'ilch
Diam.
!'itch
Diam.
l
2
3
4
5
6
7
8
9
M1.6 X 0.35
6~
1.424
1.416
1.581
1.589
1.354
1.351
1.361
1.353
1.542
1.550
1.291
1.294
1.801
1.793
1.981
1.989
1.721
1.718
1.734
1.726
1.949
1.957
2.278
2.270
2.480
2.488
2.188
2.185
2.207
2.199
Full
Minor
Diam.
Pitch
Diam.
Minor
Diam.
Class
10
11
12
13
...
- ..
-.-.-
. -...
-.-
-.-
1.654
1.657
...
...
--.
...
. ..
-.-
- ..
. --
2.454
2.462
2.117
2.120
--.
- ..
. ..
. -.
. -.
. -.
. ..
. ..
--.
- ..
- ..
. -.
..-
- ..
- ..
- ..
-.-
...
. -.
. --
:IJ"r.
mO
)>:tl
0
M2 X 0.4
M2.5 X 0.45
ZCJl
0
:tlm
(5 ~?
W Threacl-Se'Wng Rings
GO
~m
sCl
m)>
-!Cl
SEHiNC GAGES fOR STANDARD THREAD SERIES, Ci..ASSIES 6g and 6H
M P!lO!FU.iE SC!RfW THREADS- UMITS OIF Sll!E
0
::;c:
=:o
6!4
6g
w~
:.;,r-
2.655
2.652
2.680
2.672
2.961
2.%9
2.580
2.583
M3.5 X 0.6
6~
3.209
3.201
3.479
3.467
3.089
3.085
3.124
3.116
3.472
3.480
3.004
3.007
---
3.663
3.655
3.978
3.986
3.523
3.520
3.573
3.565
3.978
3.986
3.433
3.436
-.-
---
---
-.-
--.
M4 X 0.7
6g
"""
"'"'
n
c
z
~
~
- ..
4.456
4.453
4.521
4.513
4.976
4.9B4
4.361
4.364
4.460
4.483
4.134
4.126
4.605
4.602
4.334
4.329
6H
M6 X 1
6g
5.524
5.511
5.974
5.987
5.324
5.321
5.412
5.399
5.974
5.987
5.212
5.215
5.350
5.353
4.917
4.904
5.500
5.497
5.153
5.140
6H
z
s::
:tl
n
)>
6g
7.410
7.397
7.972
7.985
7.160
7.157
7.292
7.279
7.972
7.985
7.042
7.045
7.186
7.191
6.647
6.634
7.348
7.345
6.912
6.899
6H
M8X1
6g
7.524
7.511
7.974
7.987
7.324
7.321
7.412
7.399
7.974
7.987
7.212
. 7.215
7.350
7.353
6.917
6.904
7.500
7.497
7.153
7.140
6H
9.162
9.149
9.958
9.981
8.862
8.865
9.026
9.029
8.376
8.363
9.206
9.203
8.676
8.663
6H
9.292
9.279
9.972
9.985
9.042
9.045
9.168
9.191
6.647
. 8.634
9.348
9.345
6.912
8.899
6H
·-
M10 X 1.5
6g
9.294
9.281
9.968
9.981
8.994
6.991
M10 X 1.25
6g
9.410
9.397
9.972
9.985
9.150
9.157
..
Sc>c Note~ at end of tablt-.
)>
)>
M8 X 1.25
0
@
0
.. -
4.976
4.984
z
~
"'
d
.. -
4.616
4.608
~
~
---
. --
- ..
6~
;g
g""
...
-.-
M5 X 0.8
~~
~~
- ..
2.980
2.988
.!,.Z
;G~
,o
,z
_,.
.. -
2.755
2.747
~
en
. ..
6g
~g
~~
. ..
- ..
M3 X 0.5
::;:],:..:.
~~
I
m
z:t>
z
zen
~~
-en
~s:
)>m
't:D
en:-
j;!t»
c·
zS::
)>tQ
:XI (X)
c~
Z"llO
~ ~~
~~~
O::I:~
~cnm
~~~
TABU: 11
:,:::--.:;.
HI
~
-
<
)':.>)>
SIETT!NG GAGES fOR ..STANDARD IHRitAD S~~:UIE§, CLASSES 6g and 61H
M PROFH.. E SCRlEW THREA.DS-UMSTS Of S!.ZE (CONT'D)
z;z
)':.>~
s:>
mW
:DS:
rsm
-~~
----
i~
W Thread-Seiling Plugs
W Thread-Setting Rings
g:~
:;rn
r
GO
g
~
I
Major Diam..
~
~
5:
Nominal Size
and Pilch
"'
Truncated
Class
Full
form
GO
!..0
HI
zm
~~
Major Diam.
Pitch
Dram.
Full
Truncated
form
Pitch
Diam..
Pitch
Diam.
Minor
Oiam ..
Pitch
Diam.
Minor
Diam.
OcD
Zco
Class
l»+>-
r
(/)
1
2
3
4
5
6
7
8
9
10
11
12
13
M10 X 0.75
6g
9.641
9.633
9.978
9.986
9.491
9.488
9.541
9.533
9.978
9.986
9.391
9.394
9.513
9.516
9.188
9.180
9.645
9.642
9.378
9.370
6H
6g
11.179
11.164
11.966
11.981
10.829
10.826
11.029
11.014
11.966
11.981
10.679
10.682
10.863
10.866
10.106
10.091
11.063
11.060
10.441
10.426
6H
M12 X 1.5
6g
11.294
11.281
11.968
11.981
10.994
10.991
11.154
11.141
11.968
11.981
10.854
10.857
11.026
11.029
10.376
10.363
11.216
11.213
11.676
11.663
6H
M12 X 1.25
6g
11.410
11.397
11.972
11.985
11.160
11.157
11.278
11.265
11.972
11.985
11.028
11.031
11.188
11.191
10.647
10.634
11.368
11.365
10.912
10.899
6H
~~
M12 X 1
(Note 1)
6g
11.524
11.511
11.974
11.987
11.324
11.321
11.406
11.393
11.974
11.987
11.206
11.209
11.350
11.353
10.917
10.904
11.510
11.507
11.153
11.140
6H
\"z
M14 X 2
6g
13.063
13.048
13.962
13.977
12663
12658
12.903
12.888
13.962
13.977
12.503
12508
12.701
12.706
11.835
11.820
12.913
12.908
12.210
12.195
6H
M14 X 1.5
6g
13.294
13.281
13.968
13.981
12.994
12.990
13.154
13.141
13.968
13.981
12.854
12.858
13.026
13.030
12.376
12.363
13.216
13.212
12.676
12.663
6H
M15 X 1
6g
14.524
14.511
14.974
14.987
14.324
14.320
14.406
14.393
14.974
14.987
14.206
14.210
14.350
14.354
13.917
13.904
14.510
14.506
14.153
14.140
6H
M16 X 2
6g
15.063
15.048
15.962
15.977
14.663
14.658
14.903
14.888
15.962
15.977
14.503
14.508
14.701
14.706
13.835
13.820
14.913
14.908
14.210
14.195
6H
6g
15.294
15.281
15.968
15.981
14.994
14.990
15.154
15.141
15.968
15.981
14.854
14.858
15.026
15.030
14.376
14.363
15.216
15.212
14.676
14.663
6H
6g
16.524
16.511
16.974
16.987
16.324
16.320
16.406
16.393
16.974
16.987
16.206
16.210
16.350
16.354
15.917
15.904
16.510
16.506
16.153
16.140
6H
17.294
17.281
17.968
17.981
16.994
16.990
17.154
17.141
17.968
17.981
16.854
16.858
17.026
17.030
16.376
16.363
17.216
17.212
16.676
16.663
6H
~~a.
Qo
~m
~~
~~
NO
t..h
~
_,.
,z
:..;.r
_,
~s:
Gl:I:
""
s:z
z
0
p
::!l
0
M12 X 1.75
zcno
~
-<m
8s:
i
0
I
~
M16 X 1.5
"'
~
Gl
@
M17 X 1
~0
~
)>
M18 X 1.5
~-
6g
See Notes at end of table.
-·
-
m
-lC>
()Cl
:!19
m
~ln
Clll»
c
z
~
nz
:DC
m
:ECl
p
-lCl
::I:Z
~Cl
)>.,
00
tn:D
Z"ttO
o
ao
] ~~
ii~
"'m
~
TABH 11
HI
5~~
g:~
;;_m
~
Nominal Size
and Pitch
a-
3
:I'
"'
zoo
g,.!2.
~
0
4
5
,z
_,
:;..r-
M20 X 2.5
6g
18.834
18.819
19.958
19.973
M20 X 1.5
6g
19.294
19.281
M20 X 1
6g
M22 X 2.5
~
~
Diam.
Minor
Diam.
Pitch
Oiam.
:tGl
Minor
Diam.
;IJ'TI
Class
12
13
18.334
18.329
1e.664
18.649
19.958
19.973
18.164
18.169
18.376
18.381
17.294
17.279
18.600
18.595
17.744
17.729
6H
19.968
19.981
18.994
18.990
19.154
19.141
19.968
19.981
18.854
18.858
19.026
19.030
18.376
18.363
1'9.216
19.212
18.676
18.663
6H
19.'524
19.511
19.974
19.987
19.324
19.320
19.406
19.393
19.974
19.987
19.206
19.210
19.350
19.354
18.9.17
18.904
19.510
19.506
19.153
19.140
6H
6g
20.834
20.819
21.958
21.973
20.334
20.329
20.664
20.649
21.958
21.973
20.164
20.169
20.376
20.381
19.294
19.279
20.600
20.595
19.744
19.729
6H
M22 X 1.5
6g
21.294
21.281
21.968
21.981
20.994
20.990
21.154
21.141
21.968
21.981
20.854
20.858
21.026
21.030
20.376
20.363
21.216
21.212
20.676
20.663
6H
M24 X 3
6g
22.603
22.586
23.952
23.967
22.003
21.998
22.403
22.388
23.952
23.967
21.603
21.608
22.051
22.056
20.752
20.737
22.316
22.311
21.252
21.237
6H
M24 X 2
6g
23.063
23.048
23.962
23.977
22.663
22.658
22.693
22.878
23.962
23.977
22.493
22.498
22.701
22.706
21.835
21.620
22.925
22.920
22.210
22.195
6H
M25 X 1.5
6g
24.294
24.281
24.966
24.981
23.994
23.990
24.144
24.131
24.966
24.981
23.644
23.848
24.026
24.030
23.376
23.363
24.226
24.222
23.676
23.663
6H
1..1\
....,
Gl
z
s::
6g
25.603
25.588
26.952
26.967
25.003
24.998
25.403
25.386
26.952
26.967
24.603
24.808
25.051
25.056
23.752
23.737
25.316
25.311
24.252
24.237
6H
M27 X 2
6g
26.063
25.893
26.962
26.977
25.663
25.658
25.893
25.878
26.962
26.977
25.493
25.498
25.701
25.706
2HI35
25.820
25.925
25.920
25.210
25.195
6H
m
;D
0):>
Zl>
z~
~~
0[/)
M30 X 3.5
6g
@
~
[/)
):>
M27 X3
~
z
!!';
5
):>;D
):>
0
c
z
mO
0
11
Rl
~
Pitch
10
;::
g
l
P-itch
Diam.
9
Nc>
Gl:I:
g
Tmncated
z
Full
Form
8
~~
~~
(')Gl
~l>
:E~
Hl
7
~~
NO
Nz
GO
6
g~
=<'t!
..,-
form
3
::tl,;..:,
¥~
NC>
Truncaaed
Pitch
Diam.
2
1
o::
Class
s;l>
z
Major Oiam.
fuli
:om
ncn
[/)0
1!.0
Major Diam.
[
-lGl
W Tnread-Sei:ing Rings
GO
[
ml>
--
W iihread-SeU&ng l'!ugs
~~
=>
S:Gl
SEHING GAGES FOR STANDARD THRIEAD SE!IU!ES, ClASSES 6g and 6H
M !PROHiE. SCREW .THilUADS- liMITS Off Sill: (CONT'D)
28.374
28.356
29.947
29.965
27.674
27.669
28.162
28.144
29.947
29.965
27.462
27.467
27.727
27.732
26.211
26.193
28.007
26.002
26.771
26.753
GH
zS::
l>m
r-IXJ
en:-'
M30X2
6g
29.063
29.048
29.962
29.977
28.663
28.658
28.893
28.878
29.962
29.977
28.493
28.498
28.701
28.706
27.835
27.820
28.925
28.920
28.211)
28.195
6H
-
See Notes at end of table.
~a:
zS::
O'
>'"'
0~
:DID
Z"1JC)
~ ~~
~ ~~
~~~
o:::r:s:
::::s (l)m
~~~
g~3
lit
Qm-
l!
W Thread-Setting Plugs
[~
W Thread-Setting Rings
GO
;1.m
i
g
a
3
GO
lO
Major Diam.
:;:
)>:::::
s:>
~~
-m
(
/
>co
z-
-
!
~
>>
zz
C/)
SHT!NG GAGES fOR STANDARD THREAD SJE!UJES, ClASSES 6g and 6H
M PIROfH.E SCREW THREADS- UMaTS Of S~Zt {CONT'D)
TA8llE 11
Hl
z~
~~
o(O
Major Diam.
Nominaf Size
and Pitch
Truncated
iFuli
Form
Pitch
Diam.
Truncated
Form
Pitch
Oiam.
Pitch
Oiam.
Minor
Class
Diam.
Pitch
Diam.
Minor
Diam.
Class
r
1
2
3
4
5
6
7
8
9
10
11
12
13
~
6g
29.294
29.281
29.968
29.981
28.994
28.990
29.144
29.131
29.968
29.981
28.844
28.848
29.026
29.030
28.376
28.363
29.226
29.222
28V6
28.663
6H
>
::r:l
i'uli
UJ
ZCD
)>.j>.
C/)
M30 X 1.5
z
0
0
M33 X 2
6g
32.063
32.048
32.962
32.977
31.663
31.658
31.893
31.878
32.962
32.977
31.493
31.498
31.701
31.706
30.835
30.820
31.925
31.920
31.210
31.195
6H
M35 X 1.5
6g
34.294
34.281
34.968
34.981
33.994
33.990
34.144
34.131
34.968
34.981
33.844
33.848
34.026
34.030
33.376
33.363
34.226
34.222
33.676
33.663
6H
M36 X 4
6g
34.142
34.124
35.940
35.958
33.342
33.337
33.918
33.900
35.940
35.958
33.118
33.123
33.402
33.407
31.670
31.652
33.702
33.697
32.270
32.252
6H
M36 X 2
6g
35.063
35.048
35.962
35.977
34.663
34.658
34.893
34.878
35.962
35.977
34.493
34.498
34.701
34.706
33.835
33.820
34.925
34.920
34.210
34.195
6H
M39 X 2
6g
38.063
38.048
38.962
38.977
37.663
37.658
37.893
37.878
38.962
38.977
37.493
37.498
37.701
37.706
36.835
36.820
37.925
37.920
37.210
37.195
6H
M40 X 1.5
6g
39.294
39.281
39.968
39.981
38.994
38.989
39.144
39.131
39.968
39.981
38.844
38.849
39.026
39.031
38.376
38.363
39.226
39.221
38.676
38.663
6H
~
M42 X 4.5
Gg
39.914
39.894
41.937
41.957
39.014
39.008
39.678
39.658
41.937
41.957
38.778
38.784
39.077
39.083
37.129
37.109
39.392
39.386
37.799
37.779
GH
~
M42 X2
6g
41.063
41.048
41.962
41.977
40.663
40.657
40.893
40.878
41.962
41.977
40.493
40.499
40.701
40.707
39.835
39.820
40.925
40.919
40.210
40.195
6H
44.294
44.281
44.968
44.981
43.994
43.989
44.144
44.131
44.968
44.981
43.844
43.849
44.026
44.031
43.376
43.363
44.226
44.221
43.676
43.663
6H
45.681
45.661
47.929
47.949
44.681
44.675
45.431
45.413
47.929
47.949
44.431
44.437
44.752
44.758
42.587
42.567
45.087
45.081
43.297
43.277
6H
:;oO
47.063
47.048
47.962
47.977
46.663
46.657
46.883
46.868
47.962
47.977
46.483
46.489
46.701
46.707
45.835
45.820
46.937
46.931
46.210
46.195
6H
:EO
>
-;Gl
ZCliO
s.~s.
~~
l.n
~
~!
~~
~~
;l:;::!
.,o
.,z
_,
:....•
~~
"'"
s:z
-<m
G) :I:
~
~
j
M45 X 1.5
6g
~
c
z
G)
@
:;;:
~>
m
(")G)
3:Cil
C/))>
M48 X5
6g
~
0
~
3:
m
-!G)
M48 X 2
6g
J>
See Notes at end of table.
- --·
~---.-
·-·
-·-
oz
m
:cz
;:go
>"T''
00
Cll:C
Z-::10
Hi
c~>
[~~
TABlE 11
iii
~a§:
g~~
!
1~
=>
W Thread-Seiiing Plugs
[~
Nominal Size
and !'itch
3
:;:
Class
Truncaled
:IJm
()Ul
~):>
z
!/)0
GO
LO
Major Diam.
I
fa
m;J:>
-!G)
W Tiuead-Setting Rings
GO
r
S::G">
SETI!NG GAGES FOR STANDARD THREAD SERIES, CLASSES 6g and 6!H
M Pl10iFH.E SCiRtW THR~ADS- UMDTS O!F SIZE (CONT'D)
HI
nG">
:IJ:l>
mGl
:Ez
Major Diam.
full
form
Pitch
Oiam.
Truncated
Full
form
l'i«ch
Oiam.
Pilch
Oiam.
Minor
Oiam.
Pitch
Diam.
Minor
Diam.
;!G)
:IJ.,
Class
zrn
~~
Q 0
2
3
<!
5
6
7
a
9
111
11
12
13
M50 X 1.5
6g
49.294
49.281
49.968
49.981
48.994
48.989
49.134
49.121
49.968
49.981
48.834
48.839
49.026
49.031
48.376
48.363
49.238
49.233
48.676
48.663
6H
M55 X 1.5
6g
54.294
54.281
54.968
54.981
53.994
53.989
53.134
54.121
54.968
54.961
53.834
53.839
54.026
54.031
53.376
53.363
54.238
54.233
53.676
53.663
6H
M56 X 5.5
6g
53.452
53.432
55.925
55.945
52.353
52.347
53.188
53.168
55.925
55.945
52.088
52.094
52.428
52.434
50.046
50.026
52.783
52.777
50.796
50.776
6H
M56X2
6g
55.063
55.048
55.962
55.977
54.663
54.657
54.883
54.868
55.962
55.977
54.483
54.489
54.701
54.707
53.835
53.820
54.937
54.931
54.210
54.195
6H
M60 X 1.5
6g
59.294
59.2B1
59.968
59.981
58.994
58.989
59.134
59.121
55.968
55.981
58.834
58.839
59.026
59.031
58.376
58.363
59.238
59.233
58.676
58.663
.6H
M64X6
6g
61.223
61.200
63.920
63.943
60.023
60.017
60.943
60.920
63.920
63.943
59.743
59.749
60.103
60.109
57.505
57.482
60.478
60.472
58.305
56.282
6H
M64X2
6g
63.063
63.046
63.962
63.977
62.663
62.657
62.883
62.668
63.962
63.977
62.483
62.469
62.701
62.707
61.835
61.820
62.937
62.931
62.210
62.195
6H
M65 X 1.5
6g
64.294
64.281
64.968
64.981
63.994
63.989
64.134
64.121
64.968
64.981
63.834
63.839
64.026
64.031
63.376
63.363
64.238
64.233
63.676
63.663
6H
U1
m~
~~
~~
Z=!
"'0
_,.
"'z
_,.
~·
!1?3:::
(/)
U\
;yP.:.
~~
:l>:Il
0
en
1
mO
"'Cl
G):C
s:z
-<m
Cl
0
s:
~
~
I
zG)
6g
69.294
69.281
69.968
69.961
68.994
68.989
69.134
69.121
69.968
69.961
68.834
66.639
69.026
69.031
68.376
66.363
69.238
69.233
68.676
68.663
6H
M72X6
6g
69.223
69.200
71.920
71.943
68.023
68.017
66.943
68.920
71.920
71.943
67.743
67.749
68.103
66.109
65.505
65.482
66.478
68.472
66.305
66.262
6H
69.835
69.820
70.937
70.931
70.210
70.195
6H
73.376
73.363
74.238
74.233
73.676
73.663
6H
~
z
Z(J)
~;;
-(/)
M72X2
6g
71.063
71.048
71.962
n.977
70.663
70.657
70.883
70.668
71.962
71.977
70.483
70.489
70.701
70.707
M75 X 1.5
6g
74.294
74.281
74.968
74.981
73.994
73.989
74.134
74.121
74.968
74.981
73.834
73.839
74.026
74.031
~
~
m
:IJ
0)>
Z)>
@
0
)>
~
M70 X 1.5
"'6
c
)>
z
~~
l>m
r-CD
(J);-'
-
See Notes at end of table.
-
- · -
---
---·--
~a;
z~
C'
)>co
:em
0-f>o
&i~
~ ~~
~~~
O:rs:
~cnm
Q§§:
J:>l>
22
2. ~ 3
(/)
iU
TABU: 11
u·l
W Thread-Setting Plugs
~m
J"
"'
Nominal Size
and Pi!ch
Class
Truncaled
1
2
M80 X6
GO
LO
Major Diam.
s:~
g,;s:
c:;m
I
W Thread-Selling Rings
GO
§
~
a3
)>~
SUTiNC GAGiES fOR ST ANDAfiUJ THREAD SIERIIES, CLASSIES 6g and 6H
M PROfi!!..IE SCRiEW THREADS- UM!T§ Of SBZE (CONT'D)
l>QJ
z~
zai
I
HI
~~
o<a
ZCiO
Major Diam.
l>-1:>
r
Form
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
Pilch
Diam.
Minor
Diarn.
Class
~
6
7
8
9
iO
11
12
13
0
76.023
76.017
76.943
76.920
79.920
79.943
75.743
75.749
76.103
76.109
73.505
73.482
76.478
76.472
74.305
74.282
6H
79.962
79.977
78.663
78.657
78.883
78.868
79.962
79.977
78.483
78.489
78.701
78.707
77.835
77.820
78.937
78.931
78.210
78.195
6H
79.294
79.281
79.968
79.981
78.994
78.989
79.134
79.121
79.968
79.981
78.834
78.839
79.026
79.031
78.376
78.363
79.238
79.233
78.676
78.663
bH
6g
84.063
84.048
84.962
84.977
83.663
83.657
83.883
83.868
84.962
84.977
83.483
83.489
83.701
83.707
82.835
82.820
83.937
83.931
83.210
83.195
6H
M90 X 6
6g
87.223
87.200
89.920
89.943
86.023
86.017
86.943
86.920
89.920
89.943
85.743
85.749
86.103
86.109
83.505
83.482
86.478
86.472
84.305
84.282
6H
;:;::!
~~
M90 X 2
6g
89.063
89.048
89.962
89.977
88.663
88.657
88.883
88.868
89.962
89.977
88.483
88.489
88.701
88.707
87.835
87.820
88.937
88.931
88.210
88.195
6H
"'"
s:z
-lm
M95 X 2
6g
94.063
94.048
94.962
94.977
93.663
93.657
93.873
93.858
94.962
94.977
93.473
93.479
93.701
93.707
92.835
92.820
93.951
93.945
93.210
93.195
6H
M100 X 6
6g
97.223
97.200
99.920
99.943
96.023
96.017
96.923
96.900
99.920
99.943
95.723
95.729
96.103
96.109
93.505
93.482
96.503
96.497
94.305
94.282
6H
99.063
99.048
99.962
99.977
98.663
98.657
98.873
98.858
99.962
94.977
98.473
98.479
98.701
98.707
97.835
97.820
98.951
98.945
98.210
98.195
6H
104.063
104.040
104.962
104.985
103.663
103.655
103.873
103.850
104.962
104.985
103.473
103.481
103.701
103.709
102.835
102.812
103.951
103.943
103.210
103.187
6H
109.063
109.040
109.962
109.985
108.663
108.655
108.873
108.850
109.962
109.985
108.473
108.481
108.701
108.709
107.835
107.812
108.951
108.943
108.210
108.187
6H
Full
Full
Form
Pitch
Oiam.
Truncated
3
4
5
6g
77.223
77.200
79.920
79.943
M80 X 2
6g
79.063
79.048
M80X1.5
6g
M85 X 2
en
z
)>
::0
zen
~~
lJI
0\
:::0,.:....:,
-~
;:!
M~
~~
~~
~~
.,a
~~
""'
g
s:
~-<
§
~
g
~
"'
M100 X 2
6g
--·
~
c:
z
M105 X 2
~
M110 X 2
6g
~
i
~
s:m
-fc;)
;;!!)>
C">G>
m
s:cn
en>
nz
::cO
m
6g
--
- -
-·-
-
--
;:EG>
)>
-~e
-
::z:z
~G)
l>"l1
00
cn::c
Z"OC1
~ ~i
~~~
g.~~
""m
S:Cl
~~~
m3>
-lCl
(=;Ul
:f ;;~
:nm
on=:
~~g
.,t5~!!!..
[~
IAfBliE 11
~
SHif~NG
[~
ri"
s:~
GAGIES fOR STANDARD THREAD SERI!ES, CILASS!ES 6g AND 6H
M i?!ROfH.E SCREW THlUADS-UMI1S OF SIZE {CONT"O}
enO
£Cl
W Thread-Selling Plugs
GO
~
"
GO
1.0
Major Diam.
:i'
m~
W Thread-Seiling Rings
~z
-lCl
:I:
HI
:n-n
mO
Major Diam.
)>:::l
0
{J)
Nominal Size
and Piich
Class
Truncated
full
Form
Piich
Diam.
Truncated
Full
!Form
?itcn
Diam.
Pilch
Diam.
Minor
Diam.
Diam.
Minor
Diam.
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
M120 X 2
6g
119.063
119.040
119.962
119.985
118.663
118.655
118.873
118.850
119.962
119.985
118.473
118.481
118.701
118.709
117.835
117.81:.!
118.951
118.943
118.210
118.187
6H
M130 X 2
6g
129.063
129.040
129.962
129.985
128.663
128.655
128.873
128.850
129.962
129.985
128.473
128.481
128.701
128.709
127.835
127.812
128.951
128.943
128.210
128.187
6H
M140 X 2
6g
139.063
139.040
139.962
139.985
138.663
138.655
138.873
138.850
139.962
139.985
138.473
138.481
138.701
138.709
137.835
137.812
138.951
138.943
138.210
138.187
6H
~~
:::0,.:..:,
M150 X 2
6g
149.063
149.040
149.962
149.985
148.663
148.655
148.873
148.850
149.962
149.985
148.473
148.481
148.701
148.709
147.835
147.812
148.951
148.943
148.210
148.187
6H
"'"'
o"'
M160 X 3
6g
158.603
158.580
159.952
159.975
158.003
157.995
158.379
158.356
159.952
159.975
157.779
157.787
158.051
158.059
156.752
156.729
158.351
158.343
157.252
157.229
6H
M170 X 3
6g
168.603
168.580
169.952
169.975
168.003
167.995
168.379
168.356
169.952
169.975
167.779
167.787
168.051
168.059
166.752
166.729
168.351
168.343
167.252
167.229
6H
M180 X 3
6g
178.603
178.580
179.952
179.975
178.003
177.995
178.379
178.356
179.952
179.975
177.779
177.787
178.051
178.059
176.752
176.729
178.351
178.343
177.252
177.229
6H
188.603
188.580
189.952
189.975
188.003
187.995
188.353
188.330
189.952
189.975
187.753
187.761
188.051
188.059
186.752
186.729
188.386
188.378
187.252
187.229
6H
198.603
198.580
199.952
199.975
198.003
197.995
198.353
198.330
199.952
199.975
197.753
197.761
198.051
198.059
196.752
196.729
198.386
198.378
197.252
197.229
6H
._,
zco
0
0
'
-...l
~~
~0
.?~
~~
~~
~5
"'z
~>
:.l.r""
~!5::
~,.
Gl:I:
"'"
;:::;;:
-lm
g
3>
;::
~
g
~
~
~c
z
Gl
@
~
~
~
?iadt
z
3>
s::
m
M190 X 3
M200 X 3
6g
6g
- -
GENERAL NOTE: All GO setting plug gages are the same as 4g6g sizes.
NOTE:
(1) M14 X 1.25-special thread for spark plugs only. See applicable document for thread tolerance class and limiting dimensions.
:n
0
3>
Z3>
z
zen
~~
-en
OS:
~m
r-IIJ
w:-'
~C)
zS::
0'
3>co
:DCXI
0.,.
z-an
~~i
~~~
~'::.co
D::c~
:::lUJm
0:::::-
; g_=.
~~
zz
~~~
;c.~
on::::
~~~
~
s:l;;
mtfl
~
~~
TABU: 12
g_~
;;.m
~
§
GAGES FOR STANDARD THREAD SiER!ES, ClASSES 4g6g AND 6H
M f'ROfal.E SCREW ifHRfADS- liMITS OIF SOlE
Gages for htemal Threads
~
Gages for ijnternal Threads
X TluNd Gages
~
:;:
GO
"'
Nominal Size
and Pitch
Z Plain Gages for
Major Diam.
tO
Pitch
Diam.
GO
GO
Class
7
8
9
10
11
12
13
14
15
1.244
1.252
1.581
1.578
1.496
1.499
1.600
1.608
1.373
1.378
1.528
1.520
1.458
1.453
1.221
1.224
1.321
1.318
6H
1.679
1.684
1.599
1.609
1.981
1.978
1.886
1.889
2.000
2.010
1.740
1.745
1.910
1.900
1.830
1.825
1.567
1.570
1.679
1.676
6H
1.993
1.983
2.143
2.148
2.053
2.063
2.480
2.477
2.380
2.383
2.500
2.510
2.208
2.213
2.393
2.383
2.303
2.298
2.013
2.016
2.138
2.135
6H
2.655
2.650
2.438
2.428
2.607
2.612
2.507
2.517
2.980
2.977
2.874
2.877
3.000
3.010
2.675
2.680
2.875
2.865
2.775
2.770
2.459
2.462
2.599
2'.596
6H
4g6g
3.089
3.084
2.829
2.819
3.036
3.041
2.916
2.926
3.479
3.476
3.354
3.357
3.500
3.510
3.110
3.115
3.342
3.332
3;222
3.217
2.850
2.853
3.010
3.007
6H
M4 X 0.7
4g6g
3.523
3.518
3.220
3.210
3.467
3.472
3.327
3.337
3.978
3.975
3.838
3.841
4.000
4.010
3.545
3.550
3.803
3.793
3.663
3.658
3.242
3.245
3.422
3.419
6H
M5 X 0.8
4g6g
4.456
4.448
4.110
4.097
4.396
4.404
4.236
4.249
4.976
4.973
4.826
4.629
5.000
5.013
4.480
4.488
4.765
4.752
4.605
4.597
4.134
4.137
4.334
4.331
6H
M6X1
4g6g
5.324
5.316
4.891
4.878
5.253
5.261
5.053
5.066
5.974
5.971
5.794
5.797
6.000
6.013
5.350
5.358
5.700
5.687
5.500
5.492
4.917
4.920
5.153
5.150
6H
Class
GO
1
2
3
4
5
6
M1.6 X 0.35
4g6g-
1.354
1.349
1.202
1.194
1.314
1.319
M2 X 0.4
4g6g
1.721
1.716
1.548
1.538
M2.5 X 0.45
4g6g
2.188
2.183
M3 X 0.5
4g6g
~.:::=:
~~
M3.5 X 0.6
:...r~J:
VI
~~
~:::!
.,o
.,z
~J>
"'O
Gl::C
~~
~
z
-<
0
I
"'
g
z
Gl
!ill
~0
z
""~
NOT
NOT
z
0
~
::tl
0
00
91~
§
~
GO
Major
Diam.
Minor
Diam.
~~
(/)
Pilch
Diam.
Pitch
Oiam.
::::0,:....:.
HI
GO
z<£)
l>co
r-"'
Z Plain Gages for
Minor Diam.
Major
Diam.
Minor
Diam.
oo
~~
0.:_.
X ThYead Gages
Pitch
Diam.
g:~
~s:
nm
>to
z ....
z:..
M8 X 1.25
4g6g
M8X1
-
4g6g
-
See Notes at end of table.
7.160
7.152
6.619
6.606
7.085
7.093
6.835
6.848
7.972
7.969
7.760
7.763
7.324
7.316
6.891
6.878
7.253
7.261
7.053
7.066
7.974
7.971
7.794
7.797
-
~G)
7.598
7.585
7.348
7.340
6.647
6.650
6.912
6.909
6H
8.013
7.188
7.196
8.000
8.013
7.350
7.358
7.700
7.687
7.500
7.492
6.917
6.920
7.153
7.150
6H
8.000
s:::
:c>
-o
nm
s:;:C/l
(/))>
nZ
:cO
mGl
-
:E)>
-jG>
:r::02
mGl
l>-n
oo
C/l:C
~~~
ttl
ecr>
g.~~
:s::o
ml>
::srnm
~~~
-lG)
~~~
:2m
?5:§§1
GAGES fOI{ STANDARD THREAD SEIR!iES, CtASS!ES 4g6g A~JD 6H
M PROiFU.t SGUW THRIEADS - UM!JS Oif SiZU: (CONT'O}
:s::l>z
Gages for External Threads
Qo
ml>
TABU 12
.3~~
l!
<JCII
(J)0
[~
~m
r
§
X Thread Gages
~
GO
'"
en
zen
0 0
~
Pitch
Nominal Si2e
and Pitch
dass
1
Z Plain Gages for
Major D!am.
LO
Diam.
Minor
Diam.
Pilch
Diam.
Minor
Diam.
-o~z
2
3
4
5
M10 X 1.5
4g6g
8.994
8.986
8.344
8.329
M10 X 1.25
4g6g
9.160
9.152
M10 X0.75
4g6g
M12 X 1.75
GO
:z:O
:::c.,
Z Plain Gages for
Minor Diam.
Hi
Major
Diam.
Pitch
Diam,
M;~jor
GO
NOT
GO
Diam.
Pitch
Diam.
6
7
8
9
10
11
i2
8.909
8.917
6.609
8.624
9.966
9.965
9.732
9.735
10.000
10.015
9.026
9.034
9.506
9.491
8.619
8.606
9.085
9.093
8.835
8.848
9.972
9.969
9.760
9.763
10.000
10.013
9.188
9.196
9.491
9.466
9.166
9.156
9.428
9.433
9.278
9.268
9.978
9.975
9.838
9.841
10.000
10.010
4g6g
10.829
10.821
10.071
10.056
10.734
10.742
10.384
10.399
11.966
11.963
11.701
11.704
M12 X 1.25
4g6g
11.160
11.152
10.619
10.606
11.075
11.083
10.725
10.738
11.972
11.969
M12X 1
(Note 1)
4g6g
11.324
11.316
10.891
10.878
11.249
11.257
11.049
11.062
M14X2
4g6g
12.663
12.655
11.797
11.782
12.563
12.571
12.163
12.178
:o.=.-:.
0 0
~!2
X Thread Gages
~
§;~
Gages for Internal Threads
~0
o:::c
(J)
NOT
GO
GO
Class
13
14
15
9.206
9.198
8.376
8.379
8.676
8.673
6H
9.598
9.585
9.348
9.340
8.647
8.650
8.912
8.909
GH
9.513
9.518
9.795
9.785
9.645
9.640
9.186
9.191
9.378
9.375
6H
12.000
12.015
10.863
10.871
11.413
11.398
11.063
11.055
10.106
10.109
10.441.
10.438
6H
11.760
11.763
12.000
12.013
11.188
11.196
11.618
11.605
11.368
11.360
10.647
10.650
10.912
10.909
6H
11.974
11.971
11.794
11.797
12.000
12.013
11.350
11.358
11.710
11.697
11.510
11.502
10.917
10.920
11.153
11.150
6H
13.962
13.959
13.682
13.685
14.000
14.015
12.701
12.709
13.313
13.298
12.913
12.905
11.835
11.838
12.210
12.207
6H
I
0~
_m-~
~"'
=t~
..,;c::i
.!..?;
~a
~z
:!~
~~
~>
N(')
Gl:I:
~~
8
"'
~
M14 X 1.5
i
M15 X 1
"'
6
c
M16X2
~
§
~
12.994
12.986
12.344
12.329
12904
12.912
12.604
12.619
13.968
13.965
13.732
13.735
14.000
14.015
13.026
13.034
13.516
13.501
13.216
13.208
12.376
12379
12.676
12.673
6H
4g6g
14.324
14.316
13.891
13.878
14.249
14.257
14.049
14.062
14.974
14.971
14.794
14.797
15.000
15.013
14.350
14.358
14.710
14.697
14.510
14.502
13.917
13.920
14.153
14.150
6H
4g6g
14.663
14.655
13.797
i3.782
14.563
14.571
14.163
14.178
15.962
15.959
15.682
15.685
16.000
16.015
14.701
14.709
15.313
15.298
14.913
14.905
13.835
13.838
14.210
14.207
6H
4g6g
@
~0
~
~
)>
- -
See Notes at end of table.
~---
----
-
-
s:m
:D
~)>
zz
(J)
z-
~~
-(J)
Os:::
Zm
~~
(J)·
:;;!a;
zS:::
C.!.
l>co
:Dm
0~
Z"llD
~i~.
~~~
a2oo
O:i:~
~<nm
0::-
~
~
)>)>
~
zz
~!~
~~~
<Oo-
r:n
)>-
TAIU!E 12
-c,;
[;
[~
~m
I
i
B
s:~
GAGiES FOilt STANIDA!(D THREAD SR:RiiES, C!LASSiE§ 4g6g AND ~!I-ll
M !PIROFH.~ SCREW THIRfADS- UMUTS OIF SIZE (CONT'D)
nl!fj
:::s:
C'Jm
)>CD
z~
Gages for lnterna! Threads
Gages for External Threads
z:....
)>en
~
a3
<n
Z Plain Gages for
Major Diam.
11..0
GO
:;:
::is
X Thread Gag!!s
X Thread Gages
Z Plain Gages for
Minor Diam.
HI
GO
o.:.
Zw
)>co
r.p.
r:n
Nominal Size
and Pilch
l'it.:h
Class
Diam.
Minor
Diam.
Pile!!
Diam.
Minor
Diam.
GO
NOT
GO
Majer
Diam.
Pitch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT
GO
Class
~
z
0
)>
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M16 X 1.5
4g6g
14.994
14.986
14.344
14.329
14.904
14.912
14.604
14.619
15.968
15.963
15.732
15.735
16.000
16.015
15.026
15.034
15.516
15.501
15.216
15.208
14.376
14.379
14.676
14.673
6H
M17 X 1
4g6g
16.324
16.316
15.891
15.878
16.249
16.257
16.049
16.062
16.974
16.971
16.794
16.797
17.000
17.013
16.350
16.358
16.710
16.697
16.510
16.502
15.917
15.920
16.153
16.150
6H
M18 X 1.5
4g6g
16.994
16.986
16.344
16.329
16.904
16.912
16.604
16.619
17.968
17.963
17.732
17.735
18.000
18.015
17.026
17.034
17.516
17.501
17.216
17.208
16.376
16.379
16.676
16.673
6H
4g6g
18.334
18.326
17.251
17.236
18.228
18.236
17.728
17.743
19.958
19.955
19.623
19.626
20.000
20.015
16.376
16.384
19.100
19.085
18.600
18.592
17.294
17.297
17.744
17.741
6H
1
ZtnO
~&~
Slc
[i
~m
::ll
Cl
0'\'
0
M20 X 2.5
I
~~
M20 X 1.5
4g6g
18.994
18.986
18.344
18.329
18.904
18.912
18.604
18.619
19.968
19.965
19.732
19.735
20.000
20.015
19.026
19.034
19.516
19.501
19.216
19.208
18.376
18.379
18.676
18.673
6H
~~
NO
Nz
::tF=
M20 X 1
4g6g
19.324
19.316
18.891
18.878
19.249
19.257
19.049
19.062
19.974
. 19.971
19:794
19.797
20.000
20.013
19.350
19.358
19.710
19.697
19.510
19.502
18.917
18.920
19.153
19.150
6H
M22 X 1.5
4g6g
20.994
20.986
20.344
20.329
20.904
20.912
20.604
20.619
21.968
21.965
21.732
21.735
22.000
22.015
21.026
21.034
21.516
21.501
21.216
21.208
20.376
20.379
20.676
20.673
6H
M24 X3
4g6g
22.003
21.993
20.704
20.686
21.878
21.888
21.278
21.296
23.952
23.949
23.577
23.580
24.000
24.018
22.051
22.061
22.916
22.898
22.316
22.306
20.752
20.755
21.252
21.249
6H
22.663
22.655
21.797
21.782
22.557
22.565
22.157
22.172
23.962
23.959
23.682
23.685
24.000
24.015
22.701
22.709
23.325
23.310
22.925
22.917
21.835
21.838
22.210
22.207
6H
-G)
23.994
23.966
23.344
23.329
23.899
23.907
23.599
23.614
24.968
24.965
24.732
24.735
25.000
25.015
24.026
24.034
24.526
24.511
24.226
24.218
23.376
23.379
23.676
23.673
6H
s:r:n
r:n)>
nZ
'fz
::r~
N(")
Gl:C
s:z
-<m
8s:
~
-<
~
~
~
M24 X 2
4g6g
"'(§
c:
z
Gl
M25 X 1.5
4g6g
@
~0
z
/i!
s:
"'
-
See Notes at end of table.
--
s:
mGl
il>
nm
::oO
'-------
mG)
:E;p
-!G)
:r::llz
mGl
)>-n
oo
Ul::ll
Z"DO
o a o
a :'f.~
l~~
a~~
o:x=:
=wrn
S:Cl
~~~
m)>
-lC)
[W~
:!:1m
(")(()
~§g
:::r til Ill
<eo"~
TABU 12
i;
[~
GAGtS fOR SIANDA!RD lliiRiEAD StiiU!ES, ClASSES 4g6g AND 6H
M PROf!!..&: SCREW THREADS-IUM!TS OF SIZE (CONT'D)
$~
(()Cl
gG>
:;m
r
Gages for !External Th~eads
r
GO
'l:
:;ECl
-~z
X Thread Gages
X Thread Gages
~
m)>
Gages lor ln!erna! Threads
Z Plain Gages !or
Major Diam.
1.0
GO
ze>
:o..,
Z Plain Gages for
Minor Diam.
HI
mo
~:0
rn
(/)
Class
1
M27 X 2
zrn
0
0
~~
:::0,.:..:.
Pitch
Nominal Size
and l!'i~ch
NOT
GO
Major
Diam.
7
8
25.157
25.172
26.962
29.959
Diam.
Minor
Diam.
Pikn
Diam.
Minor
Diam.
GO
2
3
4
5
6
4g6g
25.663
25.655
24.797
14.782
25.557
25.565
Diarn.
Major
Diam.
Pitch
Diam.
GO
GO
Class
9
10
11
12
13
14
15
26.682
26.685
27.000
27.015
25.701
25.709
26.325
26.310
24.835
24.838
25.110
15.207
6H
25.917
Pilch
I 25.925
NOT
M30 X 3.5
4g6g
27.674
27.664
26.158
26.140
27.542
27.552
26.842
26.860
29.947
29.944
29.522
29.525
30.000
30.018
27.727
27.737
28.707
28.689
28.007
27.997
26.211
26.214
26.771
26.768
6H
M30 X 2
4g6g
28.663
28.655
27.797
27.782
28.557
28.565
28.157
28.172
29.962
29.959
29.682
29.685
30.000
30.015
28.701
28.709
29.325
29.310
28.925
28.917
27.835
27.838
28.210
28.207
6H
M30 X 1.5
4g6g
28.994
28.986
28.344
28.329
28.899
28.907
28.599
28.614
29.968
29.965
29.732
29.735
30.000
30.015
29.026
29.034
29.526
29.511
29.226
29.218
28.376
28.379
28.676
28.673
6H
M33 X 2
4g6g
31.663
31.655
30.797
30.782
31.557
31.565
31.157
31.172
32.962
32.959
32.682
32.685
33.000
33.015
31.701
31.709
32.325
32.310
31.925
31.917
30.835
30.838
31.210
31.207
6H
M36 X 4
4g6g
33.342
33.332
31.610
31.592
33.202
33.212
32.402
32.420
35.940
35.937
35.465
35.468
36.000
36.018
33.402
33.412
34.502
34.484
33.702
33.692
31.670
31.673
32.270
32.267
6H
M36 X2
4g6g
34.663
34.655
33.797
33.782
34.557
34.565
34.157
34.172
35.962
35.959
35.682
35.685
36.000
36.015
34.701
34.799
35.325
35.310
34.925
34.917
33.835
33.838
34.210
34.207
6H
0\
i~
•"'
~ffi
o"'
~..!:
::::~
~6
_,.
"'z
:..o.r
~~
Gl::C
"'"
~~
"
~
;g
z
-<
4g6g
37.663
37.655
36.797
36.782
37.557
37.565
37.157
37.172
36.962
38.959
38.682
38.685
39.000
39.015
37.701
37.709
38.325
38.310
37.925
37.917
36.835
36.838
37.210
37.207.
6H
8
M40 X 1.5
4g6g
38.994
38.984
38.344
38.329
38.899
38.889
38.599
38.614
39.968
39.964
39.732
39.736
40.000
40.015
39.026
39.036
39.526
39.511
39.226
39.216
38.376
38.380
38.676
38.672
6H
~c:
M42 X 4.5
4g6g
39.014
39.001
37.065
37.045
38.864
38.877
38.064
38.084
41.937
41.933
41.437
41.441
42.000
42.020
39.077
39.090
40.292
40.272
39.392
39.379
37.129
37.133
37.799
37.795
6H
:ll
~
~
z
Gl
(§)
~0
~
~
See Notes at end of table.
z
)>
M39 X 2
0
)>
s:m
::0
n
)>)>
zz
(/l
z-
~~
-Cil
os:
~m
rro
m:-'"
~a;
zS:
o..:..
)>(p
:OCX)
0-1>
Ui
§_~~
§53ffi
)!>)>
;g_~
22
[.~~
<>o-
s:);;
i~~
)!>!!!
JAB if 12
~~
~;
[~
§.m
=:s:
nm
~~
Gages fm lniema! iihre<~ds
Gages for E:;temal Threads
l
mtll
GAGES fOR STANDA..RD Tll-m..EAD SERIES,. O.ASSES 4g6g AN [!I 61!-'3
M PIROflilE SCREW JHRIEA.DS-UMnS Of SIZE {CONlf'D)
z:..
J>m
ia
X Thread Gages
GO
:;
:;:
"'
I
::!S:
X Thread Gages
Z Plain Gages lor
Major Diam.
1..0
GO
o.:..
2co
Z Plain Gages ior
Minor Diam.
HI
Class
Diam.
Minor
Diam.
Diam.
Minor
Diam.
GO
NOT
GO
Major
Diam.
!'itch
Diam.
Major
Diam.
l'i!ch
Diam.
GO
NOT
GO
Class
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M42X 2
4g6g
40.663
40.653
39.797
39.782
40.557
40.567
40.157
40.172
41.962
41.958
41.682
41.686
42.000
42.015
40.701
40.711
41.325
41.310
40.925
40.915
39.835
39.839
40.210
40.206
6H
M45 X 1.5
4g6g
43.994
43.984
43.344
43.329
43.899
43.909
43.599
43.614
44.968
44.964
44.732
44.736
45.000
45.015
44.026
44.036
44.526
44.511
44.226
44.216
43.376
43.380
43.676
43.672
6H
M48X5
4g6g
44.681
44.668
42516
42.496
44.521
44.534
43.521
43.541
47.929
47.925
47.399
47.403
48.000
48.020
44.752
44.765
46.087
46.067
45.087
45.074
42.587
42.591
43.297
43.293
6H
M48X 2
4g6g
46.663
46.653
45.797
45.782
46.551
46.561
46.151
46.166
47.962
47.958
47.682
47.686
48.000
48.015
46.701
46.711
47.337
47.322
46.937
46.927
45.835
45.839
46.210
46.:!06
6H
M50 X 1.5
4g6g
48.994
48.984
48.344
48.329
48.894
48.904
48.594
48.609
49.968
49.964
49.732
49.736
50.000
50.015
49.026
49.036
49.538
49.523
49.238
49.228
48.376
48.380
48.676
48.672
6H
M55 X 1.5
4g6g
53.994
53.984
53.344
53.329
53.894
53.904
53.594
53.609
54.968
54.964
54.732
54.736
55.000
55.015
54.026
54.036
54.538
54.523
54.238
54.228
53.376
53.380
53.676
53.672
6H
n
M56 X 5.5
4g6g
. 49.970
49.950
52.183
52.196
51.083
51.103
55.925
55.921
55.365
55.369
56.000
56.020
52.428
52.441
53.883
53.863
52.783
52.770
50.046
50.050
50.796
50.792
6H
~
52.353
52.340
M56X2
4g6g
54.663
54.653
53.797
53.782
54.551
54.561
54.151
54.166
55.962
55.958
55.682
55.686
56.000
56.015
54.701
54.711
55.337
55.322
54.937
54.927
53.835
53.8)9
54.210
54.206
6H
Nominal Size
and Pitch
1
a=w
~i
;JJ,:...:,
0\
N
1
Pilch
oO
~~
~~
~~
~-
.!..~
~:::1
.,o
_,.
.,z
~·
!!?~
~>
"'O
G) :I:
~~
g
~
~
~
~
c
z
G>
M60 X 1.5
M64X6
4g6g
4g6g
58.994
58.984
60.023
60~010
::;
~,.
:13
0
g;
!!jGl
®
z
0
z
Pitch
r.,_
~2
g
l>oo
58.344
58.329
57.425
57.402
58.894
58.904
58.594
58.609
59.968
59.964
59.843
59.856
58.643
58.620
63.920
63.916
--
See Notes at end of table.
59.732
59.736
60.000
60.015
59.026
59.036
59.538
59.523
59.238
59.228
58.376
58.380
63.320
63.324
64.000
64.023
60.103
60.116
61.678
61.655
60.478
60.465
57.505
57.509
---·-
-
I
58.676
58.672
6H
58.305
58.301
6H
:lll>
()Gl
m
g;tll
til)!>
n2
;:gO
me;)
-~-
~)>
... G)
::t::12
me;)
)>.,
00
tll:ll
ZUC')
'" a o
] tl
~~~
O:I:~
::~
"'m
S::C>
f;i
(") (/)
~ [~
~)>
::OC>
_m
§rfilEi
<Co-
TAJRE 12
l!
[~
~m
GAG!:.S iFOI(-SlANDARD fHREAD SIER!IES, Cll.AS§!ES 4g6g AND 6H
M PROiFili: SCREW THREADS- !IJMrfS Of StltE {CONT'D)
Gages for ht<ernaiYhreads
~
~
a3
:;:
:cC>
ml>
::§:C>
--12
::x:C>
)( Thread Gages
Z Plain Gages for
Major Diam.
LO
GO
z
f./'JO
(")
Gages for intemal Threads
X Thread Gages
~
s:,:l>
GO
~.,
)>0
Z Plain Gages for
Minor Diarn.
i-!1
0::0
(/'J
en
zen
9.~
Q'R
e::
GO
Major
Diam.
Pitch
Diam.
Major
Diam.
Piich
Oiam.
GO
GO
Class
7
8
9
10
11
12
13
14
15
62.151
62.166
63.962
63.958
63.682
63.686
64.000
64.015
62.701
62.711
63.337
63.322
62.937
62.927
61.835
61.839
62.210
62.206
6H
63.894
63.904
63.594
63.609
64.968
64.963
64.732
64.737
65.000
67.015
64.026
64.036
64.538
64.523
64.238
64.228
63.376
63.380
63.676
63.67:2
6H
68.344
68.329
68.894
68.904
68.594
68.609
69.968
69.963
69.732
69.737
70.000
70.015
69.026
69.036
69.538
69.523
69.238
69.228
68.376
68.381
68.676
68.671
6H
68.023
68.010
65.425
65.402
67.843
67.856
66.643
66.666
71.920
71.915
71.320
71.325
i2.000
72.023
68.103
68.116
69.678
69.655
68.478
68.465
65.505
65.510
66.305
66.300
6H
4g6g
70.663
70.653
69.797
69.782
70.551
70.561
70.151
70.166
71.962
71.957
71.682
71.687
72.000
72.015
70.701
70.711
71.337
71.322
70.937
70.927
69.835
69.840
70.210
70.205
6H
M75 X 1.5
4g6g
73.994
73.984
73.344
73.329
73.894
73.904
73.594
73.609
74.968
74.963
74.732
74.737
75.000
75.015
74.026
74.036
74.538
74.523
74.238
74.228
73.376
73.381
73.676
73.671
6H
M80X 6
4g6g
76.023
76.010
73.425
73.402
75.843
75.856
74.643
74.666
79.920
79.915
79.320
79.325
80.000
80.023
76.103
76.116
77.678
77.655
76.478
75.465
73.505
7-3.510
74.305
74.300
6H
l>
M80X 2
4g5g
78.663
78.653
77.797
77.782
78.551
78.561
78.151
78.165
79.962
79.957
79.682
79.687
80.000
80.015
78.701
78.711
79.337
79.322
78.937
78.927
77.835
77.840
7_8.210
78.205
6H
s:m
78.994
78.984
78.344
78.329
78.894
78.904
78.594
78.609
79.968
79.963
79.732
79.737
80.000
80.015
79.026
79.036
79.538
79.523
79.238
79.228
78.375
78.381
78.676
78.671
6H
Nominal Size
and Pitch
Minor
Diam.
Pitch
Oiam.
Minor
Class
l'itd-a
Diam.
Diam.
GO
1
2
3
4
5
6
M64 X 2
4g6g
62.663
62.653
61.797
61.782
62.551
62.561
M65 X 1.5
4g6g
63.994
63.984
63.344
63.329
M70 X 1.5
4g6g
68.994
68.894
M72 X 6
4g6g
M72 X2
."'
~'§
NOT
NOT
"-a.
0"'
~~
'fz
=~
~g
~)>
:.:..r«>S:
:.:..;>
Cil:;
"'"
s:z
-im
"~
~
~
~
!
~
~c
z
M80 X 1.5
M85X 2
4g6g
4g6g
GJ
@
~
~
)>
--
See Notes at end of table.
83.663
83.653
82.797
82.782
---
83.551
83.561
83.151
83.166
I
84.962
84.957
84.682
84.687
------
85.000
85.015
----
83.701
83.711
- - -
84.337
84.322
--
83.937
83.927
82.835
82.840
83.210
83.205
- -
z
l>
:c
nl>
~t;
~~
=l(h
6H
os:
Zm
~~
Ch:...
);!a.~
zS:
o.:...
l>co
:CCI)
O.r>o
5=:P~
~ ~~·
0
c..:::-
~~~
o:z:s:
)>)>
~ ~~
zz
en
..... ::I%.
~~!.
)>-
;&gg
s:);;
15~
~s:
men
tE~:!!..
~~
:l.s:
TABU: 12
(")m
GAGES FOR STANDAlRD TIHlRMD SIERDES, CLASSES 4g6g AND 6H
)>Ill
:z~
M PROHUE SCREW THREADS-UMITS Of SIZE (CONT'D}
~m
~
Gages for hlernal Threads
B
~
X Thread Gages
X Thread Gages
~
GO
I
Gages for Internal ihll'eads
fJ
Z Plain Gages ior
Major Diam.
1.0
Z Plain Gages for
l-1!
GO
z:..
l>m
::!S:
Minov Diam.
0.!,.
z~
,.,.
I
l>co
I
en
);!
z
0
Major
Diam.
Pitch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT
GO
Class
8
9
10
11
12
13
14
15
89.920
89.915
89.320
89.325
90.000
90.023
86.103
86.116
87.678
87.655
86.478
86.465
83.505
83.510
84.305
84.300
6H
88.151
88.166
89.962
89.957
89.682
89.687
90.000
90.015
88.701
88.711
89.337
89.322
88.937
88.927
87.835
87.840
88.210
88.205
6H
93.545
93.555
93.145
93.160
94.962
94.957
94.682
94.687
95.000
95.015
93.701
93.711
94.351
94.336
93.951
93.941
92.835
92.840
93.210
93.205
6H
93.425
93.402
95.833
95.846
94.633
94.656
99.920
99.915
99.320
99.325
100.000
100.023
96.103
96.116
97.703
97.680
96.503
96.490
93.505
93.510
94.305
94.300
6H
98.663
98.653
97.797
97.782
98.545
98.555
98.145
98.160
99.962
99.957
99.682
99.687
100.000
100.Q15
98.701
98.711
99.351
99.336
98.951
98.941
97.835
97.840
98.210
98.205
6H
4g6g
103.663
103.648
102.797
102.774
103.545
103.560
103.145
103.168
104.962
104.957
104.682
104.687
105.000
105.023
103.701
103.716
104.351
104.328
103.951
103.936
102.835
102.840
103.210
103.205
6H
M110X2
4g6g
108.663
108.648
107.797
107.774
108.545
108.560
108.145
108.168
109.962
109.957
109.682
109.687
110.000
110.023
108.701
108.716
109.351
109.328
108.951
108.936
107.835
107.840
108.210
108.205
6H
!~
M120 X 2
4g6g
118.663
118.648
117.797
117.774
118.545
118.560
118.145
108.168
119.962
119.956
119.682
119.688
120.000
120.023
118.701
118.716
119.351
119.328
118.951
118.936
117.835
117.841
118.210
118.204
6H
~
M130 X 2
ZU>
2.2.
-~
Qo
~
Pitch
Diam.
Minor
Diam.
GO
NOT
GO
4
5
6
i
86.023
86.010
83.425
83.402
85.843
85.856
84.643
84.666
4g6g
88.663
88.653
87.797
87.782
88.551
88.561
M95 X 2
4g6g
93.663
93.653
92.797
92.782
M100 X 6
4g6g
96.023
96.010
M100 X 2 ·
4g6g
M105 X 2
Nominai Size
and Pit{'h
Class
Pitch
Diam.
1
2
3
M90 X 6
4g6g
M90X 2
Minor
Diam.
I
>
:0
0
::tl,:.:.,
5:~
m"'
.?~
.,m
0~
~-==
~~
~g
.,z
~)>
~·
??S::
~)>
Gl::t:
"'"
~*
"0
s:
~
-<
g
c
~z
~
0
~
s:
mCl
~)>
-Q
(")m
4g6g
. 128.663
128.648
See Notes at end of table.
127.797
127.774
128.545
128.560
128.14~
128.168
129.962
129.956
--
129.682
129.688
130.000
130.023
128.701
128.716
129.351
129.328
128.951
128.936
127.835
127.841
128.210
128.204
6H
s:en
enl>
nZ
:oO
mCl
~)>
-!Cl
:r:oz
mCl
)>'T1
oo
en:o
ZUC')
a
ao
t~!
~~~
~oom
:§:Gl
ml>
;lGl
_m
!a§a
~
~ 0
!H
(")rJl
6~~
:s::t>
2
~~
(J)0
~>
[~
~m
TABU 12
i
Gages for External Threads
I
zcn
=~
flo
0\
V1
~::0
X Thread Gages
Z Plain Gages for
Major Diam.
LO
(J)
Z Plain Gages for
Minor Diam.
HI
GO
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
GO
NOT
GO
Major
Diam.
!'itch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT
GO
Class
1
2
3
4
5
6
7
II
9
10
11
i2
13
14
15
M140 X 2
4g6g
138.663
138.648
137.797
137.774
138.545
136.560
138.145
138.168
139.962
139.956
139.682
139.666
140.000
140.023
138.701
138.716
139.351
139.326
138.951
138.936
137.835
137.841
138.210
136.204
6H
M150 X 2
4g6g
148.663
148.648
147.797
147.774
146.545
146.560
148.145
148.168
149.962
149.956
149.662
149.666
150.000
150.023
148.701
148.716
149.351
149.326
148.951
148.936
147.835
147.641
148.210
148.204
6H
M160 X 3
4g6g
158.003
157.988
156.704
156.676
157.863
157.678
157.263
157.291
159.952
159.946
159.577
159.583
160.000
160.026
158.051
158.066
158.951
158.923
158.351
158.336
156.752
156.756
157.252
157.246
6H
M170 X 3
4g6g
166.003
167.988
.166.704
166.676
167.863
167.678
167.263
167.291
169.952
169.944
169.577
169.565
170.000
170.028
168.051
168.066
168.951
168.923
168.351
166.336
166.752
166.760
167.252
167.244
6H
M180 X 3
4g6g
178.003
177.988
176.704
176.67&
177.663
177.876
177.263
177.291
179.952
179.944
179.577
179.565
180.000
160.026
178.051
178.066
178.951
178.923
176.351
178.336
176.752
176.760
177.252
177.244
6H
M190 X 3
4g6g
188.003
187.988
186.704
186.676
187.843
187.858
187.243
187.271
189.952
189.944
189.577
169.585
190.000
190.028
188.051
188.066
186.986
166.956
168.366
166.371
166.752
186.760
187.252
167.244
6H
196.003
197.986
. 196.704
196.676
197.843
197.858
197.243
197.271
199.952
199.944
199.577
199.565
200.000
200.026
196.051
198.066
196.966
196.956
-
196.366
196.371
196.752
196.760
197.252
197.244
6H
.!..~
z:j
_,.
::o.,
mo
Class
g:=:
"'-
:cGl
Nominal Size
and Pitch
:0,:..:.,
~~
~~
~~
-iz
Gages for Internal Threads
X Thread Gages
GO
QGl
ml>
GAGES FOR STANDARD THR:EAD SiERJES, ClASSES 4g6g AND 6H
M PROFILE SCREW THREADS- UMITS OF SIZE (CONT'D)
~a
~z
~·
~~
~"
Gl:I:
~~
8
;::
;';
z
-<
M2'JO X 3
~
GENERAL NOTE: All GO gages for external threads are the same as 6g sizes.
~
c:
z
Gl
@
~0
z
~
z
l>
~
~
I
l>
4g6g
NOTE:
(1) M14 x 1.25 -special threads for spark plugs only. See applicable document for thread tolerance class and limiting dimensions.
m
::0
nl>
l>z
zrJ>
z-
l>'
-tl>
-(J)
os:
Zm
~~
rJl:...
;t;!a.
z:S:
o..:....
l>co
::nco
0.,.
z-on
o
ao
tt~
ft~[i;
o:;:;:
=wm
)>)>
Hf
22
(/)
)>-
g_g g·
s:):;
~:::.=
c5~!:L
mC/l
]~
2:1s;
~>
TABU: 13
[~
~m
[
nm
SEHiNG GAGES fOR STANDARD THREAD StR~ES, ClASSES 4g6g AND liH
M PROF! liE- liMITS Of SIZE
)>OJ
2_
z:...
)>a>
W Thread-Setting Plugs
m
~
~
to
GO
:;:
::!!\':
W Thread-Selting Rings
GO
o..:..
Zc:o
)>co
HI
r~
en
(/)
Major Diam.
Major Oiam.
:;;!
z
zoo
~~
."'
~~
"'"'
Nominal Size
and Piach
Class
Truncated
1
2
M1.6 X 0.35
4g6g
Full
form
Pitch
Oiam.
Truncated
3
4
5
1.424
1.416
1.581
1.589
full
Form
Pitch
Diam.
Pitch
Oiam.
Minor
Oiam.
Pitch
Dlam.
Minor
Diam.
Ciass
6
7
8
9
10
1l
12
13
1.354
1.351
1.384
1.376
1.573
1.565
1.314
1.317
. ..
...
. ..
. ..
...
. ..
. ..
. ..
. ..
M2X0.4
4g6g
1.801
1.793
1.981
1.989
1.721
1.718
1.759
1.751
1.981
1.973
1.679
1.682
...
...
. ..
...
. ..
. ..
...
. ..
. ..
. ..
M2.5 X 0.45
4g6g
2.278
2.270
2.480
2.488
2.188
2.185
2.233
2.225
2.480
2.488
2.143
2.146
...
...
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
4g6g
2.755
2.747
2.980
2.988
2.655
2.652
2.707
2.699
2.980
2.988
2.607
2.610
. ..
...
...
...
~~
.,a
.,z
M3.5 X 0.6
4g6g
3.209
3.201
3.479
3.487
3.089
3.086
3.156
3.148
3.479
3.487
3.036
3.039
...
...
...
. ..
. ..
. ..
. ..
. ..
"'C"l
M4X0.7
3.663
3.655
3.978
3.986
3.523
3.520
3.607
3.599
3.978
3.986
3.467
3.470
...
...
. ..
...
. ..
. ..
..
. ..
. ..
. ..
~"'
-=
\"z
~~
~~
G) I
4g6g
s::z
-lm
"
. ..
.
0
. ..
M3 X 0.5
~m
~
::0
0
s:
~
-<
M5 X 0.8
4g6g
4.616
4.608
4.976
4.984
4.456
4.453
4.556
4.548
4.976
4.984
4.396
4.399
4.480
4.483
4.134
4.126
4.605
4.602
4.334
4.329
6H
I
M6X1
4g6g
5.524
5.511
5.974
5.987
5.324
5.321
6.174
6.161
5.974
5.987
5.253
5.256
5.350
5.353
4.917
4.904
5.500
5.497
5.153
5.140
6H
g
M8 X 1.25
z
- - -
Gl
@
!5
z
i
mG.l
;j)>
-G)
Om
OJ
6c
!\':
4g6g
See Notes at end of table.
7.410
7.397
7.972
7.985
7.160
7.157
7.335
7.322
_L___
7.972
7.985
7.085
7.088
7.188
7.191
6.647
6.634
..
7.348
7.345
'-
6.912
6.899
6H
!\':(/)
(/))>
n'
::oO
~~
-rG.l
::1:-
::o'
mG.l
)>-n
00
Ul::O
&~~
~ ll
~~~
o:::r::~
:l(l);n
:S:CJ
ml>
-!CJ
;~a:
~~~
~m
!::8~
~~~
(")(/)
l!
:s;l>
2
[~
TABlE 13
~m
[
r
~
W Thread-Setting Plugs
GO
~
(/)0
SETTiNG GAGIES fOR STANDARD THREAD SERBfS, CLASSES 4g6g AND 6H
M PROFil..iE-UivUTS OF sm: (CONT'D}
gCJ
ml>
:E9
-12
W Thread-Si!lting Rings
co
lO
J:CJ
~..,
)>0
0:::0
HI
(/)
Major Oiam.
Major Diam.
Nominal Size
and Pitch
Class
Truncated
Full
form
!'itch
Diam.
Truncated
full
Form
Pitch
Diam.
Pitch
Diam.
Minor
Oiam.
Pitch
Diam.
Minor
Diam.
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
M8X1
4g6g
7.524
7.511
7.974
7.987
7.324
7.321
7.453
7.440
7.974
7.987
7.253
7.256
7.350
7.353
6.917
6.904
7.500
7.497
7.153
7.140
6H
M10 x 1.5
4g6g
9.294
9.281
9.968
9.981
8.994
8.991
9.209
9.196
9.968
9.981
8.909
8.912
9.026
9.029
8.376
8.363
9.206
9.203
8.676
8.663
6H
M10 X 1.25
4g6g
9.110
9.397
9.972
9.985
9.160
9.157
9.335
9.322
9.972
9.985
9.085
9.088
9.188
9.191
8.647
8.634
9.348
9.345
8.912
8.899
6H
M10 X 0.75
4g6g
9.641
9.633
9.978
9.986
9.491
9.488
9.578
9.570
9.978
9.98E:;
9.428
9.431
9.513
9.516
9.188
9.180
9.645
9.642
9.378
9.370
6H
M12 X 1.75
4g6g
11.179
11.164
11.966
11.981
10.829
10.826
11.084
11.069
11.966
11.981
10.734
10.731
10.863
10.866
10.106
10.091
11.063
11.060
10.441
10.426
6H
M12 X 1.25
4g6g
11.410
11.397
11.972
11.985
11.160
11.157
11.325
11.312
11.972
11.985
11.075
11.078
11.188
11.191
10.647
10.634
11.368
11.365
10.912
10.899
6H
~
M12 X 1
(Note 1)
4g6g
11.524
11.511
11.974
11.987
11.324
11.321
11.449
11.436
11.974
11.987
11.249
11.252
11.350
11.353
10.917
10.904
11.510
11.507
11.153
11.140
6H
I
M14 X 2
4g6g
13.063
13.048
13.962
13.977
12.663
12.658
12.963
12.948
13.962
13.977
12.563
12.568
12.701
12.706
11.835
11.820
12.913
12.908
12.210
12.195
6H
13.294
13.281
13.968
13.981
12.994
12.990
13.204
13.191
13.968
13.981
12.904
12.900
13.026
13.030
12.376
12.363
13.216
13.212
12.676
12.663
6H
zen
g_Q.
~~
:;o
;:o.:.:.
gS!
~~
a.
~
"~
~~
~~
,a
,z
~»
:.l'
~~
~)>
"O
'"''
~~
~
~
~c:
M14 X 1.5
4g6g
z
£5
~0
z
)>
~
-
See Notes at end of table.
·--
-
-.
---~
~~--·-
'--
--
-
-
~
)>
s:m
:::0
n>
)>2
2(/l
z>'
::!6;
os:
2m
~'::!
(/)•
-~­
)>Ol
zS:
o.:..
:l>m
:Oc:o
0.:>
zvn
~a g_~l1§.
~~~
g~~
)>)>
Q§s
zz
~~~
(J)
)>-
g_£§'
s:J;;
m(J)
.g·~ ~
~~
TABlE 13
~>
"en
a.;::
~m
i
::Es;
nm
SETTING GAGiES FOR STANDARD THREAD SERIES, ClASSES 4g6g AN!D 6H
M PROFH..E- UMITS Of SIZE (CONT'D)
)>OJ
z_.
z:...
)>C)
W Thread-Setting Plugs
~·
a
GO
3
:;:
en
GO
LO
Major Diam.
::iS::
W Thread-Setting Rings
o..:...
Zc.o
)>a;,
r.,.
~z
HB
Major Diam.
Full
Nominal Size
and Pitch
Class
Truncated
Full
Form
Pitch
Diam.
Trum:alecl
Form
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
Pitch
Oiam.
Minor
Diam.
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
M15 X 1
4g6g
14.524
14.511
14.974
14.987
14.324
14.320
14.449
14.436
14.974
14.987
14.249
14.253
14.350
14.354
13.917
13.904
14.510
14.506
14.153
14.140
6H
M16 X 2
4g6g
15.063
15.048
15.962
15.977
14.663
14.658
14.963
14.948
15.962
15.·977
14.563
14.568
14.701
14.706
13.835
13.820
14.913
14.908
14.210
14.195
6H
M16 X 1.5
4g6g
. 15.294
15.281
15.968
15.981
14.994
14.990
15.204
15.191
15.968
15.981
14.904
14.908
15.026
15.030
14.376
14.363
15.216
15.212
14.676
14.663
6H
M17 X 1
4g6g
16.524
16.511
16.974
16.987
16.324
16.320
16.449
16.436
16.974
16.987
16.249
16.253
16.350
16.354
15.917
15.904
16.510
16.506
16.153
16.140
6H
M18 X 1.5
4g6g
17.294
17.281.
17.968
17.981
16.694
16.690
17.204
17.191
17.968
17.981
16.904
16.908
17.026
17.030
16.376
16.363
17.216
17.212
16.676
16.663
6H
M20 X 2.5
4g6g
18.834
18.819
19.958
19.973
18.334
18.329
18.728
18.713
19.958
19.973
18.228
18.233
18.376
18.381
17.294
17.279
18.600
18.595
17.744
17.729
6H
M20 X 1.5
4g6g
19.294
19.281
19.968
19.981
18.994
18.990
19.204
19.191
19.968
19.981
18.904
18.908
19.026
19.030
18.376
18,363
19.216
19.212
18.676
18.663
6H
~
g
M20 X 1
4g6g
19.524
19.511
19.973
19.986
19.324
19.320
19.449
19.436
19.973
19.986
19.249
19.253
19.350
19.354
18.917
18.904
19.510
19.506
19.153
19.140
6H
~
M22 X 1.5
4g6g
20.834
20.821
21.968
21.981
20.994
20.990
21.204
21.191
21.968
21.981
20.904
20.908
21.026
21.030
20.376
20.363
21.216
21.212
20.676
20.663
6H
zen
e.~
g'j:f
~~
0"'
m"'
"""'
~~
Q\
00
~
:0
0
\"z
~;;
.,o
.,z
~,.
::;.r
~~
"'"
;::z:
G) ::I:
-<m
~
~
-<
0
"'
Rl
c
z
Gl
@
z
~
6
!,.
See Notes at end of table.
I
s
!:!:lGJ
:ol>
nm
s(J)
(/))>
nZ
:oO
mCl
:E)>
-I.G')
::I:-
:oz
mGJ
)>"T!
00
(/):0
~
'"'
~~~
"'5l g-,Cl
0
Q.,.
~~~
6".S:s:
:::1
rnm
Q§a
Q. 0
$Cl
!il
~~
(')({)
~
m::P
~~~
!!
:s:::P
g:~
TABU 13
,._m
i
[
I
W Thread-SeUing Plugs
~
~
Major Oiam.
zcno
~~~
0'\
:cCl
m::P
~0
GO
tO
U>
(')
--iz
W Thread-Setting Rings
!
GO
:;:
2
({)0
SH!ING GAGES fOR STANDARD THREAD SERIES, ClASSiES 4g6g AND 6H
M PROHU- UMSTS Of sazE (CONT'D)
:r::Cl
:D.,
mo
HI
E;::XJ
J
Major Diam.
(f)
Minor
Diam.
Minor
Diam.
Diam.
Class
6
ill
Pilch
Oiam.
Pilch
Oiam.
7
B
9
10
11
12
13
22.003
21.998
22.478
22.463
23.952
23.967
21.878
21.883
22.051
22.056
20.752
20.737
22.316
22.311
21.252
21.237
6H
22.663
22.658
22.957
22.942
23.962
23.977
22.557
22.562
22.701
.12.706
21.835
21.820
22.925
22.920
22.210
22.195
6H
23.977
24.199
24.186
24.968
24.981
23.899
23.903
24.026
24.030
23.376
23.363
24.226
24.222
23.676
23.663
6H
Full
Nominal Size
and Pitch
Class
Truncated
Form
Pitch
Oiam.
Truncated
1
2
3
4
5
M24 X 3
4g6g
22.603
22.588
23.952
23.967
M24 X 2
4g6g
23.063
23.048
23.962
'
Pilch
M25 X 1.5
4g6g
24.294
24.281
24.968
24.981
23.994
23.990
M27 X 2
4g6g
26.063
26.048
26.962
26.977
25.663
25.658
.15.957
25.942
26.962
26.977
25.557
25.562
25.701
25.706
24.835
24.820
25.925
25.920
25.210
25.195
6H
M30 X 3.5
4g6g
28.374
28.356
29.947
29.965
27.674
27.669
28.242
28.224
29.947
29.965
27.542
27.547
27.727
27.732
26.211
26.193
28.007
28.002
26.771
26.753
6H
M30 X 2
4g6g
29.063
29.048
29.962
29.977
28.663
28.658
28.<}57
28.942
29.962
29.977
28.557
28.562
28.701
28.706
27.835
27.820
28.925
28.920
28.210
28.195
6H
29.294
29.281
29.968
29.981
28.994
28.990
29.199
29.186
29.968
29.981
28.899
28.903
29.026
29.030
28.376
28.363
29.226
29.222
28.676
28.663
6H
32.063
32.048
32.962
32.977
31.663
31.658
31.957
31.942
32.962
32.977
31.557
31.562
31.701
31.706
30.835
30.820
3-.925
31.920
31.210
31.195
6H
34.142
34.124
35.940
35.958
33.342
33.337
34.002
33.984
35.940
35.958
33.202
33.207
33.402
33.407
31.670
31.652
33.702
33.697
32.270
32.252
6H
..\0
:;c,:..:..
0
0
~~
om
~~
~~
~::f
~a
~z
~>
:.;.r~~
~>
~0
Gl:I:
s:z
-tm
0
):>
z
0
"'z
~
M30 X 1.5
4g6g
-<
g
I
~c:
M33 X 2
4g6g
M36 X 4
4g6g
z
Gl
l!il
z
g
~
~
-
-
-
See Notes at end of table.
--
--·-
---
-
'--
--
-
-
):>
:s:m
:0
n):>
l>z
z(f)
z;p'--i):>
-(f)
o::;:
Zm
~~
(f)-
-t~
):>Ol
z:S:
o.:..
l>w
:O(l)
0~
ZoO
o
aa
~~~
~~~
:::l cnm
Q§;?::
~
)>)>
22
fJ)
)>-
o. rn
lH
s:)>
mm
<ern-
~s:
~~
nm
~l;
IA!:H.iE 13
il.s:
g_m
SHIING GAGES IFOR STANDARD THREAD SS:IUES, CLASSES 4lg6g AND 6H
)>til
2~
M PROfllf- UM!TS OlF S!ZlE{CONT'D)
1i'5.
2:....
l>m
o..:.
2(1)
W Thread-Setting Rings
W Thread-Setting !'lugs
GO
-1$
GO
!.0
r.,.
l>m
3-!S
fJ)
Major Oiam.
Pitch
Minor
Pitch
Minor
Truncated
Pitch
Diam.
Diam.
Diam.
Diam.
Diam.
Class
5
6
7
3
9
10
l1
12
13
35.962
35.977
34.663
34.658
34.957
34.942
35.962
35.977
34.557
34.562
34.701
34.706
33.835
33.820
34.925
34.920
34.210
34.195
6H
38.063
38.048
38.962
38.977
37.663
37.658
37.957
37.942
38.962
37.977
37.557
37.562
37.701
37.706
36.835
36.820
37.925
37.920
37.210
37.195
6H
4g6g
39.294
39.281
39.968
39.981
38.994
38.989
39.199
39.186
39.968
39.981
38.899
38.904
39.026
39.031
38.376
38.363
39.226
39.221
38.676
38.663
6H
M42 X4.5
4g6g
39.914
39.894
41.937
41.957
39.014
39.008
39.764
39.744
41.937
41.957
38.864
38.870
39.077
39.083
37.129
37.109
39.392
39.386
37.799
37.779
6H
M42X2
4g6g
41.063
41.048
41.962
41.977
40.663
40.657
40.957
40.942
41.962
41.977
40.557
40.563
40.771
40.707
39.835
39.820
40.925
40.919
40.210
40.195
6H
4g6g
44.294
44.281
44.968
44.981
43.994
43.989
44.199
44.186
44.968
44.981
43.899
43.904
44.026
44.031
43.376
43.363
44.226
44.221
43.676
43.663
6H
4g6g
45~681
47.929
47.949
44.681
44.675
45.521
45.501
47.929
47.949
44.521
44.527
44.752
44.758
42.587
42.567
45.087
45.081
43.297
43.277
6H
45.661
47.063
47.048
47.962
47.977
46.663
46.657
46.951
46.936
47.962
47.977
46.551
46.557
46.701
46.707
45.835
45.820
46.937
46.931
46.210
46.195
6H
49.294
49.281
49.968
49.981
48.994
48.989
49.194
49.181
49.968
49.981
48.894
48.899
49.026
49.031
48.376
48.363
49.238
49.233
48.676
48.663
6H
Class
1
Truncated
Diam.
2
3
4
M36 X 2
4g6g
35.063
35.048
M39 X 2
4g6g
M40 X 1.5
~~
~~
.,_
~i
-.1
0
g:::l
~~
NO
"'z
1i!!
~~
NC')
M45
Gl:I:
s::z
-lm
2
full
form
Nominal Size
and Pitch
full
Form
~~Q
~
Major Diam.
x 1.5
C'l
Pitch
~
::t1
0
0
s:
~
g"'
M48 X 5
~
M48 X 2
4g6g
I
~c
M50 X 1.5
Gl
-------
z
(§)
~
4g6g
'----
-
See Notes at end of table.
-----
s:
mCl
:ill>
c=;~
s:m
<:Jl)>
nZ
::oO
mCl
=E:t>
-;Cl
:r-
~
::oz
mCl
)>,
00
<:Jl::O
..··--.. ·.· ..
Z"OC"l
o
ao
~ ~~
%~;
!l~cn
o:r:::::
~"'m
S:C"l
ml>
-iC"l
~~a
~~i
::!!m
Q~
s:>z
~~[
c;Cil
~;
TABU 13
[~
""'
r
I
W Thread-Setting !'lugs
~
"'
QC"l
ml>
~~
_,z
W Th;ead-Setting Rings
:::cC1
::0-n
GO
:;:
CflCI
SETTING GAG~S fOR STANDARD THREAD SERIES, CLASSES 4g6g AND 6H
M PROIHlE- UMITS OF SIZE (CONT'D)
GO
LO
~0
HI
Cl::o
(/)
Major Dlam.
Major Diam.
Truncated
Form
Pitch
Oiam.
Truncated
Full
Form
Pitch
Oiam.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Class
!Jiam.
Class
2
3
4
5
6
7
8
9
10
11
12
13
M55 X 1.5
4g6g
54.294
54.281
54.968
54.981
53.994
53.989
54.194
54.181
54.966
54.981
53.894
53.899
54.026
54.031
53.376
53.363
54.238
54.233
53.676
53.663
6H
M56 X 5.5
4g6g
53.452
53.432
55.925
55.945
52.353
53.347
53.283
53.263
55.925
55.945
52.183
52.189
52.428
52.434
50.046
50.026
52.788
52.777
50.796
50.776
6H
M56 X 2
4g6g
55.063
55.048
55.962
55.977
54.663
54.657
54.951
54.936
55.962
55.977
54.551
54.557
54.701
54.707
53.835
53.820
54.937
54.931
54.210
54.195
6H
M60 X 1.5
4g6g
59.294
59.281
59.968
59.981
58.994
58.989
59.194
59.181
59.968
59.981
58.894
58.899
59.026
59.031
58.376
58.363
59.238
59.233
58.676
58.663
6H
M64 X6
4g6g
61.223
61.200
63.920
63.943
60.023
60.017
61.043
61.020
63.920
63.943
59.843
59.849
60.103
60.109
57.505
57.482
60.478
60.472
58.305
58.282
6H
M64 X2
4g6g
63.063
63.048
63.962
63.977
62.663
62.657
62.951
62.936
63.962
63.977
62.551
62.557
62.701
62.707
61.835
61.820
62.937
62.931
62.210
62.195
6H
Full
Nominal Size
and Pilch
1
I
zen
--.1
S,Q.
Q'~
:;o,:..:.
mO
~~
_fi-~
""'
t;..:!:!:
:::s;
0
",
~g
..,z
~>
:.:;.r-
~~
"''"'
G) :I:
~~
()
I
)>
z
)>
M65 X 1.5
4g6g
64.294.
64.281
64.968
64.981
63.994
63.969
64.194
64.181
64.968
64.981
63.894
63.899
64.026
64.031
63.376
63.363
64.238
64.233
63.676
63.663
6H
~
M70 X 1.5
4g6g
69.294
69.261
69.968
69.981
68.994
68.989
69.194
69.181
69.968
69.981
68.894
68.899
69.026
69.031
68.376
68.363
69.238
69.233
68.676
68.663
6H
c=;:t>
:t>z
zC/l
~c:
M72 X6
4g6g
69.223
69.200
71.920
71.943
68.023
68.017
69.043
69.020
71.920
71.943
67.843
67.849
68.103
68.109
65.505
65.482
68.478
68.472
66.305
66.282
6H
::!?;;
g
~
::0
~
zG)
tel
~
0
,.~
s:m
See Notes at end of table.
z-
:t>'-
Os;
Zm
~~
Cll·
~a;
zS:
o.:..
:t>co
:oro
O.::>o
Z"llCJ
3 i~
'30! g.~.
0
c.~
~~~
o:r~
::Jcnm
)>)>
22
rn
)>::::_:
;[~
HI
S:p.
t5 ~ ~
~~
3-
mrn
nm
~s;
=>
g:~
rr
)>o::;
2~
TABI..i: 13
a3
I
W Thread-Setting i'lugs
:;:
"'
2:.....
-IS:
0~
2to
l>co
r..,_
SETTiNG GAGES lFOR STANDARD THRIEAD SERiES, ClASSES 4g6g AND 6H
M PROFilE- liMITS O!F SIZE (CONT'D}
GO
)>m
W Thread-Setting Rings
(I)
GO
LO
~
HI
2
MajoY Diam.
0
Major Diam.
)>
:lJ
Nominal Size
and Pitch
Class
1
M72X 2
0
Truncated
Full
Form
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Oiam.
Class
5
6
7
8
9
10
11
12
13
71.962
71.977
70.663
70.657
70.951
70.936
71.962
71.977
70.551
70.557
70.701
70.707
69.835
69.820
70.937
70.931
70.210
70.195
6H
Truncated
Full
Form
Pitch
Diam.
2
3
4
4g6g
71.063
71.048
I
M75 X 1.5
4g6g
74.294
74.281
74.968
74.981
73.994
73.989
74.194
74.181
74.968
74.981
73.894
73.899
74.026
74.031
73.376
73.363
74.238
74.233
73.676
73.663
GH
MBO X 6
4g6g
77.223
77,200
79.920
79.943
76.023
76.017
77.043
77.020
79.920
79.943
75.843
75.849
76.103
76.109
73.505
73.482
76.478
76.472
74.305
74.282
6H
"'"'
~~
M80 Xl
4g6g
79.063
79.048
79.962
79.977
78.663
78.657
78.951
78.936
79.962
79.977
78.551
78.557
78.701
78.707
77.835
77.820
78.937
78.931
78.210
78.195
6H
!l?S:
M80 X 1.5
4g6g
79.294
79.281
79.968
79.981
78.994
78.989
79.194
79.181
79.968
79.981
78.894
78.899
79.026
79.031
78.376
78.363
79.238
79.233
78.676
78.663
6H
M85 X 2
4g6g
84.063
84.048
84.962
84.977
83.663
83.657
83.951
83.936
84.962
84.977
83.551
83.557
83.701
83.707
82.835
82.820
83.937
83.931
83.210
83.195
6H
M90 X6
4g6g
87.223
87.200
89.920
89.943
86.023
86.017
87.043
87.020
89.920
89.943
85.843
85.849
86.103
86.109
83.505
83.482
66.478
86.472
84.305
84.282
6H
M90 X 2
4g6g
89.063
89.048
89.962
89.977
88.663
88.657
88.951
88.936
89.962
89.977
88.551
88.557
88.701
68.707
87.835
87.820
88.937
88.931
88.210
88.195
6H
~~
g~
;u,:....:.
oO
.~
--4
N
};
0~
.,.z
~~
.,o
.,z
_,..
:....•
~>
"'"
Gl:I:
~tfi
§
~
i
~
I
~c
iii
@
~0
~
~
- - -
See Notl•o; ~~ end of table.
-
--
-
--
- - L__
--·--
~---
------
L__ _ _ _
s::mG'l
~)>
(')~
s::rn
(I))>
nZ
:cO
mG'l
~)>
-tG'l
:r-
::c.z
mG'l
)>-n
00
(1)::0
z"lln
m
S';Gl
m~
-iGl
~it;~
~~
~~§
:!:1m
~~
=>
s:~
z
CJ)0
()C/l
~~9!..
g:~
()
:§.m
TABU: 13
[
i
W Thread-Setting Plugs
~
"'
'i:
GO
ZlD
~~
~0
0::0
HI
(/)
Major Diam.
Full
Full
Truncated
Form
Pitch
Diam.
Truncated
Form
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
!'itch
Diam.
Minor
Diam.
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
M95 X 2
4g6g
94.063
94.048
94.962
94.977
93.663
93.657
93.945
93.930
94.962
94.977
93.545
93.551
93.701
93.707
92.835
92.820
93.951
93.945
93.210
93.195
6H
M100 X 6
4g6g
97.223
97.200
99.920
99.943
96.023
96.017
97.033
97.010
99.920
99.943
95.833
95.839
96.103
96.109
93.505
93.482
96.503
96.497
94.305
94.282
6H
M100 X 2
4g6g
99.063
99.048
99.962
99.977
98.663
98.657
:38.945
98.930
99.962
99.977
98.545
98.551
98.701
98.707
97.635
97.820
98.951
98.945
98.210
98.195
6H
M105 X 2
4g6g
104.063
104.040
104.962
104.985
103.663
103.655
103.945
103.922
104.962
104.985
103.545
103.553
103.701
103.709
102.835
102.812
103.951
103.943
103.210
103.187
6H
M110 X 2
4g6g
109.063
109.040
109.962
109.985
108.663
108.655
108.945
108.922
109.962
109.985
108.545
108.553
108.701
108.709
107.835
107.812
108.951
108.943
108.210
108.187
6H
M120 X 2
4g6g
119.063
119.040
119.962
119.985
118.663
118.655
118.945
118.922
119.962
119.985
118.545
118.553
118.701
118.709
117.835
117.812
118.951
118.943
118.210
118.187
6H
129.063
129.040
129.962
129.985
128.663
128.655
128.945
128.922
129.962
129.985
128.545
128.553
128.701
128.709
127.835
127.812
128.951
128.943
128.210
128.187
6H
139.063
139.040
139.962
139.985
138.663·
138.655
138.945
138.922
139.962
139.985
138.545
138.553
138.701
138.709
137.835
137.812
138.951
138.943
138.210
138.187
6H
....,
-.1
~j;
~=!
NO
Nz
->
~r-
GO
:::0-n
Class
!;: ~
.. -
-iz
:rGl
Nominal Size
and Pitch
;tl,:.:,
5-~
~~
m~
~Q
W Thread-Setting Rings
LO
Major Diam.
Q 0
::oGl
SETTING GAGES FOR STANDARD THREAD SERIES, CLASSES 4g6g AND 6H
M PROFILE- UMHS OF Slllt (CONT'D)
~~
Nn
Gl:C
s:z
-<m
"s:
0
~
Iill
)
~c
z
Gl
@
~0
z
>
~
M130 X 2
M140 X 2
4g6g
4g6g
~
s:m
::0
()~
~z
--
See Notes at end of table.
~
--
ZC/l
z-
~'
-l~
-Cil
as:
Zm
~~
Cll·
-i~
~C)
zS:
o.:..
~CD
::00)
0~
Z"CC1
~~.g
~00..;:::"
g:~
~~~
o::r::s::
cnm
:;:::1
l>l>
iH
22
l>~
~gg
s:);;
~~
:!:!~
~13~
m(f)
Om
~)>
R~
r
~
TABU: 13
~
a3
SETTING CAGES FOR STANDARD THREAD SERIES, CLASSES 4g6g AND 6H
M IPROfiii..E- LIMiTS OF SIZE(CONT'D)
:;:
W Thread-Setting Plugs
<f)
~
-.J
.;....
GO
LO
2m
l>co
r.,_
~
z
HI
g
::0
Major Diam.
Major Diarn.
zcno
0.:_.
W Thread-Seffing RingS
GO
~~-
l>;:o
z~
z:..
)>Ql
::!S:
0
Nominal Size
and Pitch
Class
Truncated
Form
Pitch
Diam.
Truncated
Full
Form
Diilm.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
M150 X 2
4g6g
149.063
149.040
149.962
149.985
148.663
148.655
148.945
148.922
149.962
149.985
148.545
148.553
148.701
148.709
147.835
147.812
148.951
148.943
148.210
148.187
6H
M160 X 3
4g6g
158.603
158.580
159.952
159.975
158.003
157.995
158.463
158.440
159.952
159.975
157.863
157.871
158.051
158.059
156.752
156.729
158.351
158.343
157.252
157.229
6H
M170 X 3
4g6g
168.603
168.580
169.952
169.975
168.003
167.995
168.463
168.440
169.952
169.975
167.863
167.871
168.051
168.059
166.752
166.729
168.351
168.343
167.252
167.229
6H
M180 X 3
4g6g
178.603 .
178.580
179.952
179.975
178.003
177.995
178.463
178.440
179.952
179.975
177.863
177.871
178.051
178.059
176.752
176.729
178.351
178.343
177.252
177.229
6H
M190X 3
4g6g
188.603
188.580
189.952
189.975
188.003
187.995
188.443
186.420
189.952
189.975
187.843
187.851
188.051
188.059
186.752
186.729
188.386
188.378
187.252
187.229.
6H
M200 X 3
4g6g
196.603
198.580
199.952
199.975
196.003
197.995
198.443
198.420
199.952
199.975
197.843
197.851
198.051
198.059
196.752
196.729
198.386
198.378
197.252
197.229
6H
full
Pitch
0
::::0'(3
g~
"'-~
~ffi
~-=
\"z
~~
NO
~~
:...;.r-
~~
"'"
s:z
-<m
Q:I:
"
0
s:
$
z
-<
1
~
~
z
"'
@
~
~
~
---
L_
--
-
---
-
-
GEN£RAL NOTE: All GO setting plug gages are the same as 6g sizes.
NOTE:
(1) M14 X 1.25-special thread for spark plugs only. See applicable document for thread tolerance class and limiting dimensions.
s:
mo
:til>
-o
om
s:(/)
(/))>
oZ
::oO
mCJ
=E:t>
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-iCJ
mCJ
l>"'l'l
00
(/)::0
GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
5.1. 1 'I Chip Grooves. GO thread ring gages of
the adjustable type do not require chip grooves as the
adjusting slots serve this purpose. Solid working
thread ring gages are made with or without chip
grooves. depending upon the gage designer's requirements.
5.2.4. Thread Form. The specifications for
rhread form are summarized in Table 4 and Fig. 19.
5.2.5 Thread Crests. The minimum minor diameter oft he LO thread ring gage shall be equa I to the
minimum pitch diameter of the external thread minus
0.2p with gage tolerance plus. Thi~ corresponds to a
width ofnat at the crest oft he gage equal to 0.385p. See
Tahle 4.
5.1.12 Identification. The GO thread ring gage
should be marked by the metric nominal si?e. pitchtolerance class. GO. PD. and pitch diameter in millimeters.
5.2.6 Thread Roots. The ma_jor diameter of the
LO thread ring gage shall clear !he product thread hy
using a clearance cut of O.J85p width appro.ximately
central. except for threads smaller than 5 mm and
pitches smaller than 0.8 mm. The LO thread ring gage
shall clear t_he maximum major diameter of the fullform portion of the truncated thread-setting plug for
the 1.0 tfiread ring gage. Thus. contact of the thread
gage can occur on the sides of the threads. but not on
the crest or root. Also. the effect of angle \·a riation on
the fit of the gage with the product thread i~ minimized.
EXAMI't.E:
MH X l-6g GO I'D7J24
5.2 LO Thre::~d Ring Gages (Table 1 -Gage 1.2)
5.2.1 Purpose and Use. The 1.0 thread ring
gage inspects the 1.0 functional diameter limit. 8 1 • of
product thread. The l.O thread ring gage. when
properly set Jo its resrective calibrated thread-setting
plug. represents the LO functional diameter limit oft he
rrod uct ex lerna I thread. The 1.0 thread ring gage and
'-P threaded .~egment type indicating gage are more
reliable for checking thin-walled parts which might be
deformed by a LO thread snar. LO thread ring gages
must be set to applicable W tolerance-setiing plugs.
LO thread ring gages when applied to the product
external thread may engage only the end threads
(which may not be representative of the complete
product thread).
Starting. threads on l.O thread ring gages are subject
10 gre<ner wear !han the remaining threads. Such wear
in combination with the incomplete threads at the end
of the product thread permit further entry in the gage.
LO funcrional diameter limil is acceptable when the
LO thread ring gage is applied to the product external
thread if:
(ai ir is not entered; or
(b) all complete product threads enter, provided
that a definite drag from contact with the product
material results on or before the second turn of enrry.
The gage should not be forced after the drag is definite.
5.2. 7 Runout of Pitch and Minor Diameter
Cylinders. The permissible minimum effective minor
diameter. as determined by subtmcting runout measurement (full-indicator movement) with respect to the
pitch cylinder from the measured minor diameter. shall
not be less than the specified minimum minor diameter
minus twice the sum of the gage tolentnces for pitch
and minor diameters.
· 5.2.8 Pitch Cylinder. Pitch cylinder is transferred by the setting of the thread ring gage to the
applicable truncated setting plug gage.
5.2.9 Lead and Half-Angle Variations. Lead
<lnd half-angle yariations shall he within the limits
specified in Table 6.
5.2.1 0 Incomplete Thread. The feather edge at
both ends of the thread ring gage shall be removed. On
gages larger than M 12 or having pitches coarser than
1.25 rnm. notmore than one complete turn of the end
threads shall he removed to obtain a full-thread blunt
start. On gages M 12 and smaller or having pitches of
1.25 m m or finer. a 60 de g. chamfer from the axis oft he
gage is acceptable in lieu of the blunt start.
Special requirements such as exceptionally thin or ductile material, sma II number of threads, etc .. may necessitate modification of this practice.
5.2.2 Basic Design. To better check the LO
functional diameter limit. the nank contact is less than
that of the GO gage. and the length of the gaging element where practical is less than that of the GO gage.
5.2.11 Identification. The LO thread gage
should be marked by the metric nominal size. pitchtolerance class, LO. PD. and pitch diameter in millimeters.
5.2.3 Gage Blanf(s. For practical and economic
reasons. the designs and thicknesses of thread ring
gages have been standardized for various ranges and
pitches (see ANSIIASME B47.1aM or Table C2).
...
.. ·· .. ·.· ..... ·. ·.-·-··.·· ··-·
Copyright ASME lntornotlonal
Provided by IHS undor license wilh ASME
No rep10duclion or networking ponnilled wllhout license from IHS
EXAMPLE:
Mil X l-6g LO PD7.212
75
Order NumbDr: o·I9BG654
Sold to:[01986654] NATIONAL MACHINE COMPANY (096226100001)- BYOUNG@NATIDNALMA
Not for Rosala,2013-1'1-22 21 :19:12 GMT
ANSI/ASME B1.16M·1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
"0
"'~
0
£
"
1J
0
'iii
Q.
0
E
e
"0
e"'
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OJ
E ·.c
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FIG. 19
5.3
LO FUNCTIONAL DIAMETER LIMIT
Thread Snap Gages-GO Segments
or Rolls (Table 1-Gages 2.1 and 2.3)
product circumference. Product shall be checked
around full circumference of thread at sufficient axial
positions to check the full-thread length.
Thread rolls shall be applied at several locations
(three if possible) axially 0ver the full-thread length of
the product. The circumference shall be checked at
each position.
· 5.3.1 Purpose and Use. The thread snap gage
with two GO threaded Sl;'gments or two GO 1.ero kaJ
rolls inspects the maximum-material GO functional
limit, A 1. of product external thread. The setting of the
GO segment~ or rolls represents the maximum material GO functional limit of the product external
thread. and its purpose is to assure interchangable
assembly of maximum-material mating parts. The
gaging length of the segments or rolls i~ equal to the
length of the standard GO ring gages. Thesegments or
rolls have a cumulative check of all thread elements
except the major diameter.
The GO thread snap gage c<~n also check roundness
of the pitch cylinder for 180 Jeg. ovality by using the
gage at different external diametral locations on the
product threa<..l.
5.3.3 Thread Form. The specifications for thread
form are summari;:cd in Table 4 and Fig. 20.
5.3.4 Thread Crests. The distance between the
minor diameter of the GO thread segments and the
outside diameter of GO thread rolls shall be equal to
the maximum pitch diameter of the product external
thread minus /-fi2 with a minus gage tolcmn::e when
assembled in gage frame. This corresponds to a width
of Oat of P,i4 on crests. The thread crests shall be tlat in
an axial plane and parallel to the axis.
5.3.5 Thread Roots. The major diameter of the
GO thread segments and root diameter oft he GO rolls
shall be cleared beyond a Pl8 Oat either by an extension of the Oanks of the thread toward a sharp vee
or by an undercut no greater than P' 8 maximum width
and approximately central. The root clearance must be
such that the maximum major diameter of the fullform section of the truncated thread-setting plug gage
is cleared after the gage has been properly set to size.
5.3.2 Basic Design. The GO segments and rolls
assembled into p:<~ge frames nre the design of the individual gage manufacturer. The lengths of the two
threaded segments and the two thread rolls spaced l ~0
dcg. apart are equal to the standard GO ring gage
blank lengths for practical and ce0nornic reasons. See
ANSI·' AS ME !147.1 aM or Table C2.
GO thread segments shall engage 250( or more of the
..
·-···· ·.· ..... ·.··· .. ·.··.··· ... ·...
Copyright ASME International
Provided by JHS under license wilh ASME
hlo roproduclion or networking pcrmltlod without license from IHS
76
Ordor Number: 01986654
Sold lo:[01986654] NATIONAL MACHINE COMPANY [096226100001) • BYOUNG@NATIONALMA
Nollor Rosalo,2013-11-22 21:19:12 GMT
ANSI/ASME B1.16M·1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
!::
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(!)
...J
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:.!:
I
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w
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lOOPOJd jO 'WB!P 40l!d ·xew
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c
tonpoJd 10 ·weJp Jofew ·xew
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w
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77
Copyrlghl/\SME lnletnntlonal
Provided by 11-\S under license with ASME
No raprocluctlon or notworklng permitted wilhoutlicrmso rrom IHS
Order Number. 01966654
Sold to:[01966654] NATIONAL MACHINE COMPANY (096226100001)- BYOUNG@NATIONALMA
Not for Rcsalc,2013-11-22 21 :19:12 GMT
GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASMF. B1.16M-19B4
AN AMERICAN NATIONAL STANDARD
outside diameters of LO thread rolls shall be equal to
the minimum pitch diameter of the product external
thread minus 0.2p with the gage tolerance plus when
assembled in gage frame. This corresponds to a width
of flat at the crest equal to 0.385p. See Table 4.
5.3.6 Runout. The pitch and minor cylinders of
the threaded portion of the GO segments or rolls shall
not exceed the specified runout as determined by
measurements of runout (full-indicator movement).
On each gaging member, with respect to the pitch
cylinder, runout shall not exceed one-half the X gage
minor diameter tolerance.
5.4.5 Thread Roots. The major diameter of the
LO thread segments or root diameter of the LO rolls
shall clear the product thread by using a clearance cut
of 0.385p width approximately central except for
threads smaller than 5 mm and pitches smaller than 0.8
mm. Snap gage contacts shall clear the maximum
major diameter of the full-form portion of the setting
plug for the LO thread snap gage. Thus, contact of the
thread gage can occur on the sides of the thread but not
on the crest or root. Also, the effect of angle variation
on the fit of the gage with the product thread is
minimized.
5. 3. 7 Pitch Cylinder. The pitch cylinder of the
threaded GO segments and rolls shall be straight 'within
the X gage pitch diameter limits specified.
5.3.8 Lead, Pitch, and Half-Angle Variations.
Lead, pitch, and half-angle variations shall be within
the limits specified. See Table 6.
5.3.9 Identification. The assembled gage should
be marked by the metric nominal size, pitch-tolerance
class, GO, PO, and pitch diameter in millimeters.
5.4.6 Runout. The pitch and minor cylinders of
the threaded LO segments or the pitch and outside
cylinders of the rolls shall not exceed the specified
run out as determined by measurement of runout (fullindicator movement). On each gaging member, with
respect to the pitch cylinder, runout shall not exceed
one-half the X gage minor diameter tolerance.
EXAMPLE:
M8 X l-6g GO PD7.324
5.4 Thread Snap Gages-LO Segments
or Rolls (Table 1-Gages 2.2 and 2.4)
5.4.1 Purpose and Use. The thread snap gage
with two LO segments or two LO rolls inspects the LO
functional diameter limit, B1, of product external
thread. The setting of the LO segments or rolls
represents the LO functional diameter limit of the
product external thread. In applying the thread snap
limit gage, the LO functional diameter limit is acceptable when gaging elements do not pass over the
product thread.
The LO thread snap gage can also check roundness
of the pitch cylinder for 180deg. ovality by passing the
gage over the thread at different diametrallocations on
the external thread.
The LO thread snap gage can also check taper of
pitch cylinder by passing the gage over the thread at
different locations axially on external thread.
5.4. 7 Pitch Cylinder. The pitch cylinder of the
threaded LO segments or rolls shall be straight within
the X gage pitch diameter limits specified.
5.4.8 lead, Pitch, and Half-Angle Variations.
Lead, pitch, and half-angle variations shall be within
the limits specified. See Table 6.
5.4.9 Identification. The assembled gage should
be marked by the metric nominal size, pitch-tolerance
class, LO, PO, and pitch diameter in millimeters.
EXAMPLE:
M8 X 1-6g LO PD7.212
5.5 Thread Snap Gages - Cone and Vee
(Table 1 - Gage 2.5)
5.4. 2 Basic Design. In order that the LO thread
5.5.1 Purpose alld Use. The thread snap gage
with cone and vee rolls or segments inspects minimummaterial diameter limit, C1. The setting of the cone and
vee rolls or segments represents the minimum-material
limit pitch diameter of the product external thread.
The cone and vee snap gage can check roundness of
pitch diameter for 180 deg. ovality bypassing the gage
over the thread at different diametral locations on the
external thread.
The cone and vee snap gage can check taper of pitch
cylinder by passing the gage over the thread at different
locations axially on external thread.
snap gage may effectivelycheck the LO functional
diameter limit, the nank contact is reduced by truncating the thread on segments and rolls. As the design
of the segments or rolls is different with each gage
manufacturer, the number of threads engaged in
product thread will vary. Usually, the number of
pitches engaged is approximately two.
5.4.3 Thread Form. The specifications for thread
form are summarized in Table 4 and Fig. 21.
5.4.4 Thread Crests. The minor diameter oft he
LO thread segments and the inner distance between the
78
Copyright ASME International
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·
GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSIIASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
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Order Number: 01986654
Provided hy 11-JS undm license wilh ASME
Sold lo:[019BGB54j NATIONAL MACHINE COMPANY [096228100001)- BVOUNG@NATIONALMA
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
diameter of the product external thread. The GO gage
must completely receive or pass over the major diameter of the product external thred to assure that the
major diameter does not exceed the maximum-material limit. The NOT GO cylindrical ring gage or NOT
GO plain snap gage must not pass over the major
diameter of the product external thread to assure that
the major diameter is not less than the minimummaterial limit.
5.5.2 Basic Design. The segments are usually
made having a surface contact at or slightly above the
pitch line near the center of the flank. The rolls make
point or line contacts approximately at the pitch line.
depending upon the angle variations of the thread
flanks. See Fig. 22 for details.
5.5. 3 Thread Form. The specifications for thread
form, thread crests, and thread roots are shown in
Fig. 22.
5. 7.2 Design of Gage Blanks and Gages. Plain
cylindrical ring blanks and plain progressive adjustable
snap gages have been standardized for various size
ranges (see ANSI/ ASME B47.1aM and Fig. 24).
5.5.4 Identification. The assembled gage should
be marked by the metric nominal size, pitch-tolerance
class. PD. and pitch diameter in millimeters.
EXAMPLE:
5. 7.3 Identification. Cylindrical rings or plain
snap gages should be marked with metric nominal size.
pitch-tolerance class, GO and/ or NOT GO, and major
diameters in millimeters.
Mfi X l-6g PD7.212
5.6 Thread Snap Gages- Minimum
Material: Thread Groove Diameter
Type (Table 'I -Gage 2.6)
EXAMPLE:
M8 X l-6g GO 7.974 and{ or NOT GO 7.794
5.6. ·t Purpose and Use. The thread snap gage
5. 7.4 Precision Instruments (Table 1 - Gage
14). Precision instruments such as dial calipers, outside micrometers, vernier calipers, and pocket slide
calipers can also be used to measure the major
diameter of product external thread.
with radius type ribbed rolls inspects minimum-material diameter limit, Dt. The setting oft he thread groove
diameter type snap gage by LO setting plug gage
represents the minimum~materiallimit pitch diameter
of the product external thread.
The thread groove diameter type snap gage can
check roundness for 180 deg. ovality by passing the
gage over the thread at different diametrallocations on
the external thread.
The thread groove diameter type snap gage can
check taper of pitch cylinder by passing the gage over
the thread at different locations axially on external
thread.
5.8 Snap Gages for Minor Diameter of
Product- External Threads
(Table 1 - Gages 3.3 and 3.5)
5.8.1 Purpose and Use. The GO thread ring
gages inspect the depth of thread equivalent to the
minor diameter of the product internal thread. If the
minor diameter of the external thread requires checking, a minimum-maximum thread snap gage may be
used. GO segment or roll snap gage must pass over
product thread. NOT GO segment or roll must. not
pass over product thread.
!5.6.2 Basic Design. The thread groove diameter
type has "best size" thread wire size radius ribbed rolls
which contact at the pitch line.
5. 6.3 Thread Form. The specifications for radius
type rolls are shown in Fig. 23.
5.6.4 identification. The assembled gage should
be marked by the metric nominal size, pitch-tolerance
class. PD. and pitch diameter in millimeters.
5.8.2 Basic Design. A thread snap gage has segments or rolls with a thread form of 55 deg. maximum.
There usually are three threads on the segments or
three ribs on the rolls on GO and NOT GO gaging
elements. See Fig. 25.
EXAMPLE:
M8 X l-6g PD7.212
5.8.3 Identification. Thread snap gages should::·
be marked with metric nominal size, pitch-tolerance!:
class. GO. NOT GO, minor diameter limits in milli-.!
meters, and MINOR DIAMETER EXTERNAL.
.
5. 7 Plain Ring and Snap Gages to Check
Major Diameter of Product External
Threads (Table 1 -Gages 3.1, 3.2,
and 3.4)
EXAMPLE:
5. 7.1 Purpose and Use. The GO and NOT GO
cylindrical ring and plain snap gages inspect the major
M8 X f-6g GO - NOT GO (Customer's Specifications)
MINOR DIAMETER EXTERNAL
80
Copyright ASME International
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above
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GENERAL NOTE:
Contacts in other positions near
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Gaging Element
Contacts
central on
pitch line
{b)
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MINIMUM-MATERIAL PITCH DIAMETER LIMIT -
CONE AND VEE
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
Rolls-gaging contacts With
radius one·hoif "best size"
thread wire diameter
~
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roll
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FIG. 23
THREAD SNAP GAGES- MINIMUM-MATERIAL
THREAD GROOVE DIAMETER LIMIT
@@
GO
NOT GO
(a) Cylindrical Ring Gages
(Made to Class Z tolerance, Table 8)
(b) Adjustablo limit Snap Gage
(sO<! ANSI/ASME flt!7.1oM for dotailo)
FIG. 24
MAJOR DIAMETER LIMIT
82
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
83
Copyright ASME International
Provided by IHS under liccnfie with ASME
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME Bl.lGM-1904
AN AMERICAN NATIONAL STANDARD
5.9.7 Pitch Cylinder. The pitch cylinder of the
thread segments and rolls should be straight within the
X gage pitch diameter limits specified.
5.9 Functional Indicating Thread Gages
for El{ternal Thread (Table 1 Gages 4.1 and 4.3)
5.9.1 Purpose and Use. The indicating thread
gage with segments or rolls inspects the maximummaterial GO functional limit and size, A 1 and A2,
and the LO .functional diameter limit and size,
B1 and B~. of product external thread. The gage is also
used to check even or odd lobe roundness of pitch
cylinder.
Indicating thread gages must be set to the proper
thread-setting plug gages. Readings indicate the position of product external thread within the tolerance
range.
5.9.8 lead, Pitch, and Half-Angle Variations.
Lead, pitch. and half-angle variations shall be within
the limits specified. See Table 6.
5.9.9 Identification. The segments and rolls shall
be identified by the metric nominal size and pitch.
When indicating gage is assembled with proper contacts, the gage should be marked with the metric
nominal size, pitch-tolerance class, PD. and pitch
diameter limits in millimeters.
EXAMPLE:
M8 X l-6g PD7.324-7.212
~3.9.2
Basic Design. Indicating gages have two
or three contacts at 180 deg. or 120 deg .. respectively.
Gages with segments or rolls are designed with the
length of the GO functional maximum-material gaging
elements equal to the length of the standard GO ring
gages.
5,10 Minimum-Material Indicating Thread
Gages for External Thread (Table 1 Gages 4.5 and 4.6)
5.9.3 Thread Form. The specifications for thread
for,m for GO functional maximum-material segments
and rolls arc summarized in Table 4 and Fig. 26.
5.1 0.1 Purpose and Use. The indicating thread
gage with cone and vee rolls or segments and the thread
groove diameter type with rolls inspect the minimummaterial limit and size. C1 and c~. D, and D~. of
product external thread. Either type of three-roll and
three-segment gage can check roundness of pitch
cylinder for 120 de g. lobing and taper of pitch cylinder.
The two rolls and two segments check even lobing
roundness and taper. The indicating gages are set to
proper thread-setting plug gage. Readings indicate the
position of product external thread pitch diameter
within the tolerance range.
5.9.4 ThreadCrests. Theminordiameterofthe
GO functional maximum-material thread segments
and the diameter of the circle surrounded by the roll
cl~ster of GO functional maximum-material rolls shall
be equal to the maximum pitch diameter of the product
external threads minus H 2 with a minus X gage
tolerance when assembled in gage frame. This corresponds to a width of flat of P 4 on crests. The thread
crests shall be flat in an axial plane and parallel to the
axis of segment or roll.
5.9.5 Thread Roots. The major diameter of the
GO functional maximum-material thread segments
and the root of the GO functional maximum-material
rolls shall be cleared beyond a P 8 flat either by an
extension of the flanks of the thread toward a sharp vee
or by an undercut no greater than P! 8 maximum width
and approximately central. The root clearance must be
such that the major diameter of the full-form section of
the thread-setting plug gage is cleared after the assembled gage has been properly set to size.
5.10.2 Basic Design. The cone and vee indicating thread gage has rolls or segments with contact near
the pitch line or contact slightly above the pitch line
near the center of the flank. The thread groove diameter type indicating thread gage also has two or
three rolls with the radii on the ribs of rolls made to
"best size" thread wire size.
5.1 0.3 Thread Form. The specifications on form
of cone and vee rolls and segments and thread groove
diameter type rolls are shown in Figs. 27 and 28.
5.9.6 Runout. The pitch and minor cylinders of
the threaded segments and the pitch and outside
cylinders of the rolls ghall not exceed the specified
runout as determined by measurements of runout (fullindicator movement). On each gaging member with
respect to the pitch cylinder. runoul shall not exceed
one-half the X gage minor diameter tolerance.
5.1 0.4 Identification. The assembled gage should
be marked with the metric nominal size, pitch-tolerance class. PD. and pitch diameter in millimeters.
EXAMPLE:
M8 X l-6g PD7.212
84
Copyright J\SME lntornallanal
Provided by IHS under license with ASME
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
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85
Copyright ASME International
Provlclod by IHS undor license with ASME
No reproduction or networking permllted without license from IHS
Order Number: 01986654
Sold lo:[01986654] NATIONAL MACHINE COMPANY (096226100001]· BYOUNG@NATIONALMA
Not for Rosalo,2013-11-22 21:19:12 GMT
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g
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Alternate Designs
Gaging Element
Contact
central on
pitch line
:!!:t>
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Contacts in other positions near
the pitch cylinder are also U$8d.
i
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z
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FIG. 27
INDICATING THREAD GAGES -
MINIMUM-MATERJAL ...PlTCH-.DlAMETER LIMIT AND SIZE -
CONE AND VEE
00
(/);:Q
GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
One rib on
top roll
Rolls- gaging contacts with
radius one-half "best size"
thread wire diameter
Two ribs
on bottom
roll
One rib on
each roll
one-third pitch
apart
Rolls
Two or Throe
Contacts
FIG. 28
INDICATING THREAD GAGES - MINIMUM-MATERIAL THREAD GROOVE
DIAMETER LIMIT AND SIZE
87
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Ordor Number: 01986654
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.'i6M-1984
AN AMERICAN NATIONAL STANDARD
method of in-process inspection, final conformance
inspection, or both, that provides the actual numerical
values for both GO functional and pitch diameter sizes.
These are the two extreme sizes of any product screw
thread. One of the sizes, pitch diameter, is the size of
the thread pitch diameter with essentially zero variation in all other thread elements, while the other size,
GO functional size, is the size of the thread with the
effects of all variations in all other thread elements
added to the pitch diameter. The numerical difference
between these two sizes is called a cumulative thread
element variation differential and represents the d iametral effect of the total amount of thread element
variation differential.
The inspection process that further refines the total
amount of thread element variation so that the amount
of variation for each individual element becomes
known is called a single thread element variation
different iaf.
5.11 Indicating Runout Gage for External
Threads (Table 1 - Gage 4. 7)
5.11. 'I Purpose and Use. This indicating gage
inspects the runout of the major diameter to the pitch
diameter, M 1, of the product external thread. Readings indicate the position of product major diameter to
the pitch diameter within the tolerance specified.
5.11.2 Basic Design. Indicating gages have three
contacts, one plain and two threaded, at 120 deg., or
two contacts, one plain and one threaded, at 180 de g.
The threaded segments or roll contacts are minimummaterial pitch diameter type. See Fig. 27. The lengths
of the plain and threaded contacts are designed equal
to the length of the standard GO ring gage. See
ANSI/ ASME B47.laM and Table C2. The indicating
gage is set to a basic full-form thread-setting plug gage
with plain gaging contact on outside diameter of
thread-setting plug gage and thread contact on pitch
diameter of thread-setting plug gage.
5.12.2 Cumulative Thread Element Variation
Differential. Indicating gages have either three con~
tacts at 120 deg. spacing or two contactsat 180 deg.
spacing. The' indicating gages with segments or rolls as
shown in Figs. 26 and 30. sketch (a), give the functional
size indicating reading, Z. The indicating gage with
cone and vee segments or rolls with one thread pitch
engagement at pitch diameter line, Fig. 27, and thread
groove diameter type. Fig. 28, or both, shown in Fig.
30, sketches (c) and (d), give the pitch diameter size
indicating reading, X. The difference in the indicator
readings, Z-X, between the two types of gages gives
the cumulative form differential reading which corresponds to the pitch diameter equivalent, tJ.d2 C, for
the combination of lead, helix, flank angle, roundness,
and taper variations on the product thread. See Fig. 30.
!5.11 :3 Thread Form, Thread Crests, and Lead
and Half-Angle Variations. The specifications for
thread form, thread crests, and lead and half-angle of
thread segments and thread rolls are noted in 5. 9. Plain
contacts have a line bearing on major diameter of
product. See Fig. 29.
l~.1 '1.4 Identification. The gaging elements, segments, or rollS' should be marked with metric nominal
size and pitch. When indicating gage is assembled with
proper gaging contacts, the indicating gage should be
marked with the metric nominal size, pitch-tolerance
class, and RUNOUT.
EXAMPLE:
M8 X l-6g RUNOUT
5.12.3 Single Thread Element Variation
Differential
5.12.3.1 Lead (Helix) Differential Reading.
The indicating gage reading, Y, using the full-form
thread segments or rolls with one thread pitch engagement, similar to Figs:26and 30, sketch (b), is compared
to the reading Z, using the functional size gage shown
in Figs. 26 and 30, sketch (a). The difference between
the measured values, Z - Y, is the lead differential
reading which corresponds to the pitch diameter ·
equivalent, tldz'A, for the lead and helix variation on
the product thread.
5. '12 Differential Gaging
(Table 1 - Gage 4.8)
5.12.1 The concept of differential gaging for
product external threads makes use of fundamental
geometric theorems that relate directly to size, position, and form.
For differential gaging, two methods are used for
measuring screw thread size:
(a) GO functional size
(b) pitch diameter (or thread groove diameter)
Only when a screw thread has perfect position and
form [i.e., zero variation in lead (including helical
path), flank angle, taper, and roundness] are these two
measurements equal. Differential gaging is a variables
5.12.3;2 Flank Angle Differential Reading.
The indicating gage reading, X, using segments or rolls
with cone and vee design, Figs. 27 and 30, sketch (c), is
compared to the reading, Y, using the full-form thread
. 88
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSIIASME B1.16M·1984
AN AMERICAN NATIONAL STANDARD
Segments
Two or Three
Contacts
Rolls
Two or Three
Contacts
F~G.
29
INDICATING THREAD GAGES ·.. ·.··.··· ...
Copyrigllt ASME lnternalional
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DIAMETER RUNOUT -
MAJOR TO PITCH
89
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
Functional diameter
Segments
Two of three
Contacts
also used for
lead analysis
(at
Pitch diameter
Similar to Fig. 26
also used for lead and
angle analysis
Rolls
Two or Three
contacts
(bf
Pitch diameter
od2 c = Z-X =cumulative form
differential analy;is
(l.d2 "I<= z- y = individual element
analysis for lead variation
Indicator reading }
measured
(cf or (d)
pitch diameter
X
(cf used for
angle analysis only
od2 a = Y-X = individual element
analysis for angle variation
FIG. 30
INDICATING THREAD GAGES -
P. D. Cone Contact
P. D. Rad. Contact
lei
(d)
DIFFERENTIAL GAGING
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
segments or rolls, similar to Figs. 26 and 30, sketch (b).
Both designs have one thread pitch engagement. The
difference between the measured values, Y - X, is the
flank angle differential reading which corresponds
approximately to the pitch diameter equivalent, dd 2a:.,
for the combined flank angle variation on product
thread.
5.12.3.3 Roundness and Taper Differential
Readings. By the usc of full-form thread segments or
rolls with one thread pitch engagement, similar to Figs.
26 and 30, sketch (b). cone and vee segments or rolls.
Figs. 27 and 30. sketch (c), or thread groove diameter
type, Figs. 28 and 30, sketch (d), the roundness and
taper of pitch cylinder is checked. Rotate the product
between contacts at different axial locations on thread
for maximum differences in roundness and taper
readings. Two contacts spaced 180 de g. apart give even
lobing out-of-round measurement. Three contacts
spaced 120 deg. apart give odd lobing out-of-round
measurements.
5.12.4 Thread Form. The functional segments
or rolls, Fig. 30, sketch (a). are described in 5.9. The
full-form, one thread vee segment or roll, Figs. 26 and
30, sketch (b) lower contact, has a depth of thread
equivalent to the functional type. but relieved on the
outside thread flanks. The full-form cone segment or
roll, Figs. 26 and 30. sketch (b) upper contact, has a
PI 8 flat on outside diameter. The cone and vee segments or rolls. Fig. 30. sketch (c), are described and
shown in Fig. 27. Thread groove diameter type. Fig.
30. sketch (d). is described and shown in Fig. 28.
5.12.5 Identification. The gaging clements (segments or rolls) should be marked by metric nominal
size and pitch. Indicating gages, assembled with proper
contacts, should be marked with metric nominal size.
pitch-tolerance class. and the type of differential reading specified above.
EXAMPLE:
M8 X J-6g Flank Angle Differential Variation
5.13 W Tolerance Thread-Setting
Plug Gages
5.13.1 Purpose and Use. Thread-setting plug
gages are used to set adjustable thread ring gages,
check solid thread ring gages. set thread snap limit
gages, and set indicating thread gages. Thread-setting
plug gages are also applied to detect wear on gages and
gaging elements in use. GO thread-setting plug gages
are made to the maximum-material limit of the external thread specification, while LO thread-setting
Copyright ASME lnlcrnatlonnl
Providm.l by IHS under license with ASME
No reproduction or n~tworklng permitted withoulllccnso from IHS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
plug gages are made to the minimum-material limit of
the thread specification.
5.13.2 Basic Design. Thread-setting plug gages
are of two standard designs which are designated as
full-form and truncated setting plugs. The full-form
GO setting plug is one having a width of flat at the crest
equal to P/8. The truncated GO setting plug is the
same as the full-form setting plug except that it is
longer and the crest of the thread is truncated a
greater amount for one-half the length of the gage
giving a full-form portion and a truncated portion. See
Figs. 31 and 32 and Tables 5, 7, II, and I3.
5.13.3 Gage Blanks. For practical and economic
reasons, the lengths of setting plug gages have been
standardized for various size ranges and pitches (see
ANSI/ ASME B47.1aM or Table C2). The length of
the full form and the length of the truncated sections
are each at least equal in length to the thickness of the
corresponding thread ring gage.
5.13.4 Thread Form. The specifications for thread
form of setting plug gages are stated in detail below
and are summarized in Table 5 and Figs. 31 and 32.
5.13.5 Thread Crests
5.13.5.1 The major diameter of the GO fullform setting plug and of the full-form portion of the
truncated GO thread-setting plug is equal to the maximum major diameter of the product external thread.
5.13.5.2 The major diameter of the truncated
portion of the truncated GO thread-setting plug is
equal to the maximum pitch diameter of the product
external thread plus 0.2p.
5.13.5.3 The major diameter of the LO fullform setting plug and of the full-form portions of the
truncated LO thread-setting plug is equal to the
maximum major diameter of the product external
thread (same as GO thread-setting plug). The maximum major diameter of any gage must correspond to a
truncation that is not less than 0.022 mm (equivalent to
a crest width of 0.0254 mm flat). See Table 5.
5.13.5.4 The major diameter of the truncated
portion of the truncated LO thread-setting plug is
equal to the minimum pitch diameter of the product
external thread plus 0.2p.
5.13.6 Thread Roots. The minor diameter of
thread-setting plug gages shall be cleared beyond a P'8
width of flat either by an ex tension of the sides of the
thread toward a sharp vee or by an undercut no wider
than P/8.
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
r-P/8 Ref.
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x
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(a) Thraad-Sotting Plug for Maximum-Material Functional limit
and Functional Size GO Thread Gages
~
0
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ea.
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ro
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....
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(b) Thread Sfltting Plug for Minimum-Material Gages
and LO Functional Diameter Gages
FIG. 31
THREAD FORM OF TRUNCATED THREAD-SETTING PLUG GAGES
92
Copyright ASME lnlernationill
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME Bt.16M-1984
AN AMERICAN NATIONAL STANDARD
...u
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(a)Thread-Sotting Plug for Ma~timum-Materiol Functional limit
and Functional Size GO Thread Ga~JS$
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(b)Thread-Setting Plug for Minimum-Material GatJB$
and LO Functional Diameter Goges
FIG. 32
THREAD FORM Of FULL-FORM THREAD-SETTING PLUG GAGES
93
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
5.14 Plain Check Plug Gages for
5.13. 7 Pitch Diameter Limitation of Taper.
The permissible taper shall be back taper (largest diameter at entering end) and shall be confined within
the gage pitch diameter limits.
Thread Ring Gages
5.14.1 Purpose and Use. GO and NOT GO
plain check plug gages verify the minor diameter limits
of thread ring gages after the thread rings have been
properly set with the applicable thread-setting plug
gages.
5. 13.8 Incomplete Thread. The feather edge at
both ends of the threaded section of the setting plug
shall be removed. On pitches coarser than 0.8 mm not
more than one complete turn of the end threads shall
be removed to obtain a full-thread blunt start. See Fig.
2. On pitches 0.8 mm and finer, a 60 de g. chamfer from
the axis of the gage is acceptable in lieu of the blunt
start.
5. 14.2 Basic Design. The direction of the gage
tolerances on GO and NOT GO plain plug gages for
GO ring minor diameter and GO and NOT GO plain
plug gages for NOT GO ring minor diameter is as
follows: GO - tolerance plus; NOT GO - tolerance
minus. Class X tolerance is used on gages up to 5 mm
size, classY tolerance above 5 mm size (see Table 8).
5.13.9 lead Variations. In the case of truncated
setting plugs. the lead variations present on the fullform portion and the truncated portion of an individual gage shall not differ from each other by more
than 0.003 mm over any portion equivalent to the
length of the thread ring gage, or nine pitches, whichever is less. The specified tolerance shall be applicable
to the thread length in the mating ring gage or nine
pitches. whichever is smaller. The tolerance on lead
establishes the width of a zone, measured parallel to
the axis of the thread. within which the actual helical
path must lie for the specified length of the thread.
Measurements will be taken from a fixed reference
point. located at the start of the first full thread. to a
sufficient number of positions along the entire helix to
detect all types of lead variations. The amounts that
these positions vary from their basic (theoretical) positions will be recorded with due respect to sign. The
greatest variation in each direction [plus or minus (±)J
will be selected, and the sum of their values, disregarding sign, shall not exceed the tolerance limits
specified in Table 7.
5.14.3 Gage Blanks. For standardization and
economic reasons. the gaging members and handles
have been standardized for various size ranges (see
ANSI/ASME B47.1aM).
5.14.4 Identification. The GO and NOT GO
plain check plug gages for the GO thread ring gage
should be marked with metric nominal size, pitchtolerance class, GO and NOT GO diameters in millimeters, and GO MINOR DIAMETER CHECK
PLUG. The GO and NOT GO plain check plug gages
for the LO thread rihg gage should be marked with
metric nominal size, pitch-tolerance class. GO and
NOT GO diameters in millimeters. and LO M !NOR
DIAMETER CHECK PLUG.
EXAMPLES:
For GO ring: MR X 1-6g GO 6.878 ~OT GO 6.891
GO MI;o.;OR DIAMETER CHECK PLUG
For LOring: M8 X 1-6g GO 7.012 ~OT GO 7.025
LO MINOR DIAMETER CHECK PLUG
5. '13.1 0 l-lalf-Angle Variations. Variations in
half-angle shall be within the limits specified in Table 7.
5.15 Indicating Plain Diameter Gages- Major
Diameter of Product External Threads
(Table 1 -Gage 5.1)
5. 13.11 Identification. The GO thread-setting
plug gage shall be marked with metric nominal size,
pitch-tolerance class, GO, SETTING, PD, and GO
pitch diameter in millimeters.
5.15. 1 Purpose and Measuring Procedures.
The indicating plain diameter gage inspects the major
diameter, J 1 and h. of the external thread. After the
plain contacts of the indicating gage are set to a plain
diameter setting plug and the dial is read, the gage is
placed on the product thread major diameter for a
second reading. The difference in readings is applied to
the value oft he set master to obtain the major diameter
size.
EXAMPLE:
MH >< 1·6g GO SETTING PD7.J24
The LO thread-setting plug gage shall be marked
with metric nominal size, pitch-tolerance class, LO,
SETTING, PD, and LO pitch diameter in millimeters.
EXAMPLE:
M8 X t·6g LO SETTING PD7.212
94
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
5.15.2 Basic Design. Indicating gages have
three plain contacts at 120deg. or two plain contacts at
180 deg. The dimensions of segments or rolls are to
manufacturer's standard. See Fig. 33.
5.15.3 Identification. Indicating gages, assembled with proper contacts, should be marked with metric nominal size, pitch-tolerance class, major diameter
limits in millimeters, and MAJOR DIAMETER.
EXAMPLE:
M8 X l-6g 7.974-7.794 MAJOR DIAMETER
5.16 Indicating Gages to Check Minor
Diameter of External Thread
(Table 1 -Gage 5.2)
5.16.1 Purpose and Use. The maximum minor
diameter limit, K1 and K.2, of product external thread
is considered acceptable if the product accepts GO
thread gages. If further checking is required, the indicating gage with 55 deg. maximum included angle
thread contacts is used to check the minor diameter.
5.16.2 Basic Design. A thread indicating gage
with segments or rolls has a thread form of 55 deg.
maximum. There are usually three threads in segments
and three ribs on rolls. Sec Fig. 34.
5.16.3 Identification. Indicating gages, assembled with proper rolls or segments, should be marked
with metric nominal size, pitch-tolerance class, minor
diameter limits (customer's specifications} in millimeters, and MINOR DIAMETER EXTERNAL.
EXAMPLE:
M8 X l-6g (Minor diameter limits as specified by customer)
MINOR DIAMETER EXTERNAL.
5.17 Thread Micrometers
(Table 1 -Gages 6, 7. and 14)
5.17.1 Purpose and Use. Thread micrometers
with cone and vee anvils are used to inspect the minimum-material pitch diameter limit and size of external
thread. Micrometer can check 180 de g. ovality of pitch
diameterand taperofpitchdiarneter. Modified vernier
calipers are used similarly.
5.17.2
Basic Design. The depth of thread on
cone and vee is either approximately pitch diameter
contact or the LO limit profile. Measurements are
made in 0 mrn to 25 mm and 25 mm to 50 mm diameter
ranges. The smallest graduation is 0.01 mm.
ANSJIASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
5.18 Thread-Measuring Wires
(Table 1 -Gage 8)
5.18.1 Purpose and Use. Using a measuring
machine, product thread can be checked using three
measuring wires between product thread and parallel flat anvils of measuring machine. Wires are "best
size" thread wire contacting at the thread groove diameter, with two wires on one side and one wire 180
de g. around. This type of measurement checks the minimum-material groove diameter limit and size. By
rotating the product thread between wires, the 180 deg.
ovality of groove diameter is checked. Measuring at
different locations axially, the taper of the groove diameter is checked. It should be recognized that the
measuring force shown for measuring hardened thread
gages with wires may not be appropriate for softer
product thread materials due to the possibility of the
wires being forced into the surface of the thread flanks.
This would indicate a smaller thread size than what
actually exists: See Appendix B.
5.19 Optical Comparator and Toolmaker's
Microscope (Table 1- Gage 9)
5.19.1 Purpose and Use. The optical comparator magnifies and projects the thread profile on a
screen. For best profile image, the threaded item is
positioned so that the light is aligned with the thread
lead angle. Since the thread profile is defined in a plane
including the axis, a correction factor may be added to
the measured flank angle observed normal to the lead
angle. For most standard single lead threads, the
correction factor is less than 0 deg. 5 min. See A2.6.1.
Optical comparators are generally fitted with lenses
providing various magnifications between lOX and
IOOX. Profile dimensions are checked using appropriate linear and angular scales on the machine and by
the application of thread profile, radius, and other
. overlay charts. Other groove and ridge dimensions,
and axial plane pitch and lead may be checked. Major,
minor, and pitch diameters are ident!fied, then measured using table traverse readouts.
5.19.2 The toolmaker's microscope is similar in
function to the optical comparator but does not include screen projection or overlay charts. Magnifications are generally lower than those of optical comparators. Some microscopes have thread profile and
radius templates which are inserted in the eyepiece.
95· ........
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-19B4
AN AMERICAN NATIONAL STANDARD
Segments
Two or Three
Contacts
(a)
Rolls
Two or Three
e'-e{
--1-- - -
~-.;\o{
Contacts
f,-'i>~- -
I
I
ldl
(c)
FiG. 33
INDICATING PLAIN DIAMETER GAGE -MAX.-MIN.
MAJOR DIAMETER LIMIT AND SIZE
--96-
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
.
~
E
Contacts
'5"'
Total &egment contact
to be minimum 25%
of circumference
Zero lead Rolls
Two or Three
Contscts
FIG. 34 INDICATING DIAMETER GAGES-MAX.-MIN.
MINOA DIAMETER LIMIT AND SIZE
97
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
TABU: 14 CALIBRATION REQUIREMENTS AND STANDARDS FOR X TOLERANCE THREAD GAGES,
INDICATING GAGES, PLAIN GAGES, AND MEASURING EQUIPMENT FOR EXTERNAL
PRODUCT THREADS
Thread Gages and Measuring
Equipment (Note 1)
Calibration Requirements for Gages
and Measuring Equipment (Notes 2, 3)
--------
Selling Gages and Standards (Note 7)
-·-··----·--·-·· · - - - - -
Thread rings (ANSI/ASME B47.1aM)
1.1
GO ring
Pitch (also helical offset at split;
see A3.4), flank angles, minor
diameter, pitch diameter, taper
of pitch cylinder, straightness,
roundness, clearance at root (Note 6)
W thread-setting plug for GO;
X tolerance plain plug for minor
diameter for small thread sizes
1.2
LOring
Pitch {also helical offset at split;
see A3.4), flank angles, minor
diameter, pitch diameter, taper of
pitch cylinder, straightness,
roundness, clearance at root (Note 6)
W thread-setting plug for lO;
X tolerance plain plug for
minor diameter for small thread sizes
2 Thread snap gages
2.1
GO segments
Pitch, flank angles, minor diameter,
pitch diameter, taper, straightness,
clearance at root (Notes 4-6)
W thread-setting plug for GO
{Note 7)
2.2
lO segments
Pitch, flank angles, minor diameter
pitch diameter, clearance at root
{Notes 4-6)
W thread-setting plug for lO
{Not~ 7)
2.3
GO rolls (zero lead)
Pitch, flank angles, width of flat at crest,
taper of pitch cylinder on each roll,
parallelism of axes of rolls, Clearance
at root (Notes 4-6)
W thread-setting plug for GO
(Notes 7, 8)
2.4
lO rolls (zero lead)
Pitch, flank angles, width of flat at
crest, clearance at root (Notes 4-6)
W thread-setting plug for LO
{Notes 7, 8)
2.5
Minimum mat.erial,
pitch diameter type,
cone and vee
Pitch of vee, width of flat at crest,
height of thread {Notes 4-6)
W thread-setting plug for LO
(Notes 7, 8)
2.6
Minimum material,
thread groove diameter
type, cone only, "best
size" thread wire
Radius of contacts corresponding to
"best size" thread wire size
(Notes 4-6)
W thread-setting plug for lO
(Notes 7, 8)
Maximum plain
cylindrical GO ring for
major diameter
Taper, straightness, roundness,
diameter
Series of plain plug gages in 0.0025 mm
steps or direct diameter measurement with internal measuring
equipment using gage blocks equal
to the maximum major diameter
Plain cylindrical NOT
GO ring for major
diameter
Taper, straightness, roundness,
diameter
Series of plain plug gages in 0.0025 mm
steps or direct diameter measurement with internal measuring
equipment using gage blocks equal
to the minimum major diameter
3 Plain diameter gages
3.1
98
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GAGES AND GAGING FOR
ANSIIASME B1.16M·1984
AN AMERICAN NATIONAL STANDARD
METRIC M SCREW THREADS
TABLIE 141 CABJBRATION REQUIREMENTS AND STANDARDS FOR X TOLERANCE THREAD GAGES,
INDICATING GAGES, PLAIN GAGES, AND MEASURING EQUIPMENT FOR EXTERNAL
PRODUCT THREADS (CONT'D)
Tht·e~d Gages and Measuring
Equipment (Note 1)
4
Calibration Requirements for Gages
and Measuring fquipmenl (Notes 2, 3)
Selling Gages and Standards (Note 7)
3.2
Major diameter snap
type
Parallelism, flatness of contacts,
distance between contacts
Plain Z tolerance plug gage or gage
blocks with roll corresponding to
maximum major diameter or
direct measurement
3.3
Minor diameter snap
type (55 deg. maximum
included angle)
Pitch. diameter, included angle of
thread form. clearance form at
tips of snap contacts
Plain Z tolerance plug gage or gage
blocks equal to the maximum minor
diameter or direct measurement
3.4
Maximum and
minimum major
diameter snap type
Parallelism. flatness of contacb.
distance between contacts
Plain Z tolerance plug gage or gage
blocks with roll corresponding to
maximum or minimum major
diameter or direct measurement
3.5
Maximum and
minimum minor
diameter snap type
(55 deg. maximum
included angle)
Pitch, diameter. 55 de g. maximum
included angle of thread form.
clearance form at tips of
snap contacts
Plain Z tolerance plug gage or gage
blocks equal to the maximum or
minimum minor diameter or
direct measurement
lndirating thread gages
having either two contacts at
180 deg. or three contacts
at120dcg.
4.1
GO scgmems
Pitch, flank angles, minor diameter,
pitch diameter, taper. straightness,
clearance at root, minor cylinder
to pitch cylinder relationship
of segments for coaxiality
(Notes 4-6)
W thread-setting plug for GO
(Note 7)
4.3
GO rolb (zero lead)
Pitch, flank angles, minor diameter,
taper, straightness, parallelism of
axes of rolls to each other,
clearance of root (Notes 4-6)
W thread-setting plug for GO
Minimum material,
pitch diameter type.
cone and vee
Pitch, width of flat at crest. height
of thread (Notes 4-6)
W thread-setting plug for GO or
for basic pitch diameter or for
Minimum material.
thread groo\c diameter
type. cone only
"best size" thread
wire size)
Radius of contact (Notes 4-6)
Major didmeter and
pitch diameter runout
gage
Pitch and flank angles of thread
segments, straightness of plain
gages, major cylinder to pitch
cylinder, relationship of segments
ior coaxiality (Notes 4-6)
4.5
4.6
4.7
(Note~ 7, 8)
LO (Notes 7, 8)
W thread-~etting plug for
LO (Notes 7, 8)
None
99
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GAGES AND GAGING FOR
METRIC M ·scREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
CALIBRATION REQUIREMENTS AND STANDARDS FOR X TOLERANCE THREAD GAGES,
INDICATING GAGES, PLAIN GAGES, AND MEASURING EQUIPMENT FOR EXTERNAL
PRODUCT THREADS (CONT'D)
lADLE 14
Thread Gages and Measuring
Equipment (Note 1)
4.8
5
Differential segments
and roll~
Calibration Requirements for Gages
and Measuring Equipment (Notes 2, 3)
Setting Gages and Standards (Note 7)
GO profile of one pitch segment or roll
requires flank angles checked
GO full-form segments (see
4.'1 above)
GO full-form rolls (see 4.3 above)
Minimum-material. pitch diameter
type, cone and vee (see 4.5
above)
Minimum-material, thread
groove diameter type, cone
only "best size" thread
wire size (see 4.6 above)
Not required: special lead
standards and flank angle
standard> with generated
variation portion and
near perfect portion
Indicating plain diameter
gages
5.1
Major diameter type
Parallelism and flatness of contacts
(Note 5)
Plain Z tolerance plug gage for
GO or basic major diameter or
gage blocks
5.2
Minor diameter type
Pitch. diameter, 55 deg. maximum
included angle of thread form.
width of flat on crests
Plain Z tolerance plug gage for
basic minor diameter at radiusecl root
& Pitch micrometer with
standard contacts
[approximately LO
profile! cone and vee
Pit<.h. flank angles. Maximum error in
indicated measurements up to 25 mm
shall not exceed 0.003 mm lor pitches
up to 0.6 mm. 0.00•1 mm for pitches
greater than 0.6 mm and up to 1.75
mm, and 0.005 mm for pitches greater
than 1.75 mm. For measurements
greater than 25 mm. error may be
increa~ed by 0.001 rnm.
W thread-~etting plug for basic pitch
diameter. or GO pitch diameter
stand.Hd or LO !Note 7)
7
Pitch. flank angles, width of flat at crest.
height of thread. Maximum error in
indicated measurements up to 25 mm
shall not exceed 0.003 mm for pitches
up to 0.6 mm, 0.004 mm for pitches
greater than 0.6 mmand upto 1.75
mm, aml 0.005 mm for pitches greater
than 1.75 mm. For measurements
greater than 25 mm, error may be
increased by 0.001 mm.
W thread-setting plug for basic pitch
diameter. or GO. or LO (Note 71
Pitch micrometer with
modified contacts
(approximately pitch
diamP.tPr contact) cone anrl
vee
8
Thread measuring wires (''best
size" thread wire size) with
suitable measuring means
flatness and parallelism of spindle and
anvil faces. screw calibration,
measuring force
Calibrated "best size" thread
wire size measuring wires and
gage blocks
9
Optical comparator or
toolmaker's microscope with
suitable fixturing
Micrometer stage, magnification. radius
chart, protractor head (Note 4)
Gage blocks, plug gages, sine bar
100
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
CALIBRATION REQUIREMENTS AND STANDARDS FOR X TOLERANCE THREAD GAGES,
INDICATING GAGES, PLAIN GAGES, AND MEASURING EQUIPMENT FOR EXTERNAL
PRODUCT THREADS (CONT'D)
------
TAGLE 14
Thread Gages and Measuring
Equipment (Note 1)
Calibration Requirements for Gages
and Measuring Equipment (Noles 2, 3)
-----------·----------------------· - - · · - · - - - · - - -
Selling Gages and Standards (Note 7)
10
Profile tracing equipment with
suitable fixturing
Use manufacturer's instructions to
test stylus tra1 erse and
electronic amplification
Special angle block supplied with
instrument
11
Lead measuring machine with
suitable fixing
Traversing system. straightness of ways,
stylus radius
Lead standard, gage blocks
12
Helical path attachment used
with GO type indicating gage
Lead. flank angles, taper, straightness,
clearance at root (Notes 4, 5)
Lead standard
13
Helical path analyLer
Use manufanurer's instructions to test
the mechanical and electronic
features
Lead standard
14
Plain micromt•ter and calipers,
modified as required
Maximum error in indicdted
measurements up to 25 mm shall not
exceed 0.003 mm for pitches up to
0.6 mm, 0.004 mm for pitches greater
thdn 0.6 mm and up to 1.75 mm, and
0.005 mm for pitches greater than 1.75
mm. For measurements greater than
25 mm, error may be increased by
0.001 mm.
Gage blocks, or calibrated plain
plug gages
15
Surf~ce measuring equipment
Usc manufacturer's instructions for
calibration procedures
Precision roughness standard
Use manufacturer's instructions for
calibrJtion procedures
Precision gla~s sphere, roundness
magnification standard
16> Roundness equipment
NOTES:
(1); See Table 1.
(2):· Use applicable X. W, or Z gage tolerance.
(3) Taper, straightness, including bellmouth barrel shape and hourglass shape, and roundness shall be within the X, W, or Z tolerance
depending on the element measured. In other words, if these features are measured at pitch cylinder, the tolerance for pitch
diameter applies.
(41 Use manufacturer's recommended procedures for gage for check111g the thread features and alignment of indicating gage
components.
(5) New rolls and segments shall be within X tolerance. Worn rolls or segments shall be replaced when a single thread elemenr
wears outside of X tolerance,
'
(6) Pitch diameter is usually transferred from thread-setting gages.
(7) When the gage is set by adjustment based upon actual measured pitch diameter of the setting master, the master shall meet
all W tolerances except for pitch diameter, which may have a tolerance increased to X.
(8) Pitch diameter size on some adjustable thread snap gages and indicating thread gages may be set from one or more of
the following:
(a) Z tolerance plain cylindrical plug gage
(b) gage blocks
(c) direct measurement
{d) specially designed transfer standards
Rolls must be qu~lified for setting from their outside diameters.
101
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL SIANDARD
TAUlE 15 CAIJBRAT!ON REQUIREMENTS AND STANDARDS FOR X TOLERANCE THREAD GAGES,
INDICATING GAGES, PLAIN GAGES, AND MEASURING EQUIPMENT FOR INTERNAL
PRODUCT THREADS
Thread Gages and Measuring
Equipment (Note 1}
---
Calibration Requirements lor Gages
and Measuring Equipment (Notes 2, 3)
Setting Gages and Standards
-------------------~---·--·----·------·-----····-·------·----
Thread plug (ANSI/ASME B47.1aM)
"1.1
GO plug
Lead. flank angles. major diameter, pitch
diameter, taper, straightness,
roundness, clearance at root
Three "best size" thread wires.
gJge blocks
1.2
HI plug
Lead, flank angles, major diameter.
pitch diameter, taper. straightness,
roundness, clearance at root
Three "best size" thread wires,
gage blocks
Thread ;nap gage;
3
2.1
GO segments
Lead, flank angles, major diameter,
pitch diameter. taper. straightness.
clearance at root (Notes 4, 5)
Solid W thread-setting ring for GO
(ii direct measurement of pitch
diameter is not made) (Notes 6, B)
2.2
HI segments
Pitch, flank angles, major diameter,
pitch diameter. de.u,1nce at root
(Notes 4, 5)
Solid W thread-setting ring for HI
(if direct measurement of pitch
diameter is not made) (Note; 6, B)
.U
GO rolls (zero lead)
Pitch, flank angles. width of flat at crest.
tape·r of pitch cylinder on each roll,
straightness. parallelism of
assembled rolls, clearance at
root (Notes 4, 5)
Solid W thread-setting ring for GO
(Notes 6, B)
2.4
HI rolls (ZP.ro lead)
Pitch. flank angles. width of flat ,tt crest.
clearance at root (Notes 4, 5)
Solid W thread-setting ring for HI
{Notes 6, B)
2.5
Minimum material,
pitch diameter type.
cone and vee
Pitch, width of flat at crest, height of
thread (Notes 4. 5)
Solid W thread-setting ring for HI
(Notes 6. Bl
2.6
Minimum material,
thread groove diameter
type, cone only ("best
size" thread balls)
Radius of contacts (Notes 4, 5)
Solid W thread-setting ring for HI
{Notes 6, B)
Plain diameter gages
3.1
Minimum plain
cylindrical plug for
minor diameter
Taper, straightness, roundne;s,
diameter
Gage blocks
3.2
Minimum major
diameter snap type (55
deg. maximum included
angle!)
Pitch. included angle, dimension over
segments or rolls. width of flat at
crests (Note 4)
Plain Z tolerunce ring gage for GO
major diameter or gage blocks
between jaws
3.3
Minimum minor
diameter snap type
Taper, waightness or coaxiality of
rylindrical segments or rolls.
dimension over segments or rolls
(Note 4)
Plain Z tolerance ring gdge for GO
minor diameter or gage blocks
between jaws
102
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ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
GAGES AND GAGING FOR
METRIC M SCREW THREADS
TABU 15 CALIBRATION REQUIREMENTS AND STANDARDS FOR X TOLERANCE THREAD GAGES,
INOICAliNG GAGES, PLAIN GAGES, AND MEASURING EQUIPMENT FOR INTERNAL
PRODUCT THREADS (CONT'D)
Thread Gages and Measuring
Equipment (Nole 1)
Calibration Requirements lor Gages
and Measuring Equipment (Notes 2, 3)
---------------------------------
Selling Gages and Standards
3.4
Maximum and
minimum major
diameter snap type
(55 deg. maximum
included angle)
Pitch, included angle, dimension over
segments or rolls, width of llat at
crests (Note 4)
Plain Z tolerance ring gage for GO
major diameter; plain Z tolerance
ring gage for HI major diameter
or gage blocks between jaws
,3.5
Maximum and
minimum n1inor
diameter snap type
Taper, straiaghtness, coaxiality of
cylindrical segments or rolls,
dimension over segments or rolls
(Note 4)
Plain Z tolerance ring.gage for GO
minor diameter; plain Z tolerance
ring gage for HI minor
diameter or gage blocks
between j<1ws
4 Indicating thread gages having
either two contacts at
180 deg. or three
contacts at 120 deg.
4.1
GO segments
Lead, flank angles, major diameter,
pitch diameter. taper. straightness,
clearance at root, major cylinde.r to
pitch cylinder. relationship of
segments for coaxiality
(Notes 4, 5)
Solid W thread-setting ring for GO or
basic pitch diameter (Notes 6-8)
4.3
GO rolls (zero lead)
Pitch, flank angles, major diameter,
taper, straightness, clearance at
root, parallelism of axes of rolls
to each other (Notes 4, 5)
Solid W thread-~etting ring for GO
(Notes 6, 9)
4.5
Minimum material,
pitch diameter type,
cone and vee
Pitch, width of flat at crest, height
of thread (Notes 4, 5)
Solid W thread-setting ring for GO or
HI or basic pitch diameter
(Notes 6, 9)
4.6
Minimum material,
thread groove type,
cone only
Radius of contacts (Notes 4, 5)
W thread-setting ring for HI
(Notes 6, 9)
Minimum material.
thread groove type,
three "best size"
thread balls, two ball
contact spaced four
pitches
Ball diameter (Notes 4, 5)
Plain Z tolerance ring gages whose
diameter is basic pitch diameter
plus l-'1 the "best size" thread
ball size
Minor diameter anti
pitch diameter runout
gage
Straightness of pi~ in gage segment,
pitch, flank angle, straightness of
thread segment, minor cylinder
to pitch cylinder, relationship
of segments for coaxiality
(Notes 4, 5)
None
4.7
103
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
TABlE 15 CALIBRATION REQUIREMENTS AND STANDARDS FOR X TOLERANCE THREAD GAGES,
iNDICATING GAGES, PLAIN GAGES, AND MEASURING EQUIPMENT FOR INTERNAL
PRODUCT THREADS (CONT'D)
Thread Gages and Measuring
Equipment (Note 1)
•LB
Differential segment
or roll ·
C.liibration Requirements for Gages
and Measuring Equipment (Notes 2, J)
Selling Gages and Standards
CO profile of one pitch in length,
segment or roll. requires flank
angles checked
CO full-form segment (see 4.1
above)
CO full-form roll (see 4.3 above!
Minimum material, pitch diameter
type, cone and vee, (see 4.5
above)
Minimum material, thread groove
type, cone only, (see 4.6 above)
Not required: special internal lead
standard and internal flank angle
standard with generated errors
portion and near perfect portion
Pitch, included angle of flanks,
width of flat on crests
Plain Z tolerance ring gage for basic
major diameter or GO major
diameter, gage blocks, direct
measurement
Straightness, parallelism of contacts
(Note 5)
Plain Z tolerance ring gage for basic
minor diameter, gage blocks, direct
measurement
Internal pitch micrometer
with standard contilcts
(approximately HI profile)
cone and vee
Pitch, flank angles, maximum error in
indicated measurement in the
micrometer head shall not exceed
0.005 mm
Solid W thread-setting ring gage for
basic pitch diameter. measurement
over wires (Note 6)
Internal pitch micrometer
with modified contacts
(approximately pitch
diameter contact) cone
and vee
Pitch, flank angles, width of flat at crest.
height of thread. Maximum error in
indicated measurement in the
micrometer head shall not exceed
0.005 mm
Solid W thread-setting ring gage for
basic pitch diameter (Note 6)
Thread meilSUring ball with
suitable measuring means
Flatness and parallelism of internal
anvils, screw calibration, measuring
force
Gage blocks, calibrated "best size"
thread balls
9 Optical comparator or toolmaker's microscope with
suitable fixturing and cast
replica
Micrometer stage, magnification, radius
chart. protractor head (Note 4)
Cage blocks, plug gages, sine bar, stage
micrometer
10
Profile tracing equipment
with suitable fixturing
Use manufacturer's instructions to test
stylus traverse and electronic
amplification
Special angle block supplied with
instrument
11
lead measuring machine with
suitable fixturing
Traversing system, straightness of ways,
stylus radius
Lead standard gage blocks
lndic~ting plain diameter
gages
5.1
Major diameter type
(55 deg. maximum
included angle)
5.2
6
'0
Minor diameter type
104
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSIIASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
TABLE 15 CALIBRATION REQUIREMENTS AND STANDARDS FOR X TOLERANCE THREAD GAGES,
INiJICATH'IJG GAGES, PLAIN GAGES, AND MEASURING EQUIPMENT FOR INTERNAL
PRODUCT THREADS (CONT'D)
Thread Gages .md Measuring
Equipment (Note 1)
Calibration Requirements lor Gages
and Measuring Equipment [Noles 2, J)
Selling Gages and Sla ndards
12
Helical path analyzer
Use manufacturer's instructions to test
the mechanical and electronic
features
13
Plain internal micrometer and
calipers modified as re11uired
Maximum error in indicated measurement in the micrometer head shall ·
not exceed 0.005 rnm
Gage blocks, or calibrated plain
plug gages
14
Surface measuring equipment
Use manufacturer's instructions for
calibration procedures
Precision roughness standard
15
Roundness equipment
Use manufacturer's instructions lor
calibration procedures
Precision glass sphere, roundness
magnification standard
NOTES:
See Table 2.
(2) Use applicable X, W, or Z gage tolerance.
(3) Taper, straightness, including bell mouth barrel shape and hourglass shape, and roundness shall be within the X, W, or Z tolerance
depending on the element measured. In other words, if these features are measured at pitch cylinder, the tolerance for pitch
diameter applies.
(41 Use manufacturer's recon;rnended procedures for gage for checking the thread features and alignment of indicating gage
components.
(5) New rolls and segments shall be within X tolerance. Worn rolls or segments shall be replaced when a single thread element wears
outside of X tolerance.
(6) Pitch diameter is usually transferred from thread-setting gage.
(7) When the gage is set by adjustment based on actual measured pitch diameter of the setting master, the master shall meet all
W tolerances except for pitch diameter. which may have a tolerance' increased to X.
(8) Pitch diameter size on some types of adjustable gages may be set from Z tolerance plain ring gages or direct measurement. Rolls
must qualify for setting from their outside diameters.
(9) Pitch diameter size may be set by direct measurement over wires on 180deg. segments, with specially designed transfer standards
or by Z tolerance plain ring gages when rolls are qualified for setting from their outside diameters.
(1)
TABLE 16
CALIBRATION REQUIREMENTS FOR THREAD- AND PLAIN-SETTING CAGES
Selling Gage
Calibration Requirements
GO, LO and W thread-~etting plug gage, truncated
and full form
L!"ad. flank angi!"s. major diameter. pitch diameter, taper, Waightness and
roundness oi major and pitch cylinders. clearance at root. coaxiality of major
cylinder with pitch cylinder
GO. HI and solid W thread-setting ring gage
lead, flank angles, minor diameter, pitch diameter (Note 1), taper, straightness
and roundness of minor and pitch cylinders, clearance at root, coaxiality of
minor cylinder with pitch cylinder
Plain Z tolerance plug and ring gages
Diameter. taper, straightness, and roundness
-·------··-------·--·-·----
NOTE:
(1) Pitch diameter of an internal thread, measured by "best size" thread ball contacts, will be 0.0025 mm to 0.005 mm larger than the
pitch diameter, gaged indirectly by a snug-fitting master thread plug gage or locked segments of an indicating gage which have
been measured by "best size" thread wire method. This difference is due to the functional size of the master thread plug gage or
locked segments which unavoidably have small deviations in l!! .. u, flank angle, taper, and roundness.
105
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI!ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
5.20 Profile Tracing Instrument
(Table 1 -Gage 1 0)
5.20.1 Purpose and Use. The instrument checks
thread contours to an accuracy of0.005 mm for 25 mm
of hori7ontal and 2.5 mm vertical travel at IOOX
magnification. The chart paper trace may oe analyzed for elements of the thread profile, including depth,
crest width. lead angle, and radius at root of thread.
Indicator
gage
5.21 Electromechanical lead Tester
(Table 1 -Gage 11)
5.21.1 Purpose and Use. The electromechanical lead tester consists of a precision, direct-reading
headstock in combination with an axially movable
carriage supporting a sine bar, two work-mounting
centers. electronic thread locating head with a ball
point, and a milliammeter for registering the ce.nter
position of the ball probes in the thread groove. Ball
point stylus approximates the "best size" thread wire
radius. To extend lead measurements beyond 25 mm.
gage blocks in 25 mm steps are used to displace the
screw thread. Lead measurements accurate to 0.0006
mm are read directly from micrometer scales on headstock.
Lower gaging element
FIG. 35 INDICATING GAGES - HELICAl
PATH ATTACHMENT USED WITH GO TYPE
INDICATING GAGE
5.22 l-lelical Path Attachment Used With
GO Type Thread Indicating Gage
(Table 'I -Gage 12)
5.22.1 Purpose and Use. To observe the presence of helical path variation with a GO type indicating
gage, Fig. 35, the following procedure is used:
(a) a suitable means is used to lock (restrict) axially
the lower gaging element;
(b) the top gaging element is allowed to float freely
(axially) on its own stud and at least one full pitch away
from the frame;
(c) the product to be inspected is inserted into the
gaging elements so that the conditions described in (a)
and (b) above arc met;
(d) an indicator (usually attached to the comparator) is positioned so that the indicator contact point
locates at the face of the free floating (top) gaging
element:
(e) the product is turned one full revolution. The
presence of helical path variation causes the top gaging
element to displace itself axially on its own stud.
(f) the full-indicator movement is observed.
5.23 Helical Path Analyzer
(Table 1 -Gage 13)
5.23.1 Purpose and Use. A helical path analyzer is a self-contained unit consisting of a motordriven headstock. tailstock. electronic gaging head.
sine bar. follower, pitch blocks, selsyn transmitter for
chart recorder. and operator control panel.
The external workpiece to be measured is mounted
between centers. The motor-driven headstock rotates
the part through three revolutions at one setting. At the
same time. this rotary motion is transmitted to the
chart drive of the recorder. Simultaneously. the driving
ribbon running off the headstock actuates the sine bar
laterally on a ball slide in direct proportion to the
spindle rotation. The sine bar is set previously to the
proper angle for the particular pitch using the applicable pitch block. The electronic gage head floats
axially on ball slides, the movement being controlled
106
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GAGES AND GAGING FOR
METRIC M SCREW THREADS
ANSI/ASME B1.16M-1984
AN AMERICAN NATIONAL STANDARD
by constant spring pressure of the sine bar follower
against the sine bar.
The chart gives readings in lead variation and socalled drunken thread variation. Chart division is
equal to 0.0005 mm per division.
rotary tables and precision spindles. A special stylus
coupled to an electric unit records the out-of-roundness on a circular chart as it traces around the cylindrical surface of the workpiece. The instrument provides a series of magnifications for stylus displacement, a filtering system for isolating lobing from surface irregularities, various means for centering the
amplified stylus trace on the polar chart, and a selection of rotating speeds. For details on measuring and
for other methods for checking roundness, see ANSI
B89.3.1, Measurement of Out-of~Roundness.
5.24 Surface Roughness Equipment
(Table 1- Gage 15)
5.24.1 Purpose and Use. Measurement of surface roughness on screw thread flanks is usually made
with an instrument which traverses a radiused stylus
across the lay. The stylus displacement due to the surface irregularities is electronically amplified and the
meter reading displays the arithmetical average roughness height in micrometers (see ANSI B46.1, Surface Texture: Surface Roughness, Waviness, and Lay).
Some instruments produce a chart of the traced path
which shows the peak-to-valley heights of the surface
irregularities. Special fixturing is required to position
and guide stylus over thread surface.
5.26 Miscellaneous Gages and
Gaging Equipment
5.26.1 The description of the external gages, as
noted in 5.1 through 5.25. is definitely not a complete
catalog of the various types available for inspection
purposes. The gages not described above may be used
provided they adhere to the standard thread practice
noted in this Standard (i.e .. truncation, form of thread,
tolerances, etc.) and have producer and consumer
agreement.
5.25 Roundness Equipment
{Table 1 -Gage 16)
5.25.1 Purpose and Use. There are two types of
precision roundness measuring instruments; precision
107
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APPENDIX A
CALIBRATION AND INSPECTION OF liMIT GAGES,
SNAP GAGES, INDICATING GAGES, AND MEASURING INSTRUMENTS
(This AppendiK is not part of ANSI/ ASME B 1.16M-1984, and is included for information purposes only.)
A1 GENERAL
using a hardened steel stylus with a radius matching
the "best size" thread ball. The stylus, which contacts
both the leading and following flanks, engages selected
complete threads at the pitch line in a direction parallel to the axis of the gage.
The measurements are made at both ends oft he gage
and one or more positions in between along one line;
then they are repeated along another line at 180 deg.
around the gage. The mean of the two sets of readings
is taken in order to eliminate the effect of any misalignment of the measuring axis with respect to the
gage axis. The importance of pitch measurement is to
estimate its effect on functional size. The diameter
equivalent of a pitch variation of 0.002 mm is 0.0035
mm.
Since gages have very small pitch tolerances, the
measurement of pitch by optical projection is not
recommended.
There are more ways to calibrate gages than those
briefly described herein. Since this Appendix covers
only the most commonly used designs of limit. snap.
and indicating gages, the inspector may have to modify
the method described for it to become applicable. Special fix turing may be necessary for the small and large
gages.
Specially designed screw thread indicating gages
may at times be more practical for making measurements on thread gage elements than the cumbersome
all-purpose laboratory instruments which may lack
adequate fixturing to do an efficient job.
Before one calibrates, sets, or uses limit, snap, and
indicating gages, they should be cleaned and examined
visually for nicks, burrs, and foreign matter, using a
mm1mum of lOX magnification. Defects must be
corrected.
A2.3 Helix Variation Measurement
A2 THHEAD PLUG GAGE CALIBRATION
GO and Hl
GO and LO
GO and LO
Helical variation may be measured with helix measuring machines or on special fixtured indicating
gages. Manufacturer's instructions should be used.
Thread Plug Gages
Truncated Setting Plug
Thread Gages
Full-Form Thread-Setting
Plug Gages
A2.4 Major Diameter Measurement
The measuring instrument is set with gage blocks,
cylindrical standards. or cylindrical· standards and
gage block combination which approximate the major
diameter size. Then the outside diameter of the thread
is placed between parallel anvils of a measuring machine or micrometer. The measuring faces are brought
into contact with the threads using the specified
measuring force. Additional readings are taken along
the axis and around the gage to verify that the variations in roundness and taper are within the major
diameter tolerance.
A2.1 External Pitch Diameter Measurement
The formula and method of measuring pitch diameter on thread plug gages are described in Appendix B.
A2.2 Pitch Variation Measurement
Only those thread plug gages that have their centers
intact can be mounted on centers for evaluation. The
measurements are made on a pitch-testing machine by
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TABLE A1
A2.5 Thread Form
Thread form is checked by either optical projection
or toolmaker's microscope. After the recommended
magnification is selected, the profile may be compared
to thread templates, and the root radius may be com. pared to a series of radii on a chart. The truncation,
width of flat, .and root clearance can be measured by
using the micrometer screws to translate the image of
the thread feature with respect to cross lines in the
projector of hairlines in the microscope.
MINIMUM MAGNIFICATION
Pitt:h, mm
More than 1.75
1.75-0.6
0.6 and less
Minimum
Magnification
20X
sox
100X
maximum conical contacts with radius or small flat
tips are used. Gage axis must be mounted normal to the
measuring screw axis. A gage block combination corresponding to the basic minor diameter should be used
to set the measuring screw. Optical projection may be
used also.
A2.6 Flank Angle Measurement
A2.6.1 If both centers are available, the flank
angles may be measured by optical projection or toolmaker's microscope using magnifications shown in
Table Al.
The plug gage is mounted on the centers in a fixture
·which can be tilted to the helix so that both flanks are
in focus. See corrective angles shown in Table A2.
The leading and following 30 deg. angles are each
measured with respect to the major cylinder or axial to
the thread axis. The protractor head should read out to
I min of arc. The cross line or hairline is set parallel to
the thread feature permitting a very narrow slit of light
between. If the thread flank is not straight, the inspector may either position the line to average out the
flank irregularities or measure both the addendum and
dedendum flank angles.
A3 THREAD RING GAGE INSPECTION
GO and LO
GO and HI
Thread Ring Gages
Thread-Setting Ring Gages
A3.1 Internal Pitch Diameter Measurement
A3.1.1 Measurement of internal pitch diameter
has seldom been practiced in the United States because
instrumentation has not been readily available. Thus,
the pitch cylinder is transferred to split ring gages from
the GO and LO thread-setting plugs by adjustment.
Solid working and setting ring gages are sized by lapping until a light drag is noticed as they are screwed on
the setting plugs. Sizes under 5 mm can only be gaged
with plug gages.
A2.6.2 Profile tracing equipment is available for
making profile charts of each flank on 2.5 mm and
larger pitches.
A3.1.2 The measured pitch diameter on rings fitted to a setting plug may be 0.0025 mm to 0.005 mm
larger than the measured pitch diameter on the plug
because the pitch d'iameter equivalents from permissible pitch. lead, and flank angle tolerances on matched
plug and ring cause some unavoidable discrepancy.
A2.7 Runout Between Major Cylinder
and Pitch Cylinder
The fixed anvil of the measuring instrument or micrometer engages the major cylinder of the gage, and
the movable anvil straddles two thread-measuring
wires which are pressed against the pitch cylinder with
a force appropriate for pitch diameter measurement.
This reading is taken and is followed by a series of
readings obtained by rotating the threaded gage until
the maximum and minimum values are found. The
maximum difference in measurements shall be within
the runou t tolerance between the major cylinder and
pitch cylinder.
A3.1.3 Measurement of internal pitch diameter
using" best size'' thread ball is restricted to sizes from
5 mm and larger. It is measured with ball contacts
mounted to caliper jaws and coupled to an indicating
gage. One jaw has a fixed ball and the other jaw a pair
of floating balls with center spacing of two or more
pitches. The caliperja ws are usually set to zero on an X
tolerance plain ring whose diameter is the sum of the
basic pitch diameter of the gage plus one-half the "best
size" thread ball diameter. The ball contacts are
brought in contact with the flanks of the internal
thread. A series of measurements are made around the
gage at both ends and in the middle. The indicator
A2.9 Minor Diameter Measurement
Minor diameter can be measured with measuring
machine or micrometer, provided special 55 deg.
- 110
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TABLE A2 60 deg. INCLUDED THREAD ANGLE
Helix Angle
de g.
min.
2
2
2
10
20
30
40
2
so
2
2
3
3
3
3
3
3
10
20
30
40
50
4
4
10
20
30
40
50
5
5
5
5
5
5
10
20
30
40
50
4
4
4
4
6
6
6
6
6
10
20
30
40
6
so
7
7
7
7
7
7
10
20
30
40
50
6
8
8
6
8
8
10
20
30
40
50
Helix Angle
Correction
deg.
min.
de g.
0
54
4
14
24
36
48
9
9
so
2
2
2
2
3
3
2
16
31
47
4
21
10
10
10
10
10
10
10
20
30
40
50
3
3
4
4
11
11
11
11
11
10
20
30
40
5
30
56
16
35
56
10
11
5
6
6
6
7
40
2
27
31
17
12
7
43
12
8
8
9
9
10
10
10
37
5
35
5
35
13
13
13
13
10
20
30
40
50
11
11
12
12
6
38
11
46
20
55
14
14
14
14
14
14
10
20
30
40
50
31
15
4
'13
1.1
14
15
·15
16
17
17
min.
9
9
10
20
9
9
30
12
12
12
12
13
13
40
Correction
deg.
min.
18
19
19
20
21
21
23
4
46
29
22
42
23
28
15
2
12
57
24
25
25
26
so
so
27
28
29
30
30
31
28
19
11
2
55
47
10
20
30
40
50
32
33
34
35
36
37
42
37
33
29
27
25
38
23
39
23
40
41
42
43
25
25
26
30
44
45
46
47
48
50
33
37
42
47
55
2
51
10'
38
8
46
24
2
42
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A3.6 Thread Form
reading gives the variation from the size to which the
gage was set.
Casts made of nonshrinking and nondeforming material such as dental plaster, selected resins. and
silicone are necessary to evaluate thread form. The
profiles are examined by optical projection or by
toolmaker's microscope. Thread form templates are
used for comparisonpurposes. Also. truncation. width
of flat. and root clearance can be measured with the
micrometer-driven table.
A3.2 Internal Pitch Variation M~asurement
The ground faceofthethread ring gage is clamped to
a face plate and mounted normal to the measuring axis
of the pitch-te~ting machine. A modified stylus with
"best size" thread ball radius is needed to contact the
internal threads. Measurements are made along one
line parallel to thread axis at two or more intervals. and
then these same intervals are measured on another
line after rotating the gage 180 deg. The means of the
variations of corresponding intervals arc taken to
eliminate the effect of misalignment of measuring axis
with gage axis.
A3. 7 Flank Angle Measurements
Casts arc required. They are mounted with plasticine
to a fixture which can be tilted in the field of the optical
projector or toolmaker's microscope. Further details
are given in A2.6. Profile tracing equipment is available
for making profile charts of each flank angle on 2.5 mm
pitch and larger. Manufacturer's instructions describe
the process.
A3.3 Helix Variation Measurement
Helical variations arc measured on a special fixtured
indicating gage. Manufacturer's instructions should be
used.
A3.8 Major Diameter Measurement
Threaded segments with 55 deg. maximum included
angles and slightly truncated at the crests are used with
an internal indicating gage. The segments are set to a
plain ring gage or to the inner sides of parallel jaws
attached to a gage block combination equivalent to the
basic major diameter of the ring gage. The thread ring
gage is explored for maximum and minimum diameter.
A3.4 Helix Offset Measurement on Adjustable
Thread Ring Gages
When an adjustable thread ring gage is reset. the
helix offset at the split line must be checked and may
not exceed the X tolerance for pitch. One way to
measure the misalignment is to screw the adjustable
ring partially onto its setting plug. which is clamped to
a vee block on a surface plate. With the face of the ring
gage parallel to the surface plate. allow the spherical
probe of an electronic height gage to contact the
exposed thread flank near the edge of the slit. Note the
reading. Next, slowly rotate the ring so that the probe
crosses the slit and rests on the thread flank again and
note the reading. The difference in readings shall not
exceed X tolerance for lead. Sometimes the offset can
be realigned by resetting and gently tapping it into
alignment and relocking the gage.
A3.9 Runout Between Minor Cylinder
and Pitch Cylinder
Horizontally clamp handle end of setting plug in vee
block which is clamped on a surface plate. Next, screw
thread ring gage part way onto plug. Lubricate threads
if there is a snug fit. Position ball contact of electronic
height gage on the exposed minor cylinder of the ring
gage. Next. slowly rotate ring to obtain the full-indicator reading for the runout.
A3.5 Minor Diameter
A4 PLAIN PLUG GAGE CALIBRATION
There are varieties of internal gages with plain
cylindrical segments coupled to mechanical and electronl.c indicators which are suitable for the measurement. The indicating gages are set to a master gage
mad~ witl1 parallel jaws attached to gage block combinarions corresponding to the basic minor diameter.
Mea:surements are made to locate the maximum and
mini'mum diameters to prove that the ring minor
diameter is within tolerance.
GO and NOT GO
GO and NOT GO
Plain Plug Gages, Z Tolerance
Plain Setting and Check Plug
Gages. X and Y Tolerances
A4.1 Outside Diameter Measurement
A4.1.1 The Z tolerance plug gage is measured
between Oat parallel contacts of a micrometer which
has a resolution of 0.001 mm. The micrometer is set
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with a tolerance Grade 3 gage block close to the size of
the plug to minimize error in micrometer screw. Readings around and along the plug are taken to verify that
the gage is within Z tolerance.
gage block sets must meet the requirements specified in
ANSI/ ASME B89 .l. 9M-l984, Precision Gage Blocks
for Length Measurement (Through 20 in. and 500 mm).
The small displacement between ring gage diameter and
master gap is read on the meter. Measurements are taken
around the gage, near the ends, and in the middle. The
measuring instrument should have a readout of at least
0.00025 mm. A referenced position at the middle of the
bore is used to index the out-of-roundness check as described in A4.1.2.
A4.1.2 The X or Y tolerance plug gage is measured
between nat parallel anvils of a measuring machine
which has a resolution to 0.00025 mm or less, with a
measuring force of 4.5 N. The natness and parallelism
of the anvils should be within 0.00025 mrn. The calibration history of the measuring screw should not exceed
0.00075 mm. The measuring machine anvils arc set
with a tolerance Grade 3 gage block combination
which corresponds to the marked diameter of the plug
gage. Measurements are made around the plug near
the ends and middle to determine that ovality, out-ofroundness. barrel shape, and taper arc within tolerance. Also, one measured diameter is marked, and this
mark is used as the starting position for generating a
roundness chart on a roundness testing instrument for
compliance to tolerance. Roundness is assessed by the
minimum circumscribed circle method on the chart.
The out-of-roundness is the radial separtion between
the minimum circumscribed circle and the maximum
inscribed circle. Refer to ANSI B89.3.1. Measurement
of Out-of-Roundness, for details on rouRdness
measurement.
A6 PlAIN SNAP GAGES
GO and NOT GO plain snap gages for external
major diameter check are set with plain Z tolerance
plug gages. When the adjustable anvil is locked, there
should be a very light drag felt when plug gage or roll is
pushed between anvils for its entire travel. If this does
not occur, anvils are worn out of parallel and should be
relapped. The snap may be set with gage blocks and
roll whose combined thickness equals the major diameter limit. When the adjustable anvil is locked, the
small roll should have a very light drag when moved
across the anvil.
A7 ROllS WITH ZERO lEAD THREAD
FORM USED ON SNAP AND
INDICATING GAGES
A5 PlAIN RING GAGE CALIBRATION
GO and NOT GO
GO and NOT GO
~5. '!
Rolls may be checked for thread form and size by
optical projection (see A2.5 and A2.6). Pitch is measured as described in A2.2. New rolls should be manufactured to X tolerances. Worn rolls should be replaced
when a single thread element wears outside of X
tolerance.
Plain Ring Gages, Z Tolerance
Plain Setting Ring Gages, X
Tolerance
Diameter Measurement
·: A5. 1.1 The Z tolerance ring gage is measured with
internal indicating gage or measuring instrument which
has a resolution of 0.00 I mm. The measuring device is
usually set with a master gap produced by clamping
ja w.5 tot he selected gage block combination. Measurements Me taken around the bore near ends and in the
middle.
AB INSPECTING PERIPHERAl
CONTACTING SEGMENTS ON
INDICATING GAGES
A8.1 Inspection of the Threaded Section
Used on External Product Threads
A8.1.1 Straightness (Taper. Bellmouth, and
Barrel Shape)
(a) Using the last three threads of the .full~(orm
portion of the truncated type setting plug (handle end
on tapcrlock blanks), engage the first three threads on
one end of the segments. Note the reading.
(h) Using the same procedure, engage the la.\'t three
threads on the other end of the segments. Note the
reading.
A5. '1.2 The X tolerance ring gage is measured over
two radius contacts on an internal measuring instrument. Internal measuring procedure is given in ANSI
B89 .I .6, Measurement of Qualified Plain Internal Diameters for Usc as Master Rings and Ring Gages. The
measuring device is set with a master gap produced by
clamping flat parallel jaws on the gage block combination corresponding to the ring gage dimension.
The gage blocks and the jaws which arc accessories to
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A8.1.5 Minor Cylinder to Pitch Cylinder Relationship of Each Segment
(a) With each like coded segment, measure from its
mounting hole over the outside diameter of a plain
plug whose diameter is that of the specified maximum
minor diameter and which is resting on the minor
diameter of the segment. Note the two readings.
(h) With each like coded segment, measure from its
mounting hole over the outside diameter of the W
tolera nee GO thread plug- full-form section -as it
rests in the segment thread. Note the readings.
The differences between matching sets of readings
from steps (a) and (b) for each segment must be within
the X tolerance for minor diameter.
(c) Repeat step {a) using.fint three threads of the
truncated portion of the plug {opposite the handle end
on taperlock blanks). Note the reading.
(d) Repeat step {b) using the first three threads of
the truncated portion of the plug. Note the reading.
Indicated differences exceeding X tolerance for
pitch diameter between reading (a) and (b) or (c) and
(d) reveal the segments as having an end-to-end
straightness deviation.
l\OTE: More <.lcfinitivc analy~is for hell mouth or barrel shape can be
malle by using a check plug tfull-form or truncated) hal'ing a
maximum length or three pitches. rotating the plug through the full
length of the segments. and noting the plus and minus(:':) indicator
v~riarion at specific points in rhe segments.
A8.1.2 Flanl< Angle Wear
(a) Indicated differences exceeding X tolerance for
pitch diameter values obtained by A8.1.1 procedure (a)
and (c), or (b) and (d), reveal that the segments have
excessive Oank angle wear; or
(h) Indicated differences exceeding X tolerance for
pitch diameter values obtained between the full-form
portion and the truncated portion of the setting plug
when engaging the segments over their full length also
reveal that the segments have excessive nank angle
wear.
NOTE: Inspection fixtures can be used for the above.
A8.1.6 Minor Cylinder Size Compared to
Pitch Cylinder Diameter Size and Minor Diameter Straightness (As a Coded Pair)
(a) Using the full-form portion of theW tolerancesetting plug, engage its entire length into the segments
and zero-out the indicator.
(h) Using a plain cylindrical plug having a size equal
to the maximum-material minor diameter of the thread
size in question, engage that plug fully into the segments and note the reading.
The difference in reading must be within the X
tolerance specified for minor diameter.
(c) To verify the taper of the minor diameter, partially engage the plain cylindrical plug from each end of
the segments.
(d) Measure directly for straightness from the segment mounting hole directly to the minor diameter
Oats of each thread in the segment.
A8.1.3 lead Error. Should the preceding checks
for straightness and flank angle wear fall within X
tolerance, the check for lead error is performed as
follows.
(a) Using the last three threads of the .fidl~f'orm
portion of the setting plug (handle end on taperlock
blanks), engage the.fir.lt three threads on one end of the
segments. Note the reading.
(h) With the three thread engagement above, rotate
the.full~(orm portion of the plug through the segments
to f~JIIength engagement. Note the reading.
An indicated difference exceeding X tolerance for
pitcl~ diameter between the first and second readings
above reveals that the segments have excessive lead
error.
(c) Repeat steps (a) and (b) with the truncated portion of the plug. Note the reading.
An indicated difference exceeding X tolerance for
pitch diameter between the first and second readings
reveals that the segments have a lead error.
AB.1. 7 Minor Cylinder to Pitch Cylinder Coaxiality Relationship (As a Coded Pair)
!'IOTE: Even though the size oft he minor diameters may be within
tolerances. they may no! be coaxial.
(a) Using the full-form portion of theW tolerancesetting plug, engage the entire length into the segments
and z.ero-out the indicator at the high point. Lock the
segments on the studs, with the set screws provided in
the backs of the segments to prevent them from pivoting. Lift the pivot arm and back out the plug.
!\IOTE: The pivot arm will not lift high enough to allow total disengagement. Consequently, the plug must be screwed out.
A8.1.4 Thread Form and Cylindrical Form
Continuity. For checking continuity of threaded
and plain surfaces (helical profile uniformity, continuous thread flank contact with setting plug, and
cylindrical contacts), the conventional bluing procedure is used.
(h) Using the plain cylindrical plug having a size
equal to the maximum-material minor diameter of the
thread size in question, engage the plug by sliding it in
(right to left or left to right) from the end. Note the
reading.
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diameter difference corresponds with the working
range oft he indicator dial, are required. When they are
applied to the cluster of rolls or segments, the difference in indicator dial readings should not vary by
more than ± I least graduation from the calibrated
difference between the two gages.
(c) The indicated difference between steps (a) and
(b) above should not exceed X tolerance for minor
diameter.
(d) Loosen and reverse the top segment 180 deg.
(ledge side out) and using the full-form portion of the
W tolerance-setting plug, engage the entire length into
the segments and zero-out the indicator at the high
point. With the bottom segment still locked as in step
(a), lock the top segment on the stud with the set screw
provided in the back of the segment to prevent it from
pivoting. Lift the pivot arm and back out the plug.
A 11 CALIBRATION OF DIAL AND
ELECTRONIC INDICATORS
NOTE; The pivot arm will not lift high enough to allow total <.lisengagement. Consequently. the plug must be screwc<.l out.
Calibration of the indicator may be done by displacing the spindle with a calibrated micrometer screw or
with tolerance Grade 3 gage blocks inserted between a
fixed anvil and the spindle. The accuracy of the micrometer screw should be 0.0007 mm and is used for
calibrating indicators with resolution of 0.002 mm and
larger. The zero setting for calibrating dial indicators is
at the 12 o'clock position. A minimum of four equally
spaced increments per revolution is calibrated. On
electronic indicators each numbered division is
calibrated.
(e) Repeat step (b) above.
(j) The indicated difference between steps (d) and
(e) above should not exceed X tolerance for minor
diameter.
A9 INSPECTION OF THREADED CONTACT
SEGMENTS USED ON INTERNAL
PRODUCT THREAD
The coded pairs of segments are locked or clamped
when engaging the plain ring gage or thread-setting
ring. Then thread form, pitch diameter, major diameter, pitch, and straightness can be inspected by
methods described in A2.1 through A2.8.
A12 ASSESSMENT OF SURFACE QUALITY
Product threads which exhibit torn or rough surface
may be assessed with indicating gages. The rapid fluctuation of the indicating needle when the part is rotated
slowly between the gage contacts may not exceed
0.0025 mm. For external threads, a roll type indicating
gage with "best size" thread radius rolls is used.
For internal threads, a gage with "best size" thread
ball contacts is used.
A 1 0 CHECK FOR MAGNIFICATION
DISCREPANCIES DUE TO INDICATING
SYSTEM LINKAGE
Two X tolerance plain plug gages for the external
thread indicating gages and two X tolerance plain ring
gages for the internal thread indicator gages, whose
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APPENDIX B
METROLOGY OF 60 deg. SCREW THREADS
(This Appendix is not part of ANSI/ ASME B 1.16M-1984, and is included for information purposes only.)
81 WIRE METHOD OF MEASUREMENT OF
PITCH DIAMETER (THREAD GROOVE
DIAMETER)
The "best size" thread wire is taken as that size which
will touch at the groove diameter of a groove cut
around a cylinder perpendicular to the axis of the
cylinder. The size of the "best size" thread wire, resting
in a zero lead angle 60 deg. vee thread, is given by the
formula:
This Section presents specifications and techniques
for the measurement of screw thread plug gages and
setting plugs by measuring over accurate cylinders or
wires inserted in the thread grooves. The purpose is to
make available a standard United States method for
making such measurements. The practices described
measure groove diameter, which is equal to pitch
diameter only on a thread with perfect pitch spacing.
u· = 0.5p X sec a
{I)
where
w = diameter of wire
p =pitch
a = half-angle of thread
B2 SIZE OF WIRES
Reduce this formula to
In the three-wire method of measuring pitch diameter. hardened steel cylinders or wires of appropriate
size are placed in the thread groove. two on one side of
the screw and one on the opposite side, as shown in Fig.
B I. The contact face of the comparator. measuring
machine, or micrometer anvil or spindle which is over
the two wires must be sufficiently large in diameter or
width to touch both wires; that is, it must be greater
than the pitch of the thread. It is best to select wires of
such a size that they touch the sides of the thread at
points where the groove is equal to 0.5p {groove diameter). This is done so that the measurement of pitch
diameter is least affected by any error in thread angle.
The size of wire which touches exactly at the groove
diameter of a perfect thread of a given pitch is termed
the "best size" thread wire for that pitch.
The depth at which a wire of given diameter will rest
in a thread groove depends primarily on the pitch and
included angle of the thread; and, secondarily, on the
an'gle made by the helix at the point of contact of the
wi're and the thread, with a plane perpendicular to the
axis oft he screw. Variation in the lead angle has a very
small effect in the measurement of groove diameter
with wires. It is desirable to use one size of wire to
m9asure all threads of a given pitch and included angle.
II'= 0.57735 X p
for 60 deg. threads.
On occasion, it may be necessary when a "best size"
thread wire is not available to measure pitch diameter
by means of wires of other than the "best size." The
minimum size which may be used is limited to that
permitting the wire to project above the crest of the
thread, and the maximum, to that permitting the wire
to rest on the flanks of the thread just below the crest
and not ride on the crest of the thread. The diameters of
the best size, maximum, and minimum wires for 60
deg. threads are given in Table Bl.
83 METHODS OF MEASURING WIRES
CONSIDERING THE EFFECT
OF DEFORMATION
Measurement of the pitch diameter of a thread gage
by means of the three-wire method is most conveniently
made when sufficient force is applied to the wires by
the measuring instrument to properly align the wires
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d
FIG. B1
A THREE-WIRE METHOD OF MEASURING PITCH (THREAD GROOVE) DIAMETER
OF THREAD PLUG GAGES
with the axes of cylinder and wire at 90 deg. to each
other if an appropriate selection of cylinder diameter
and the measuring force is made. Optimum compensation for the deformations which occur in the measurement of pitch diameter would require the calibration of
wires with a different cylinder or force for every thread
diameter-pitch combination. Calibration of wires involving such a variety of conditions is neither practical
nor necessary, as the measurement procedure which is
generally followed will assure uniformity of values. It is
desirable to keep the effects of deformation small.
(h) It can be shown, for example, that all sizes of
threads from 3.5 mm to 50 mm can be measured with
wires calibrated against a 20 mm diameter cylinder
using the forc~s recommended for pitch diameter measurements in Table B2 with variations from true pitch
diameter (neglecting the effect of lead angle) not in excess of 0.0009 mm. Slightly larger discrepancies in the
50 mm to 100 mm size range are relatively unimportant
because these sizes have larger tolerances. For sizes
smaller than 3.5 mm it is necessary to calibrate wires
and gage. Since a wire touches a minute area on each
thread flank, the deformation of the wire and thread
will be sufficiently large to require some type of correction and the measuring force must be limited to
avoid permanent deformation of the wire and gage. As
an indication of the need for compensation for the
deformations, it can be shown that the total effect on
pitch diameter of the deformations of three wires and an
M 12 X 1.25 thread gage is 0.005 mm when measured
under I I .I N. It is practical to compensate for the
major portion of this deformation by a simple procedure described in ·the following paragraphs.
(a) It would be possible to prepare tables of the
deformation of all standardized sizes of gages, but this
would not take care of special combinations of pitch
and diameter. Another method of compensating for
the deformations is to measure the thread wires under
conditions which provide deformations equivalent to
those which occur when the wires are used to measure a
thread. This can be accomplished by the measurement
of the thread wires between a flat anvil and a cylinder
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TABU: 1!11
MflRIC THREAD-MEASURING WIRES FOR 60 deg.
SCREW THREADS
Wire Sizes, W
Pitch
Best 1
0.577350p
Minimum 2
0.505182p
Ma"imum
1.010363p
C , "Best Size" Thread
3
Wire Constant,
0.866025p
nun
mm
mm
mm
mm
0.2
0.25
0.3
0.35
0.1155
0.1443
0.1732
0.202'1
0.1010
0.1263
0.1516
0.1768
0.2021
0.2526
0.3031
0.3536
0.1732
0.2165
0.2598
0.3031
0.4
0.45
0.5
0.6
0.2309
0.2598
0.2887
0.3464
0.2021
0.2273
0.2526
0.3031
0.4041
0.4547
0.5052
0.6062
0.3464
0.3897
0.4330
0.5196
0.7
0.75
0.8
0.4041
0.4330
0.4619
0.5774
0.3536
0.3789
0.4041
0.5052
0.7073
0.7578
0.8083
1.0104
0.6062
0.6495
0.6928
0.8660
1.25
1.5
'1.75
2
0.7217
0,8660
1.0104
1.1547
0.6315
0.7578
0.8841
1.0104
1.2630
1.5155
1.7681
2.0208
1.0825
1.2990
1.5155
1.7321
2.5
3
3.5
4
1.4434
1.7321
2.0207
2.3094
1.2630
1.5155
1.7681
2.0207
2.5259
3.0311
3.5363
4.0415
2.1651
2.5981
3.0311
3.4641
4.5
5
5.5
6
2.5981
2.8868
3.1754
3.4641
2.2733
2.5259
2.7785
3.0311
4.5466
5.0518
5.5570
6.0622
3.8971
4.3301
4.7631
5.1962
2
1--JOTES:
(1) The diameters of "best size" thread balls are the same as the diameters of the "best site" thread
wires.
(2) Measured PO= Mw + 0.8G6025p- 3W
(3) If "best size" thread wire is used, PD = Mw- C.
TADU 02 MEASURING FORCE FOR OVB:R-WIRE
MEASUREMENTS OF EXTERNAL PITCH DIAMETER AND
WIRE CALIBRATION, AND CYLINDRICAL
DIAMETER FOR WIRE CALIBRATION
------------·--------------------lb (Ref.)
Cylinder
Diameter,
mm
0.25
0.50
1.00
2.50
1.25
3
20
20
Measuring Force (±10%)
Pitch Range, mm
0.2-0.35
0.35-0.6
0.6-1.25
1.25 and larger
1.1
2.2
4.5
11.1
NOTE:
(1) 1N = 0.2248 lbf
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The use of other contact forces will cause a difference
in the reading over the wires, and to completely
compensate for such errors is impractical. Variations
in diameter around the wire should be determined by
rotating the wire between a spherical or flat measuring
contact and an anvil hal'ing the form of a 60 deg. vee
grool'e. Variations in diameter along the wire should
be determined by measuring between a spherical or flat
contact and a cylindrical am·il.
(d) The wires should be free to assume their positions
in the thread grooves without restraint. (The practice of
holding wires in position with elastic bands can introduce errors in measurement.)
(e) To assure accurate values for pitch diameter measurement, the measured value should be given to three
decimal places.
(j) Measurements shall be standard at 20°C.
against a 3 mm cylinder which has a radius more nearly
equal to the radius of curvature of the thread flank.
{c) As previously noted, the force applied by the
measuring device must be limited to avoid permanent
deformation of ihe wires or gage, or both. Even for
large diameter threads having coarse pitches, the
maximum compressi1·e stress at the points where a wire
touches the thread flanks is high. and it increases to a
point where permanent deformation may occur for the
small diameter threads. It therefore becomes necessary
to reduce the measu·ring force progressively as the sizes
of threads decrease. Sec Table 82.
84 METHODS OF MEASUREMENT
USING WIRES
The computed l'alue for the pitch diameter of a
screw thread gage obtained from readings over wires
will depend upon the accuracy of the measuring instrument used, the measuring force, and the value of
the diameter of the wires used in the computations. In
order to measure the pitch diameter of a screw thread
gage to an accuracy of0.0025 mm. strict adherence to
the methods specified is required.
(a) The "best size" thread wires shall comply with
the specifications listed in B2. The diameter of the
wires must be known to within 0.0005 mm.
{h) The measurement over wires should be made
with a measuring instrument which reads directly to
0.00025 mm and has flat parallel contacts within
0.0001 mm.
(c) A wire presses on the flanks of a 60 deg. thread
with the force that is applied to the wire by the measuring instrument. Inasmuch as the wire and thread
deform at the contact areas. it is desirable to determine the size of the wire under conditions which will
compensate for this deformation. It is recommended
for standard practice that diameters of wires be measured between a flat contact and a hardened and accurately ground and lapped steel cylinder having a
diameter in accordance with Table B I with the measuring force specified in Table 82. The plane of the flat
contact should be parallel to the contact element of the
cylinder within 0.000 I mm.
To avoid a permanent deformation of the material
of the wire or gages, it is necessary to limit the contact
force and, for consistent results, a uniform practice as
to contact force in making wire measurements of
hardened screw threads gages is necessary. The recommended force for external pitch diameter measurements is given in Table B2.
B5 STANDARD SPECIFICATION FOR
WIRES AND STANDARD PRACTICE
IN MEASUREMENT OF WIRES
OF 60 deg. THREADS
The following specifications represent present practice relative to thread-measuring wires.
(a) Composition. The wire~ shall be accurately
finished steel cylinders. the hardness of which shall not
be less than that corresponding to a Knoop indentation
number of 776 minimum. The surface texture shall not
exceed the equivalent of 0.05 11m Ru max.
(h) Length of Wires. The working surface shall be
at least 25 mm in length. The wire may be prol'ided
with a suitable means of suspension.
(c) Diameter o.f Wires. One set of wires shall consist
of three wires which shall hal'e the same diameter
within 0.00025 mm, and this common diameter shall be
within 0.0005 mm of that corresponding to the "best
size" for the pitch for which the wires are to be used.
Wires shall be measured between a flat contact and a
hardened and accurately finished cylinder having a
surface texture not oYer 0.05 11m R, max. The measuring forces and cylinder diameter shall be per
Table B2.
(d) J'ariation in Diameter. Variations in diameter
along a wire {taper) ol'er the 25 mm interval at the
center of its length shall not exceed 0.00025 mm as
determined by measuring between a spherical or flat
contact and a cylindrical contact.
Variations from true cylindrical contour of a wire
(out-of-roundness. or noncircular cross section) over
its 25 mm central interval shall not exceed 0.00025 mm
as determined by measuring between a spherical or flat
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measuring contact and a well-finished 60 deg. vee
groove.
(e) Container and Marking. A suitable container
shall be provided for each set of wires. The pitch for
which the wires are the "best size" and the diameter of
the 25 mm central interval of the wires, as determined
by measurements under standard conditions as specified, shall be marked on the container. The measuring
force and C corrections shall be marked in the
container.
u) (p) - W (I + cosec a
d2 = M w + ( -cot -
2
+ tan A c~ u cot a )
1
(5)
B7 SIMPLIFIED FORMULA FOR
PITCH DIAMETER
86 GENERAL FORMULA FOR
MEASUREMENT OF PITCH
In the measurement of pitch diameter, the term
DIAMETER
( w tan A' ~os
2
The general formula for determining the pitch
diameter of any thread whose sides are symmetrical
with respect to a line drawn through the vertex and
perpendicular to the axis of the thread in which the
slight effect of lead angle is taken into account is:
acot a)
is neglected, as its value is small, being in all cases less
than 0.0038 mm for standard single lead fastening
screws of M2 and larger when the "best size" thread
wire is used. Formula (5) takes the simplified form:
d1 = M,.. +(co~ a )(p)- w[l + (coscc 2 u
a) (p)- W( + cosec a)
cot
d2 = Mw + ( - 2
I
(6)
+ cot 1 ll' tan 2 A') 1/ 2]
Mw = measurement over wires
The practice of using formula (6) for such threads is
permissible in order to maintain uniformity of practice
in the United States and thus avoid confusion.
For a 60 deg. thread of correct angle and thread
form, formula (6) simplifies to
a
half-angle of thread
p =pitch
d2 = M .. + 0.866025p- 3 W
where
d2 = pitch diameter
=
tan A'=
(7)
lead
d = lead angle (angle between axis
3.1416 2 o f wire
. an d p 1ane per pen d.JCU 1ar
For a given set of "best size" thread wires
to axis of thread)
W = mean diameter of wires
where
This formula is a very close apporoximation, being
based on certain assumptions regarding the positions
of the points of contact between the wire and the
thread.
Formula (3) can be converted to the following
simplified form, which is particularly useful when
measuring threads of large lead angle:
d2 = M. +(co~ a )(p)- W(J +cosec u')
C-= W
[I +cosec a- (co~ u )(p)]
The quantity Cis a constant for a given thread angle
and, when the wires are used for measuring threads of
the pitch and angle for which they are the "best size,"
the pitch diameter is obtained by the simple operation
of subtracting this constant from the measurement
taken over the wires. In fact, when "best size" thread
wires are used, this constant is changed very little by a
moderate variation or error in the angle of the thread.
Consequently, the constants for the various sets of
wires in use may be tabulated, thus saving a considerable amount of time in the inspection of gages.
(4)
in which 01' = the angle whose tangent equals tan a
cos 'A'.
When formula (3) is used, the usual practice is to
expand the square root term as a series, retaining only
the first and second terms, which gives the following:
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However, when wires of other than the best size are
used, this constant changes appreciably with a variation in the angle of the thread.
With the exception of large pitch screws, it has been
shown that variation in angle from the basic size causes
no appreciable change in the quantity C for the "best
size" thread wires. (For angle variation of 2 deg., C
increases by 0.00 I mm for a pitch of 1.5 mm and 0.002
mm for a pitch of 3 mm.) On the other hand, when a
wire near the maximum or minimum allowable size is
used, a considerable change occurs, and the values of
the cotangent and the cosecant of the actual measured
half-angle are to be used. It is apparent, therefore. that
there is a great advantage in using wires very closely
approximating the "best size." For convenience in car-·
rying out computations, the value C for pitches as
shown in Table B I should be used.
TABLE 83 MEASURING FORCE OVER
BALLS FOR INTERNAL PITCH
DIAMETER MEASUREMENT
AND BALL CALIBRATION
Measuring Force (±10%)
Pitch
Range, mm
N
lb (Ref.)
0.8-1.25
1.25-3
3 and larger
1.1
1.7
2.2
0.250
0.375
0.500
size" thread ball for the specified pitch. The sphericity
should not exceed 0.00025 mm.
89.2 Method of Measuring Thread Balls
The following procedures shall be used when measuring pitch diameter thread balls.
(a) In order to measure the pitch diameter of a 60
deg. thread ring gage to an accuracy of within 0.0025
mm by means of thread balls, it is necessary to know
the thread ball diameters to within 0.0005 mm. Thus, it
is necessary to use a measuring instrument that reads
accurately to 0.0003 mm ..
(h) The thread ball presses on the flanks of a 60 de g.
thread with the force that is applied to the thread ball
by the measuring instrument. Since the thread ball and
thread deform at the contact areas, the size of the
thread ball should be determined under Gonditions
which nearly compensate for this deformation. The
thread ball should be measured between parallel, flat,
hardened steel contacts which are set with calibrated
gage blocks. The contact should be parallel within
0.0001 mm.
(c) To avoid exceeding the elastic limit of the thread
balls and thread gages and to prevent excessive deformation compensation. it is necessary to recommend
a uniform practice for measuring force for the calibration of thread balls and for their use in measuring
internal pitch diameter. Table B3 gives the recommended measuring forces.
(d) Variations in diameter around the thread ball
should be determined by rotating the thread ball
between parallel measuring contacts.
BS SETIING MEASURING INSTRUMENTS
WITH VARIABLE MEASURING FORCE
·:Recommended practice for setting measuring instruments using gage blocks is as follows.
(a) Wipe anvils and gage blocks free from dirt and
dust.
(h) Wring the gage blocks to both anvils at maxmum measuring force setting. or press with fingers the
tailstock spindle against the gage blocks while wringing
them to the anvils.
(c) With the gage blocks still in the instrument,
reduce the measuring force to that which will be used
and reset the instrument at this working measuring
force. This procedure provides adequate force for
wringing gage blocks in with relatively large areas of
anvil faces. The final setting at the working measuring
force to be used compensates for any instrument
deflection variation that may occur at the higher
measuring forces.
89 THREAD BALlS
B9.1 "Best Size" Thread Balls Specifications
Thread balls shall meet the following requirements:
(a} for a 60 dcg. thread, the "best size" thread ball
sizes are identical to the "best size" thread wire sizes
and arc given in Table Bl;
(h) one set of "best size" thread balls consists of
three hardened steel balls that have the same diameter
within 0.00025 mm, and their common diameter
should be within 0.0005 mm of the corresponding "best
810 INTERNAL PITCH DIAMETER
MEASUREMENT
Indicating gages with "best size" thread ball contacts
are set to either a calibrated plain ring gage or a gage
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block gap which is larger than the basic pitch diameter
of the product thread by one-half of the diameter of the
"best size" thread balL The measured internal pitch
diameter is obtained by adding the indicator reading
change directly to the basic pitch diameter size. Setting
to a plain ring gage permits Jess uncertainty in deformation compensation. The recommended measuring force
over thread balls for internal pitch diameter measurement is given in Table B3.
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APPENDIX C
METRIC TABLES FOR GAGE LENGTHS
(This Appendix is not part of ANSI/ASME B 1.16M-1984, and is included for information purposes only.)
IAIIU.E C1
LENGTHS OF TAPERLOCK AND TRILOCK THREAD PLUG GAGE BLANKS {SI) .$ELECTED
FROM ANSI/ASME 047.1aM
Thread Sizes
Thread Lengths
Fine Pitch
Instrument Thread
Plug Gages
:
:
Range
Thread Plug Gages
_;------- ,--·-··-···-- - - · · - - - - - - - -
To and
Including
Above
-·
:
-·-
1
--·--. - .. --------
2
~--------
---------
mm
mm
·--··
1.50
2.67
3.01
I
5.84
HI
GO
HI
3
4
5
6
mm
mm
mm
mm
6.4
7.9
10.3
12.7
19.0
22.2
25.4
4.8
5.6
7.1
7.9
9.5
12.7
15.9
4.8
5.6
7.1
7.9
9.5
12.7
15.9
3.2
4.0
5.6
6.4
7.9
9.5
11.1
19.0
19.0
12.7
22.2
22.2
25.4
25.4
25.4
25.4
19.0
'19.0
15.9
15.9
·-·
2.67
3.81
5.84
9.27
12.95
20.96
28.83
9.27
12.95
20.96
GO
..
28.83
Pitches 2.0 and
smaller
Pitches larger
than 2.0
25.4
31.8
38.35
- - --·-··
38.35
51 .05
63.75
76 .45
89."15
203 .45
51.05
63.75
76.45
89.15
203.45
305.05
Pilches
3.5 and
larger
Pitches
between
3.5 and 1.5
Pitches
1.5 and
smaller
47.6
50.0
50.8
50.0
54.0
57.2
31.8
34.9
38.1
30.1
38.1
38.1
22.2
22.2
25.4
25.4
25.4
25.4
. L.
...
. '.
...
. .
'
. ..
. ..
...
...
GENERAl NOTE:
For trilock plug blanks above 19.3 mm and including 30.35 mm, and wire type plug blanks in sizes below 25.65 mm, see ANSI/ASME ll47.1aM.
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1 ABU C2 LENGTHS Of HIREAO RING GAGE BLANKS AND TOTAl THREAD LENGTHS OF
STANDARD TRUNCATED SETTING PLUG GAGE BLANKS (SI) SELECTED FROM ANSI/ASME B47.1aM
- - - - - - - - - - - - - - - - -·-·--
~----------
Thread Sizes
~----···-
-··-·---·-----~-
Total Thread Lengths ol Truncated
Thread-Setting Plugs
lengths ol Jhread Ring Gage s
------
Including
Thin Ring
Thick Ring
Fin e Pitch
lnst rument
Ring
2
3
4
5
6
7
mrn
mm
rnm
mm
mm
mm
1.50
2.29
3.81
5.84
9.27
2.29
3.81
5.8•1
9.27
12.95
2.4
4.0
4.8
8.7
11.1
12.95
20.96
28.83
38.35
51.05
20.96
28.63
38.35
51.05
63.75
14.3
17.5
19.0
20.6
22.2
19.0
23.8
28.6
31.8
33.3
63,75
76.45
89.15
101.85
76.45
89.15
101.85
159.00
22.2
23.6
23.8
34.9
36.5
38.1
38.1
1-t:'11'
. .J>lr.
Above
:ie 'f~'and
For Thin Ring
For Thick Ring
For Fine Pitch
Instrument
Ring
"'
-----·-·---
_ _2_5·~___1
----. ..
6.4
7.9
5.6
9.5
10.3
19.0
25.4
11.9
13.5
15.9
15.9
17.5
'
..
. ..
...
.
'.
...
...
...
...
. ..
...
8
··-----
mm
. ..
. ..
'
..
...
14.3
17.5
31.8
38.1
41.3
47.6
50.8
47.6
54.0
60.3
73.0
76.2
25.4
28.6
33.3
33.3
36.5
50.8
50.8
54.0
54.0
79.4
79.4
82.6
82.6
. ..
. ..
. ..
. ..
..-~·------·---·---·-
GENE.RI\L NOTES:
(a) Thin gagt> blanks are used for all lO thread ring gages, recessing sides as applicable.
(b) for GO thread ring gages:
(1) 0.0 rnm to 5.84 mm, use thin blanks for all pitches, recessing sides as applicable;
(2) above 5.64 mm to 12.95 mm, use thin blanks for pitches 0.75 mm and larger; fine pitch instrument blanks for pitches finer than
0.7~ mm;
·
(3) above 12.95 rnm to 28.83 mrn, use thick blanks for pitches larger than 2 rnm, thin blanks for pitches 1 rnrn to 2 mrn, and fine pitch
instrument blanks for pitches finer th.Jn 1 mm;
(4} above 28.83 mm to 152.65 mm, use thick blanks for pitches larger than 2.5 rnm, thin blanks for pitches 1 rnrn to 2 mrn, and fine pitch
instrument blanb for pitches finer than 1 mm;
(5) above 152.65 mm, use thick blanks for all pitches.
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APPENDIX D
CUSTOMARY EQUIVALENTS
(This Appendix is not part of ANSI/ASME B 16.1 M-1984, and is included for information purposes only.)
This Appendix presents the customary equivalents of the metric tables in this
Standard, as follows. Data appearing here are for reference only.
Metric Table
6
7
8
10
II
12
13
Bl
Cl
C2
Description
X Gage Tolerance
W Gage Tolerance
Cylindrical Gage Tolerance
Gages for Standard Thread Series
6g and 6H
Setting Gages for Standard Thread
Series 6g and 6H
Gages for Standard Thread Series
4g6g and 6H
Setting Gages for Standard Thread
Series 4g6g and 6H
Thread-Measuring Wires
Lengths of Plug Gage Blanks
Lengths of Ring Gage and Set Plug
Blanks
Inch Table
Dl
02
03
D5
06
07
08
04
09
DIO
127
Copyright ASME fnternal!onal
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No mproducl!on or networking pormilled wllhout license frorn IHS
Order Number: 01986654
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·
TABU Dl
X GAGE TOLERANCES FOR THREAD GAGES
Tolerance on Pitch Diameter
(Notes 2, 4)
Tolerance on Major or
Minor [)iameters (Note 4)
mrn
Tolerance
on lead,
in.
(Noles 1, 3)
Tolerance on
1-talf-Angle
of Thread,
deg. ±min.
To and
lnduding
100 mm
Above
100 mm
To and
Including
39 mm
Above
39 mm to
100 mm
Above
100 mm
to 200 mm
Above
200 mm
to 300 mm
1
2
3
4
5
6
7
8
9
0.00020
.00020
.00020
.00020
0 40
0 40
0 30
0 30
0.00031
.00031
.00031
.00031
...
...
...
.. .
0.00020
. 00020
.00020
.00020
. ..
...
.. .
...
...
...
. ..
. ..
0.4
0.45
0.5
0.55
.00020
.00020
.00020
.00020
0 30
0 30
0 30
0 30
.00039
.00039
.00039
.00039
...
...
0.6
0.65
0.7
0.75
.00020
.00020
.00020
.00020
0
0
0
0
20
20
20
20
0.8
1
1.25
1.5
.00031
.00031
.00031
.00031
0
0
0
0
1.75
2
2.5
3
3.5
Pitch,
0.2
0.25
0.3
0.35
:
. ..
...
...
...
. ..
. ..
. ..
..
.. .
.00020
.00020
.00020
.00020
0.00031
.00031
.00031
.00039
.00039.
.00039
.00039
...
...
...
...
.00020
.00020
.00020
.00020
.00031
.00031
.00031
.00031
...
...
15
15
15
10
.00051
.00051
.00051
.00051
0.00071
.00071
.00071
.00091
.00031
.00031
.00031
.00031
.00039
.00039
.00039
.00039
0.00051
.00051
.00051
.00059
0.00051
.00031
.00031
.00031
.00031
0 10
0 10
0 10
0 10
.00051
.00051
.00051
.00071
.00091
.00091
.00091
.00110
.00031
.00031
.00039
.00039
.00039
.00039
.00039
.00051
.00059
.00059
.00059
.00059
.00071
.00071
.00071
.00071
4.5
5
.00039
.00039
.00039
.00039
0 5
0 5
0 5
0 5
.00071
.00071
.00079
.00079
.00110
.00130
.00130
,00130
.00039
.00039
.00039
.00039
.00051
.00051
.00051
.00051
.00059
.00059
.00059
.00059
.00071
.00071
.00079
.00079
5.5
6
B
.00039
.00039
.00039
0
0
0
5
.00079
.00091
.00091
.00130
.00150
.00150
.00039
.00039
.00039
.00051
.00051
.00051
.00059
.00059
.00059
.00079
.00079
.00079
4
5
5
'
''.
...
...
...
...
.
''
.
..
. ..
. ..
. ..
. ..
. ..
.000~1
:·.('··/)!
.Cifl!i/1
----~---
GENERAL NOTE: Equivalent to metric table. Does not agree with ANSI 81.2.
NOTES:
(1) Allowable variation in lead between any two threads shall not be farther apart than the length of the standard gages that are
shown in ANSI/ASME B47.1aM.
(2) Above M300, the tolerance is directly proportional to the tolerance in col. 9, in the ratio of the diameter to 300 mm.
(3) See 5.13.9.
(4) Tolerances apply to designated size of thread. Apply tolerances in accordance with Table 4.
128
Copyright ASME lnt(nnational
Ordor Number: 01986654
Provfrled by IHS undor license with ASME
No reproduction or m•tworklng permilled wllhoulliconstl rrom IHS
Sold lo:[019H6654] NATIONAL MACHINE COMPANY (096226100001)- BYOUNG@NATIONALMA
Nat for Resale,2013-11-22 21:19:12 GMT
Z""OC"l
o
ao
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o· :c s:
~"'m
T AliRE 02
HI
--.··· .. ' .. ·.··
1
Tolerance on l.ead ' 3
~gg
W GAGE TO!..iERANCiES fOR THREAD GAGES
l!
[~
:;m
r
a
ZUl
~~
Qo
~~
~m
~~
~~
~:::!
,a
,z
_,.
:_j,l"""
~~
G>:t:
"'"
s:z
-<m
~
~
-<
~
~
!
~
c:
z
Gl
{§)
z
>
N
-D
I
Above
12 mm
To and
Including
12 mm
Above
12 mm
to 100 mm
Above
100 mm
To and
Including
12 mm
Above
12 mm
to 39 mm
39 mm to
2
3
4
5
6
7
8
0.2
0.25
0.3
0.35
0.00012
.00012
.00012
.00012
...
...
...
30
30
30
20
0.00031
.00031
.00031
.00031
. ..
...
. ..
. ..
0.00016
0
0
0
0
.00031
...
0.00012
.00012
.00012
.00012
.00016
0.4
0.45
0.5
0.55
.00012
.00012
.00012
.00012
.00016
.00016
.00016
.00016
0 20
0 20
0 20
0 18
.00031
.00031
.00031
.00031
.00031
.00039
.00039
.00039
...
...
...
.00012
.00012
.00012
.00012
.00016
.00016
.00016
.00016
0.6
0.65
0.7
0.75
.00012
.00012
.00012
.00012
.00016
.00016
.00016
.00016
0
0
0
0
18
15
15
12
.00031
.00031
.00031
.00031
.00039
.00039
.00039
.00039
...
...
...
...
.00012
.00012
.00012
.00012
0.8
1
1.25
1.5
.00012
..00016
.00016
.00016
.00016
.00016
.00016
.00016
0
0
0
0
12
a
a
a
.00031
.00051
.00051
.00051
.00051
.00051
.. 00051
.00051
0.00071
.00071
.00071
.00071
1.75
2
2.5
3
.00016
.00020
.00016
.00020
.00020
.00024
0
0
0
0
.00059
.00059
.00059
.00059
.00059
.00059
3.5
4 .
4.5
5
...
...
.00024
.00031
.00031
.00031
0 5
0 5
0 4
0 4
5.5
6
8
...
...
...
.00031
.00031
.00031
0
0
0
mm
1
~
:r
Ul
Tolerance on !'itch Diameiers •
Tolerance on
Half-Angle
of Thread,
deg. ±min.
To and
Including
12 mm
Pitch,
r
24
··ro!etance on Major or Minor Diame!ers 4
~~~
...
. '.
...
...
a
6
6
6
4
4
4
100 mm
Above
100 mm
to 200 mm
Above
200mm
to 300 mm
9
10
11
12
. ..
. ..
. ..
...
. ..
. ..
. ..
. '.
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
.00020
.00020
...
. ..
. '.
.. '
. ..
. ..
.00016
.0016
.00016
.00016
.00020
.00020
.00020
.00020
. ..
. .'
. ..
. ..
. ..
...
. ..
. ..
.00012
.00012
.00012
.00012
.00016
.00016
.00016
.00016
.00020
.00020
.00020
.00020
0.00024
.00024
.00024
.00024
0.00031
.00031
.00031
.00031
.00091
.00091
.00091
.00091
.00012
.00016
.00020
.00020
.00020
.00020
.00024
.00024
.C0024
.00024
.00031
.00031
,00031
~00031
.00039
.00039
.00039
.00039
.00071
.00071
.00079
.00079
.00110
.00110
.00130
.00130
...
. ..
.00020
.00020
.00020
.00020
.00024
.00024
.00024
.00024
.00031
.00031
.00031
.00031
.00039
.00039
.00039
.00039
.00079
.00091
.00091
.00130
.00130
.00150
. ..
.00020
.00020
.00020
.00024
.00024
.00024
.00031
.00031
.00031
.00039
.00039
.00039
...
. '.
...
...
...
. ..
...
. ..
...
...
. ..
'.'
. ..
. ..
. ..
. ..
. ..
...
gz
GENERAL NOTE: Equivalent to the metric table. Does not agree with ANSI 81.2.
"'
NOTES:
(1) Allowable variation in lead between any two threads shaH not be farther apart than the length of the standard gage that is shown in
ANSI/ASME B47.1aM.
{2) Above M300, the tolerance is directly proportional to the tolerance in col. 12, in the ratio of the diameter to 300 mm.
(3) See 5.13. 9.
(4) Toleranres apply to designated size of thread. >\pply tolerance in accordance with Table 5.
~
Above
. ..
TABLE 03
GAGE TOLERANCES FOR PLAIN CYLINDRICAL GAGES
Size Range
Tolerances, in. (Note 1)
Above
To and Including
XX
X
y
Z(Nole 2)
zz
1
2
3
4
5
6
7
mm
mm
in.
in.
in.
in.
in.
1
21
30
64
115
165
230
21
38
64
115
165
230
300
0.00002
.00003
.00004
.00005
.000065
.00008
.00010
0.00004
.00006
.00000
.00010
.00013
.00016
.00020
0.00007
.00009
.00012
.00015
.00019
.00024
.00030
0.00010
.00012
.00016
.00020
.00025
.00032
.00040
0.00020
.00024
.00032
.00040
.00050
.00064
.00080
NOTES:
{1) Tolerances apply to actual diameter of plug or ring. Apply tolerances in accordance with Table 4.
Symbols XX, X, Y, Z, and ZZ are standard gage tolerance classes.
{2) Used as tolerance on plain cylindrical plug and ring gages to check minor diameter for internal
threads and outside diameter for external threads. Also used for masters for setting indicati)lg
thread gages where design permits.
TABLE 04
MHRIC THREAD-MEASURING WIRES FOR 60 deg.
SCREW THREADS
Wire Sizes, W
(Note 1)
Minimum
(Nole2)
Pilch
0.577350p
0.505182p
1.010363p
C, "Best Sil:e" Thread
Wire Constant
(Note 3),
0.866025p
mm
in.
in.
in.
in.
0.2
0.25
0.3
0.35
0.4
0.45
0.00455
0.00568
0.00682
0.00796
0.00909
O.D1023
0.00398
0.00497
0.00597
0.00696
0.00796
0.00895
0.00796
0.00994
0.01193
0.01392
0.01591
0.01790
0.00662
0.00852
0.01023
0.01193
0.01364
0.01534
0.5
0.6
0.7
0.75
0.8
1
0.01137
0.01364
0.01591
0.01705
0.01616
0.02273
0.00994
0.01193
0.01392
0.01492
0.01591
0.01969
0.01989
0.02387
0.02784
0.02963
0.03162
0.03978
0.01705
0.02046
0.02387
0.02557
0.02726
0.03410
1.25
1.5
1.75
2
2.5
3
0.02841
0.03410
0.03978
0.04546
0.05683
0.06819
0.02406
0.02963
0.03461
0.03978
0.04972
0.05967
0.04972
0.05967
0.06961
0.07956
0.09945
0.11933
0.04262
0.05114
0.05967
0.06819
0.08524
0.10229
3.5
4
4.5
5
5.5
6
0.07956
0.09092
0.10229
0.11365
0.12502
0.13636
0.06961
0.07955
0.06950
0.09945
0.10939
0.11933
0.13922
0.15911
0.17900
0.19669
0.21678
0.23867
0.11933
0.13636
0.15343
0.17046
0.16753
0.20457
Best
Maximum
(Nole2)
NOTES:
{1) The diameters of "best size" thread balls are the same as the diameters of "best siz.e" thread wires.
(2) Measured PD"' Mw + 0.866025p- 3W.
{3) If "best size" thread wire is used, PO= Mw- C.
130
Copyright ASME lnlemalional
Provlc.led by IHS under Ucenso wllh ASME
l'>lo reproducllon or notworldng permUted wlthoulllcensa rrom IHS
Ordor Number: 01986654
Sold lo:[019B6664] NATIONAL MACHINE COMPANY (096226100001) • BYOUNG@NATIONALMA
Not for Rosa!o,2013·11-22 21:19:12 GMT
Z"'1JC1
o
ao
ill
cr ::c :s:
::::~wm
iH
~gg
GAG!ES :fOR STANDARD IHRIEAD SERIES ClASSES 6g AND 6H
M PROFILE SCREW THREADS__:__ liMiTS OlF SlZlE (CIUSTOMAIRY)
~a;~
TABU: 05
l!
[~
~m
Gages foy Externill Threads
~
Gages for internal Threads
"-
~
~
.a
X Thread Gages
X Thread Gages
Z Plain Gages lor
Major Diam.
3
:;:
LO
GO
"'
GO
Z Plain Gages for
Minor Diam.
HI
Nominal Size
and Pitch
Oass
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Pitch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT GO
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M1.6 X 0.35
6g
0.1)5331
0.05311
0.04732
0.04701
0.05083
0.05103
0.04807
0.04838
0.06224
0.06212
0.05890
0.05902
0.06299
0.06330
0.05406
0.05426
0.06016
0.05985
0.05740
0.05720
0.04807
0.04819
0.05201
0.05189
6H
M2 X 0.4
6g
0.06776
0.06756
0.06094
0.06055
0.06512
0.06532
0.06197
0.06236
0.07799
0.07787
0.07425
0.07437
0.07874
0.07913
0.06850
0.06870
0.07520
0.07481
0.07205
0.07185
0.06169
0.06181
0.06610
0.06598
6H
M25 X 0.45
6g
0.08614
0.08594
0.07846
0.07807
0.08335
0.08355
0.07980
0.08019
0.09764
0.09752
0.09370
0.09382
0.09843
0.09882
0.08693
0.08713
0.09421
0.09382
0.09067
0.09047
0.07925
0.07937
0.08417
0.08405
6H
M3 X 0.5
6g
0.10453
0.10433
0.09598
0.09559
0.10'i57
0.10177
0.09764
0.09803
0.11732
0.11720
0.11315
0.11327
0.11811
0.11850
(1,10531
0.10551
0.11319
0.11280
0.10925
0.10905
0.09681
0.09693
0.10232
0.10220
6H
M3.5 X 0.6
6g
0.12161
0.12141
0.11138
0.11099
0.11827
0.11807
0.11354
0.11393
0.13697
0.13685
0.13205
0.13217
0.13780
0.13819
0.12244
0.12264
0.13157
0.13118
0.12685
0.12665
0.11220
0.11232
0.11850
0.11838
6H
M4 X 0.7
6g
0.13870
0.13850
0.12677
0.12638
0.13516
0.13536
0.12965
0.13004
0.15661
0.15649
0.15110
0.15122
0.15748
0.15787
0.13957
0.13959
0.14972
0.14933
0.12764
0.12744
0.12764
0.12776
0.13472
0.13460
6H
s:
M5 xo.8
6g
0.17543
0.17512
0.16181
0.16130
0.17169
0.17200
0.16539
0.16590
0.19591
0.19579
0.19000
0.19012
0.19685
0.19736
0.17638
0.17669
0.18760
0.18709
0.18130
0.18099
0.16276
0.16288
0.17063
0.17051
6H
g
ill
M6X1
6g
0.20961
0.20930
0.19256
0.19205
0.20520
0.20551
0.19732
0.19681
0.23520
0.23508
0.22811
0.22823
0.23622
0.23673
0.21063
0.21094
0.22441
0.22390
0.21654
0.21623
0.19358
0.19370
0.20287
0.20275
6H
~
M8 X 1.25
6g
0.28189
0.28158
0.26059
0.26008
0.27724
0.27755
0.26740
0.26791
0.31386
0.31374
0.30551
0.30563
0.31496
0.31547
0.28299
0.28330
0.29913
0.29862
0.28929
0.28898
0.26169
0.26181
0.27213
0.27201
6H
M8X1
6g
0.28835
0.28804
0.27130
0.27079
0.28394
0.28425
0.27606
0.27657
0.31394
0.31382
0.30685
0.30697
0.31496
0.31547
0.28937
0.28968
0.30315
0.30264
0.29528
0.29497
0.27232
0.27220
0.28161
0.28173
6H
zwo
~~~
0
~
:;l:)'EJ
~~
f5-g;
~~
't'z
=t:~
-
UJ
~Q
"'~
:!~
~~
Gl:I:
"'"
s:z
-<m
"
0
~
~
~
c:
ii
@
~0
z
~
)>
- -
See Notes at end ol table.
----
ZuC)
o
o
a
ill
~~~
o:zs::
::~cnm
~~~
~;;$
~§ g
TABLE 05
:5~!!!.
Q~
GAGIE§ !fOR STANDARD THR!EAO SERIES ClASSES 6g AND 6H
M PROFH.E SCREW THREADS- UMITS OF SIZE (GJSTOMARY) (CONY'D)
~;
i[~
I
!m
~
Gages for External Threads
I
§
~
~
s:
X Thread Gages
GO
"'
Nominal Size
and Pitch
1
l'
Z Plain Gages ror
Major Diam.
Diam.
Minor
Diam.
GO
4
5
6
3
Diam.
2
I
X Thread Gages
LO
Minor
Diam.
Pitch
l Class
Gages for Internal Threads
Pitch
GO
Z Plain Gages for
Minor Diam.
HI
j
NOT GO
Major
Diam.
Diam.
Major
Diam.
Diam.
GO
NOT GO
Class
7
8
9
10
11
12
13
14
15
Pitch
Pitch
'
M10 X 1.5
6g
0.35409
0.35378
0.32850
0.32799
0.34890
0.34921
0.33709
0.33760
0.39244
0.39232
0.38315
0.38327
0.39370
0.39421
0.35535
0.35566
0.37425
0.37374
0.36244
0.36213
0.32976
0.32988
0.34157
0.34145
6H
M10 X 1.25
6g
0.36063
0.36032
0.33983
0.33932
0.35598
0.35629
0.34614
0.34665
0.39260
0.39248
0.38425
0.38437
0.39370
0.39421
0.36173
0.36204
0.37787
0.37736
0.36803
0.36772
0.34043
0.34055
0.35087
0.35075
6H
M10 X 0.75
6g
0.37366
0.37346
0.36087
0.36048
0.36972
0.36992
0.35382
0.36421
0.39283
0.39271
0.38732
0.38744
0.39370
0.39409
0.37453
0.37473
0.38563
0.38524
0.37972
0.37952
0.35173
0.36185
0.36921
0.36909
6H
M12 X 1.75
6g
0.42634
0.42603
0.39650
0.39599
0.42043
0.42074
0.40665
0.40716
0.47110
0.47098
0.46067
0.46079
0.47244
0.47295
0.42768
0.42799
0.44933
0.44882
0.43555
0.43524
0.39787
0.39799
0.41106
0.41094
6H
M12 X 1.5
6g
0.43283
0.43252
0.40724
0.40673
0.42732
0.42763
0.41551
0.41602
0.47118
0.47106
0.46189
0.46177
0.47244
0.47295
0.43409
0.43441
0.45339
0.45288
0.44157
0.44126
0.42980
0.42992
0.43909
0.43897
6H
:fs;
GJJ:
"'"
s:z
M12 X 1.25
6g
0.43937
0.43906
0.41807
0.41756
0.43417
0.43448
0.42433
0.42484
0.47134
0.47121
0.46299
0.46287
0.47244
0.47295
0.44047
0.44078
0.45740
0.45689
0.44756
0.44705
0.41917
0.41929
0.42951
0.42949
6H
8s:
M12 X1
(Note 1)
6g
0.44583
0.44552
0.42878
0.42827
0.44118
0.44149
0.43331
0.43382
0.47142
0.47130
0.46433
0.46421
0.47244
0.47295
0.44685
0.44716
0.46102
0.46051
0.45315
0.45284
0.42980
0.42992
0.43909
0.43897
6H
g
M14 X 2
6g
0.49854
0.49823
0.46445
0.46394
0.49224
0.49255
0.47650
0.47701
0.54969
0.54957
0.53866
0.53878
0.55118
0.55169
0.50004
0.50035
0.52413
0.52362
0.50839
0.50808
0.46594
0.46605
0.48071
0.48059
6H
M14 X 1.5
6g
0.51157
0.51126
0.48598
0.48547
0.50606
0.50637
0.49425
0.49476
0.54992
0.54980
0.54063
0.54075
0.55118
0.55169
0.51283
0.51314
0.53213
0.53162
0.52031
0.52000
0.48724
0.48736
0.49906
0.49894
6H
M15 X 1
5g
0.56394
0.56363
0.54689
0.54638
0.55929
0.55960
0.55142
0.55193
0.58952
0.58940
0.58244
0.58256
0.59055
0.59106
0.55496
0.56527
0.57913
0.57862
0.57126
0.57095
0.54791
0.54803
0.55720
0.55708
6H
zen
~~
::u-a
;::;
N
gal
~g
rg~
~'Z
:;:~
~0
.,z
~>
:.....•
-<m
~
~
~
~
c:
z
Gl
@
~
0
~
-
See Notes at end of table.
&~Q
~ l~
§~~
~s:~
~ tnm
~~~
0 Q::
lit
TABLE 05 GAGES fOR STANDARD THREAD S!ERIES ClASSES 6g AND 6H
M PROfli..IE SCREW THREADS- liMITS Of SIZE (CUSTOMARY) (CONT'D)
t5~!:!!..
"0~
!~
jg_;::
:J:.ITI
Gages for External Threads
[
8
Gages for Internal Threads
X Thread Gages
~
i5:
GO
rn
~~
Slo
::o-c;
Pitch
Diam.
Minor
Diam.
I' itch
Oiam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Pitch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT GO
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M16 X 2
6g
0.57728
0.57759
0.54319
0.54268
0.57098
0.57129
0.55236
0.55287
0.62843
0.62831
0.61740
0.61752
0.62992
0.63043
0.57878
0.57909
0.60287
0.60236
0.58713
0.58681
0.54469
0.54481
0.55945
0.55933
6H
M16 X 1.5
6g
0.59031
0.59000
0.56472
0.56421
0.58480
0.58511
0.57299
0.57350
0.62866
0.62854
0.61937
0.61949
0.62992
0.63043
0.59157
0.59188
0.61087
0.61036
0.59906
0.59875
0.56598
0.56610
0.57780
0.57768
6H
Mi7 X 1
6g
0.64268
0.64237
0.62563
0.62512
0.63803
0.63834
0.63016
0.63067
0.66827
0.66815
0.66118
0.66130
0.66929
0.66980
0.64370
0.64401
0.65787
0.65736
0.65000
0.64969
0.62665
0.62677
0.63594
0.63582
6H
M18 X 1.5
6g
0.66906
0.66875
0.64346
0.64295
0.66::.54
0.66385
0.65173
0.65224
0.70740
0.70728
0.69811
0.69823
0.70866
0.70917
&.67031
0.67062
0.68961
0.68910
0.67780
0.67749
0.64472
0.64484
0.65654
0.65642
6H
M20 X 2.5
6g
0.72181
0.72142
0.67917
0.67866
0.71512
0.71551
0.69543
0.69594
0.78575
0.78563
0.77256
0.77268
0.78740
0.78791
0.64472
0.64511
0.75197
0.75146
0.73228
0.73189
0.68087
0.68099
0.69858
0.69846
6H
M20 X 1.5
6g
0.74780
0.74749
0.72220
0.72169
0.74228
0.74259
0.73047
0.73098
0.78614
0.78602
0.77685
0.77697
0.78740
0.78791
0.74906
0.74937
0.76835
0.76784
0.75654
0.75623
0.72346
0.72358
0.73528
0.73516
6H
M20 X 1
6g
0.76079
0.76048
0.74374
0.74323
0.75614
0.75645
0.74827
0.74878
0.78638
0.78626
0.77929
0.77941
0.78740
0.78791
0.76181
0.76212
0.77598
0.77547
0.76811
0.76780
0.74476
0.74488
0.75406
0.75394
6H
M22 X 2.5
6g
0.80055
0.80016
0.75791
0.75740
0.79386
0.79425
0.77417
0.77468
0.86449
0.86637
0.85130
0.85142
0.86614
0.86665
0.80220
0.80259
0.83071
0.83020
0.81102
0.81063
0.75961
0.75973
0.77732
0.77720
6H
M22 X 1.5
6g
0.82654
0.82623
0.80094
0.80043
0.82102
0.82133
0.80921
0.80972
0.86488
0.86476
0.85559
0.85571
0.86614
0.86665
0.82780
0.82811
0.84709
0.84658
0.83528
0.83497
0.80220
0.80232
0.81402
0.81390
6H
M24 X 3
6g
0.86626
0.86587
0.81512
0.81441
0.85839
0.85878
0.83476
0.83547
0.94299
0.94287
0.92823
0.92835
0.94488
0.94559
0.86815
0.86854
0.90220
0.90149
0.87858
0.87819
0.81701
0.81713
0.83669
0.83657
6H
-·---
---
f..J.)
ft~
'fz
~~
NO
"'z
->
~·
-~~
N(")
G) ::I:
s:z
-<m
(")
0
;::
~
g
~
~
~c:
z
"'
@
~
5
~
~
Z Plain Gages for
Minor Diam.
HI
GO
Class
m~
~~
Z Plain Gages for
Major Diam.
lO
Nominal Si:ze
and Pilch
;:;;
Z(I)O
X Thread Gages
---
See Notes at end of table.
- - - -
--
z-on
~ ~~
""Sl
g-:5.
§_C..;!
a~l;
c·::r:~
::::1oom
~~~
~ ~~
~~~
TABU D5 GAGE§ !fOR STANDARD THRiEAD §ER!!ES CLASSES 6g AND 6H
M PifOFH.E SCRIEW THREADS- liMITS Of SIZE {CUSTOMARY) (CONT'D)
l!
g:~
~m
Gages for Eldemal Threads
"~
i
Gages for internal Threads
J( Thread Gages
X Thread Gages
~
:;:
GO
"'
zen
~~
Q 0
:;lJ-a
Nominal Size
and Pitch
l !'lain Gages for
Major Diam.
LO
Class
Pitch
Oiam.
Minor
Diarn.
Pitch
Diam.
1
2
3
4
M24 X 2
6g
0.89224
0.89193
M25 X 1.5
6g
M27 X3
I
GO
Minor
Diam.
GO
NOT GO
Major
Diam.
Fitch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT GO
Class
5
6
7
s
9
10
11
12
13
14
15
0.85815
0.85764
0.88555
0.88586
0.86980
0.87031
0.94339
0.94327
0.93236
0.93248
0.94488
0.94539
0.89374
0.89405
0.91831
0.91780
0.90256
0.90225
0.85965
0.85977
0.87441
0.87429
6H
0.94465
0.94434
0.91906
0.91855
0.93874
0.93905
0.92693
0.92744
0.98299
0.98287
0.97370
0.97382
0.98425
0.98476
0.94591
0.94622
0.96559
0.96508
0.95378
0.95347
0.92031
0.92043
0.93213
0.93201
6H
6g
0.98437
0.98398
0.93323
0.93252
0.97650
0.97689
0.95287
0.95358
1.06110
1.06098
1.04634
1.04646
1.06299
1.06370
0.98626
0.98665
1.02031
1.01960
0.99669
0.99630
0.93512
0.93524
0.95480
0.95468
6H
M27 X2
6g
1.01035
1.01004
0.97626
0.97575
1.00366
1.00397
0.98791
0.98842
1.06150
1.06138
1.05047
1.05059
1.06299
1.06350
1.01185
1.01216
1.03642
1.03591
1.02067
1.02036
0.97776
0.97788
0.99252
0.99240
6H
M30 X 3.5
6g
1.08953
1.08914
1.02984
1.02913
1.08118
1.08157
1.05362
1.05433
1.17902
1.17890
1.16228
1.16240
1.18110
1.18181
1.09161
1.09200
1.13020
1.12949
1.10264
1.10225
1.03193
1.03205
1.05398
1.05386
6H
M30 X 2
6g
1.12846
1.12815
1.09437
1.09386
1.12177
1.12208
1.10602
1.10653
1.17961
1.17949
1.16858
1.16870
1.18110
1.18161
1.12996
1.13027
1.15453
1.15402
1.13878
1.13847
1.09587
1.09599
1.11063
1.11051
6H
M30 X 1.5
6g
1.14150
1.14111
1.11591
1.11540
1.13559
1.13590
1.12378
1.12429
1.17984
1.17972
1.17055
1.17067
1.18110
1.18161
1.14276
1.14307
1.16244
1.16193
1.15063
1.15032
1.11717
1.11729
1.12898
1.12886
6H
M33X 2
6g
1.24657
1.24626
1.21248
1.21197
1.23988
1.24019
1.22413
1.22444
1.29772
1.29760
1.28669
1.28681
1.29921
1.29972
1.24807
1.24838
1.27264
1.27213
1.25689
1.25658
1.21398
1.21410
1.22874
1.22862
6H
M35 X 1.5
6g
1.33835
1.33804
1.31276
1.31225
1.33244
1.33275
1.32063
1.32114
1.37669
1.37657
1.36740
1.36752
1.37795
1.37846
1.33961
1.33992
1.35929
1.35878
1.34748
1.34717
1.31402
1.31414
1.32583
1.32571
6H
M36 X4
6g
1.31268
1.31229
1.24449
1.24378
1.30386
1.30425
1.27236
1.27307
1.41496
1.41484
1.39626
1.39638
1.41732
1.41803
1.31504
1.31543
1.35835
1.35764
1.32685
1.32646
1.24685
1.24697
1.27047
1.27035
;:;:;
.;:..
[~
~~
::!.::
~~
~::i
NO
.,z
~>
:..;,r-
~~
Z Plain Gages for
Minor Diam.
HI
"'"
s:z
G) :I:
-<m
"
0
s:
:g
~
g
Rl
ill
I
"'d
c:
z
Gl
(§)
~0
~
6H
-
See Notes at end of table.
z-un
Hl
§-cr;
g: i:~
:::~cnrn
~ [~
~~~
i~[
TABlE 05
~~
M PROFU.E SCIREW THiiUADS- liMiTS Of SWE (CUSTOMARY) (CONT'D)
~;
[~
GAGfS -!FOR STANDARD THIP.EAD SIHUES CLASSES 6g AND 6H
;
:;;m
Gages lor External Threads
l
I
X Thread Gages
i
~
co
0:
en
X Thread Cages
Z Plain Cages for
Major !Diam.
!..0
I
co
Z Plain (;;lOges for
MinorOiam.
HI
Class
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
co
NOT CO
Major
Diam.
Pitch
Diam.
Major
Oiam.
Pitch
Oiam.
GO
NOT CO
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M36X2
6g
1.36469
1.36438
1.33059
1.33008
1.35799
1.35830
1.34224
1.34275
1.41583
1.41571
1.40480
1.40492
1.41732
1.41783
1.36618
1.36649
1.39075
1.39024
1.37500
1.37469
1.33209
1.33221
1.34685
1.34673
6H
M39 X 2
6g
1.48280
1.48249
1.44870
1.44819
1.47610
1.47579
1.46035
1.46086
1.53394
1.53378
1.52291
1.52307
1.53543
1.53594
1.48429
1.48460
1.50886
1.50835
1.49311
1.49280
1.45020
1.45036
1.46496
1.46480
6H
M40 X 1.5
6g
1.53520
1.53481
1.50961
1.50910
1.52929
1.52968
1.51748
1.51799
1.57354
1.57338
1.56425
1.56441
1.57480
1.57531
1.53646
1.53685
1.55614
1.55563
1.54433
1.54394
1.51087
1.51103
1.52268
1.52252
6H
M42 X 4.5
Gg
1.53598
1.53547
1.45925
1.45846
1.52669
1.52720
1.49126
1.49205
1.65106
1.65090
1.63138
1.63154
1.65354
1.65433
'1.53846
1.53897
1.58630
1.58551
1.55087
1.55036
1.46177
1.46193
1.48815
1.48799
6H
~~
M42X2
6g
1.56681
1.56630
1.59421
1.59460
1.57846
1.57897
1.65205
1.65189
1.64102
1.64118
1.65354
1.65405
1.60240
1.60271
1.62697
1.62646
1.61122
1.61083
1.56831
1.56847
1.58307
1.58291
6H
~~
_,.
"'z
1.60091
1.60052
M45 X 1.5
6g
1.73205
1.73166
1.70646
1.70595
1.72614
1.72653
1.71433
1.71484
1.77039
1.77023
1.76110
1.76126
1.77165
1.77216
1.73331
1.73370
1.75299
1.75248
1.74118
1.74079
1.70772
1.70788
1.71953
1.71937
6H
n
M48X5
6g
1.67386
1.67307
1.74925
1.74976
1.70988
1.71067
1.88697
1.88681
1.86610
1.86626
1.88976
1.89055
1.761.89
1.76240
1.81445
1.81366
1.77508
1.77457
1.67665
1.67681
1.70461
1.70445
6H
~
1.75909
1.75858
M48X2
6g
1.83713
1.83674
1.80303
1.80252
1.83004
1.83043
1.81429
1.81480
1.88827
1.88811
1.87724
1.87740
1.88976
1.89027
1.83862
1.86366
1.86315
1.84791
1.84752
1.80453
1.80469
1.81929
1.81913
6H
1.83~01
6g
1.92890
1.92851
1.90331
1.90280
1.92260
1.92299
1.91079
1.91130
1.96724
1.96708
1.95795
1.95811
1.96650
1.96901
1.93016
1.93055
1.95031
1.94960
1.93650
1.93811
1.90457
1.90473
1.91636
1.91622
6H
6g
2.12574
2.12535
2.10016
2.09965
2.11945
2.11964
2.10764
2.10815
2.16409
2.16393
2.15460
2.15496
2.16535
2.16586
2.12701
2.12740
2.14717
2.14666
2.13535
2.13496
2.10142
210158
2.11323
2.11307
6H
zen,.,
g,Q..
g-S
-
Nomina! Size
and Pitch
Gages for Internal Threads
w
u.:
;o.:-:.
Qo
~-
m-m
"'.!,.Z
:..o.•
~;::
->
"'O
"'"
~~
~
i
j
~
c
z
"'
@
~0
~
M50 X 1.5
~~
See Notes at end of table.
~
Z"1H1
a~ ~~
~cg:
~~~
g"~ffi
~~~
~==~
i~[
TABU 05 GAG!ES fOR STANDARD THR!tAD SIER!IES ClASSES 6g AND 6H
M PIROfiU SCREW THR!EADS-liMITS Of SIZE (CUSTOMARY) (CONT'D)
~~
;:;>
""'
c.S:
,;m
i
Gages !or External Threads
r
Gages for lntemai Threads
X Thread Gages
X Thread Gages
a'
"s:
Z Plain Gages lor
Major Diam.
LO
GO
"'
I
GO
I
Class
Pilch
Diam.
Minor
Diam.
Pilch
Diam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Pilch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT GO
Class
2
3
4
5
b
7
8
9
10
11
12
13
14
15
M56 X 5.5
6g
2.06114
2.06063
1.96732
1.96653
2.05071
2.05122
2.00740
2.00819
2.20177
2.20161
2.17972
2.17986
2.20472
2.20551
2.06409
2.06460
2.12138
2.12059
2.07807
2.07756
1.97031
1.97047
1.99984
1.99966
6H
M56X 2
6g
2.15209
2.15170
2.11799
2.11748
2.14500
2.14539
2.12925
2.12976
2.20323
2.20307
2.19220
2.19236
2.20472
2.20523
2.15358
2.15397
2.17862
2.17811
2.16287
2.16248
2.11949
2.11965
2.13425
2.13409
6H
M60 X 1.5
6g
2.32260
2.32221
2.29701
2.29650
2.31630
2.31569
2.30449
2.30500
2.36094
2.36078
2.35165
2.35181
2.36220
2.36271
2.32386
2.32425
2.34402
2.34351
2.33220
2.33181
2.29827
2.29843
2.31008
2.30992
6H
M64 X 6
6g
2.36311
2.36260
2.26083
2.25992
2.35209
2.35260
2.30484
2.30575
2.51654
2.51638
2.49291
2.49307
2.51969
2.52060
2.36626
2.36677
2.42d27
2.42736
2.38102
2.38051
2.26398
2.26414
2.29547
2.29531
6H
M64X2
6g
2.46705
2.46666
2.43295
2.43244
2.45996
2.46035
2.44421
2.44472
2.51819
2.51803
2.50717
2.50733
2.51969
2.52020
2.46854
2.46893
2.49358
2.49307
2.47783
2.47744
2.43445
2.43461
2.44921
2.44905
6H
M65 X 1.5
6g
2.51945
2.51906
2.49386
2.49335
2.51315
2.51354
2.50134
2.50185
2.55780
2.55760
2.54850
2.54870
2.55906
2.52071
2.52110
2.54087
2.54036
2.52906
2.52867
2.49512
2.49492
2.50693
2.50713
6H
2.55957
Nominal Size
and Pilch
1
zen
~:
"'"a
G~
i~
~~
'<'z
z~
NO
~~
~~
N(1
l
""
O'o
Gl:l:
s:z
-tm
"
Z l'!ain Gages lor
Minor Diam.
HI
~
M70 X 1.5
6g
2.71630
2.71591
2.69071
2.69020
2.71000
2.71039
2.69819
2.69858
2.75465
2.75445
2.74535
2.74555
2.75591
2.75642
2.71756
2.71795
2.73772
2.73721
2.72591
2.72552
2.69197
2.69217
2.70378
2.70358
6H
I
M72 X6
6g
2.67807
2.67755
2.57579
2.57468
2.66705
2.66756
2.61980
2.62071
2.83150
2.83130
2.80787
2.80807
2.83465
2.83556
2.68122
2.68173
2.74323
2.74232
2.69598
2.69547
2.57894
2.57914
2.61043
2.61063
6H
M72X2
6g
2.78201
2.78162
2.74791
2.74740
2.77492
2.77531
2.75917
2.75968
2.83315
2.83295
2.82213
2.62233
2.83465
2.83516
2.78350
2.78389
2.80854
2.80803
2.79280
2.79241
2.74941
2.74961
2.76417
2.76397
6H
~
M75 X 1.5
6g
2.91315
2.91276
2.88756
2.88705
2.90685
2.90724
2.89504
2.69555
2.95150
2.95130
2.94220
2.94240
2.95276
2.95327
2.91441
2.91480
2.93457
2.93406
2.92276
2.92237
2.88882
2.88902
2.90063
2.90043
6H
~
See Notes at end of table.
~-<
~
"'
6
c:
z
~
~
--
-
---··-
~~g>
~ i~.
o~,-
li~~
g~~
~ ~~
Ht
TABLE 05
"~
1;
GAGIES FOR STANDARD THRIEAD StR!IES ClASSES 6g AND 6H
M PROfll.i: SCRil:W THREADS- UMITS Of S!Z!E (CUSTOMARY) (CONT'D)
[~
~m
Gages for Internal Threads
Gages for hternai Threads
~
s
g
X Thread Gages
X Thread Gages
~
I
ii'
3
:;:
"'
Nominal Size
and i'itch
I
I
· Z Plain Gages for
Major Oiam.
LO
GO
GO
l Major
Z Plain Gages for
Minor Diam.
HI
Class.
Pitch
Oiam.
Minor
Diam.
Pitch
Oiam.
Minor
Diam.
GO
NOT GO
Diam.
Pitch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOiGO
Class
1
2
3
4
5
6
7
B
9
10
11
12
13
14
15
M80X6
6g
2.99303
2.99252
2.89075
2.88984
2.98201
2.98252
2.93476
2.93567
3.14646
3.14626
3.12283
3.12303
3.14961
3.15052
2.99618
2.99669
3.05819
3.05728
3.01094
3.01043
2.89390
2.89410
2.92539
2.92519
6H
M80 X 2
6g
3.09697
3.09658
3.06287
3.06236
3.08988
3.09027
3.07413
3.07464
3.14811
3.14791
3.13709
3.13729
3.14961
3.15012
3.09846
3.09885
3.12350
3.12299
3.10776
3.10737
3.06437
3.06457
3.07913
3.07893
6H
M80 X 1.5
6g
3.11000
3.10961
3.08441
3.08390
3.10370
3.10409
3.09189
3.09240
3.14835
3.14815
3.13906
3.13926
3.14961
3.15012
3.11126
3.11165
3.13142
3.13091
3.11961
3.11922
3.08567
3.08587
3.09748
3.09728
6H
M85X2
6g
3.29382
3.29343
3.25972
3.25921
3.28673
3.28712
3.27098
3.27149
3.34496
3.34476
3.33394
3.33414
3.34646
3.34697
3.29531
3.29570
3.32035
3.31984
3.30461
3.30422
3.26122
3.26142
3.27598
3.27578
6H
M90 X6
6g
3.38673
3.38622
3.28445
3.28354
3.37571
3.37622
3.32846
3.32937
3.54016
3.53996
3.51654
3.51674
3.54331
3.54422
3.38988
3.39039
3.45189
3.45098
3.40465
3.40414
3.28760
3.28780
3.31909
3.31889
6H
M90 X 2
6g
3.49067
3.49028
3.45657
3.45606
3.48358
3.48397
3.46783
3.46834
3.54181
3.54161
3.53079
3.53099
3.54331
3.54382
3.49217
3.49256
3.51720
3.51669
3.50146
3.50107
3.45807
3.45827
3.47283
3.47263
6H
M95 X 2
6a
3.68752
3.68713
3.65343
3.65292
3.68004
3.68043
3.66429
3.66480
3.73866
3.73846
3.72764
3.72784
3.74016
3.74067
3.68902
3.68941
3.71461
3.71410
3.69886
3.69847
3.65492
3.65512
3.66969
3.66949
6H
g
M100 X6
6g
3.67815
3.67724
3.76862
3.76913
3.72138
3.72229
3.93386
3.93366
3.91024
3.91044
3.93701
3.93792
3.78358
3.78409
3.84657
3.84566
3.79933
3.79882
3.68130
3.68150
3.71280
3.71260
6H
I
3.78043
3.77992
M100 X 2
6g
3.88437
3.88398
3.85028
3.84977
3.87689
3.87728
3.86114
3.86165
3.93551
3.93531
3.92449
3.92469
3.93701
3.93752
3.88587
3.88626
3.9'1146
3.91095
3.89571
3.89532
3.85177
3.85197
3.86654
3.86634
6H
M105 X 2
61\
4.08122
4.08063
4.04713
4.04622
4.07374
4.07433
4.05799
4.05890
4.13236
4.13216
4.12134
4.12154
4.13386
4.13477
4.08272
4.06331
4.10831
4.10740
4.09256
4.09197
4.04862
4.04662
4.06339
4.06319
6H
zen
!2.2..
~~
~ 0
::0,.:...:.
w
-I
me
Ji
"'"'
0~
~.!:;
.:...~
;C::!
"'0
"'z
:iF=
~~
"'"
~~
g"
G) :I:
~
~
~c
z
Gl
©
~
~
~
----··-
5<'<' Nole> al c>nd of tahle.
-
iS~b>
_g ~~-
a 8.'3-
~~~
a· :I: s:
:::oom
~~~
1AISU 05 GAGES fOR STANDARD THREAD SERU:S Ct-A5SiE5.. 6g AND 6H
M PIROFn.IE SCRIEW THRiEADS-UMITS 0~ SiZE (CUSTOMARY) (CONi'D)
JH
1~
%:>
Gages lor h!emai Threads
Gages for tnternal Threads
[~
§.m
X Thread Gages
X Thread Gages
~
I
"~
a3
:;:
Z Plain Gages ior
Major Diam.
LO
GO
l
GO
Nominal Size
and Pitch
Class
Pitch
Diam.
Minor
Diam.
Pitch
Dlam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Pitch
Diam.
1
2
3
4
5
6
7
8
9
10
M110 X 2
6g
4.27807
4.27748
4.24398
4.24307
4.27059
4.27118
4.25484
4.25575
4.32921
4.32901
4.31819
4.31839
4.33071
4.33162
M120 X 2
6g
4.67177
4.67118
4.63768
4.635n
4.66429
4.66488
4.64854
4.64945
4.72291
4.72267
4.71189
4.71213
M130 X 2
6g
5.06547
5.06488
5.03138
5.03047
5.05799
5.05858
5.04224
5.04315
5.11661
5.11637
M140 X 2
6g
5.45917
5.45858
5.42508
5.42417
5.45169
5.45228
5.43594
5.43685
M150 X 2
6g
5.85287
5.85228
5.81878
5.81787
5.84539
5.84598
M160 X 3
6g
6.22059
6.22000
6.16945
6.16835
M170 X 3
6g
6.61429
6.61370
M180 X 3
6g
j
M190 X 3
"'Ci
M200 X 3
en
zmo
=~
~0
~~
ft~
w
co
Major
Diam.
Pitch
Diam.
GO
NOT GO
Class
11
12
i3
14
15
4.27957
4.28016
4.30516
4.30425
4.28941
4.28882
4.24547
4.24567
4.26024
4.26004
6H
4.72441
4.72532
4.67327
4.67386
4.69686
4.69795
4.68311
4.68252
4.63917
4.63941
4.65394
4.65370
6H
5.10559
5.10583
5.11811
5.11902
5.06697
5.06756
5.09256
5.09165
5.07681
5.07622
5.03287
5.03311
5.04764
5.04740
6H
5.51031
5.51007
5.49929
5.49953
5.51181
5.51272
5.46067
5.46126
5.48626
5.48535
5.47051
5.46992
5.42657
5.42681
5.44134
5.44110
6H
5.82965
5.83056
5.90402
5.90378
5.89299
5.89323
5.90551
5.90642
5.85437
5.85496
5.87996
5.87905
5.86421
5.86362
5.82028
5.82052
5.83504
5.83480
6H
6.21177
6.21236
6.18815
6.18925
6.29732
6.29706
6.28256
6.28280
6.29921
6.30031
6.22248
6.22307
6.25791
6.25681
6.23429
6.23370
6.17134
6.17158
6.19102
6.19078
6H
6.56315
6.56205
6.60547
6.60606
6.58185
6.58295
6.69102
6.69070
6.67626
6.67658
6.69291
6.69401
6.61618
6.616n
6.65161
6.65051
6.62799
6.62740
6.56504
6.56536
6.58472
6.58440
6H
7.00799
7.00740
6.95685
6.95575
6.99917
6.99976
6.97555
6.97665
7.08472
7.08440
7.06996
7.07028
7.08661
7.08n1
7.00988
7.01047
7.04531
7.04421
7.02169
7.02110
6.95874
6.95906
6.97843
6.97811
6H
6g
7.40169
7.40110
7.35055
7.34945
7.39185
7.39244
7.36823
7.36933
7.47843
7.47811
7.46366
7.46398
7.48031
7.48141
7.40358
7..40417
7.44039
7.43929
7.416n
7.41618
7.35244
7.35276
7.37213
7.37181
6H
6g
7.79539
7.79480
7.74425
7.74315
7.78555
7.78614
7.76193
7.76303
7.87213
7.87181
7.85736
7.85768
7.87402
7.87512
7.79728
7.79787
7.83409
7.83299
7.81047
7.80988
7.74614
7.74646
7.76583
7.76551
6H
~~
'f"Z
~~
,.,o
,.,z
_,.
I
:....•
_,.
Z Plain Gages ~or
Minor Diam.
HI
!'-'?:S::::
"'"
s:z
Q:I:
-<m
g
s:
:;g
~
g
c:
z
---
Q
(§)
z
GENERAl NOTE: All GO gages are the same as 4g6g sizes.
5
""
~
~
NOTE:
(1) M14 X 1.25- special thread for spark plugs only. See applicable document for thread tolerance class and limiting dimensions.
Z"tl(l
iii
0."
0
fH
:::l
C..Q
i~~
~gg
t51'tl~
TABlE 06 SETTiNG GAGES fOR STANDARD THRIEAD SERIES O.ASStES 6g AND 6H
M PR.OfU.E SCRIEW THREADS- UMITS O!F SUZiE {CUSTOMARY} .
l!
[~
I
~.rn
I
i
~-
W il"hread-SeUing Plugs
Major Oiam.
:;:
Nominal Size
and Pitch
Class
1
2
M1.6 X 0.35
6g
M2 X 0.4
I
6g
\0
NZ
->
:..;.r-
Pitch
Diam.
Pitch
Diam.
Minor
Diarn.
I? itch
Diam.·
Minor
Diam.
Class
5
6
7
8
9
10
11
12
13
0.05358
0.05327
0.06071
0.06110
0.05083
0.05095
...
...
. ..
. ..
0.05319
0.07799
0.07830
0.06776
0.06764
0.06827
0.06795
0.07673
0.07704
0.06512
0.06524
...
. ..
. ..
. ..
. ..
. ..
..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
. ..
...
...
. ..
. ..
...
. ..
. ..
. ..
. ..
...
. ..
. ..
3
4
0.05606
0.05575
o.o6224
0.06255
0.07091
0.07060
I
I 0.05331
Full
...
0.00689
0.08658
0.09661
0.09692
0.08335
0.08347
...
...
M3 X0.5
6g
0.10846
0.10815
0.11732
0.11763
0.10453
0.10441
0.10551
0.10520
0.11657
0.11688
0.10157
0.10169
M3.5 X0.6
6g
0.12634
0.12603
0.13697
0.13728
0.12161
0.12149
0.12299
0.12268
0.13669
0.13700
0.11827
0.11839
M4 X0.7
6g
0.14421
0.14390
0.15661
0.15692
0.13870
0.13858
0.14067
0.14036
0.15661
0.15692
0.13516
0.13528
...
...
...
...
...
...
~~
"'"
""
~~
"
Form
0.08614
0.08602
\"z
t~
NO
Truncated
full
Form
0.09764
0.09795
m o
~~
Pitch
Diam.
Truncated
0.08969
0.08938
::0,.:.:,
HI
Major Diam.
6g
Qc
Jj
I
M2.5 X 0.45
w
&€?
::::;c::
GO
LO
GO
~
"'
W iluead-Setting Rings
. ..
. ..
. ..
M5 xo.8
6g
0.18173
0.18142
0.19591
0.19622
0.17543
0.17531
0.17799
0.11768
0.19591
0.19622
0.17169
0.17181
0.17638
0.17650
0.16276
0.16245
0.18130
0.18118
0.17063
0.17032
6H
M6X1
6g
0.21748
0.21697
0.23520
0.23571
0.20961
0.20949
0.21307
0.21256
0.23520
0.23571
0.20520
0.20532
0.21063
0.21075
0.19358
0.19307
0.21654
0.21642
0.20287
0.20236
6H
M8 X 1.25
6g
0.29173
0.29122
0.31386
0.31437
0.28189
0.28177
0.28709
0.28658
0.31386
0.31437
0.27724
0.27736
0.28299
0.28311
0.26169
0.26118
0.28929
0.28917
0.27213
0.27162
6H
"'d
c:
M8X1
6g
0.31394
0.31445
0.28835
0.28823
0.29181
0.29130
0.31394
0.31445
0.28394
0.28406
0.28937
0.28949
0.27232
0.27181
0.29528
0.29516
0.28161
0.28110
6H
&l
~
0.29622
0.29571
See Notes at end of table.
0
~
1~
~
z
~
~
-----·-
-
----
Z"'O(")
~ ~~
l[~
~~~
o:rs:
::~com
~[a
~; ~
~§ g·
~ ~ ~
TABU D6 SiEITiNG GAGH:S !FOR ST ANDA:RD THREAD §I:Ril:S CiASSlE§ 6g AND 6H
M PROfillE SCRiEW THREADS- UMITS Of SIZE (CUSTOMARY) {CONT'Dj
]~
=>
[~
rn
~
I
I
i3
3
5"
"'
Nominal Size
and Pitch
~-
GO
I
Major Diam.
II
Class
I
Truncated
I
I
I
full
Form
I
I
I
W Thread-Se!ting Rings
GO
LO
I
HI
Major Diam.
!'itch
Diam.
Truncated
full
form
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
Class
5
6
7
a
9
13
11
12
13
0.39244
0.39295
0.34890
0.34902
0.35535
0.35547
0.32976
0.32925
0.36244
0.36232
0.34157
0.34106
6H
2
3
M10 X 1.5
6g
0.36591
0.36540
0:39244
0.39295
0.35409
0.35397
0.36071
0.36020
M10 X 1.25
6g
0.37047
0.36996
0.39260
0.39311
0.36063
0.36051
0.36583
0.36532
0.39260
0.39311
0.35598
0.35610
0.36173
0.36185
0.34043
0.3:!992
0.36803
0.36791
0.35087
0.35036
M10 X 0.75
6g
0.37957
0.37926
0.39283
0.39314
0.37366
0.37354
0.37563
0.37532
0.39283
0.39314
0.36972
0.36984
0.37453
0.37465
0.36173
0.36142
0.37972
0.37960
0.36921
0.36890
6H
M12 X 1.75
6g
0.44012
0.43953
0.47110
0.47169
0.42634
0.42622
0.43421
0.43362
0.47110
0.47169
0.42043
0.42055
0.42768
0.42780
0.39787
0.39728
0.43555
0.43543
0.41047
0.40988
6H
M12 X 1.5
6g
0.44465
0.44414
0.47118
0.47169
0.43283
0.43271
0.43913
0.43862
0.47118
0.47169
0.42732
0.42744
0.43409
0.43421
0.40850
0.40799
0.44157
0.44145
0.45969
0.45918
6H
M12 X 1.25
6g
0.44921
0.44870
0.47134
0.47185
0.43937
0.43925
0.44402
0.44351
0.47134
0.47185
0.43417
0.43429
0.44047
0.44059
0.41917
0.41866
0.44756
0.44744
0.42961
0.42910
6H
M12 X 1
(Note 1)
6g
0.45370
0.45319
0.47142
0.47193
0.44583
0.44571
0.44906
0.44855
0.47142
0.47193
0.44118
0.44106
0.44685
0.44697
0.42980
0.42929
0.45315
0.45327
0.43909
0.43858
6H
M14 X 2
6g
0.51429
0.51370
0.54969
0.55028
0.49854
0.49834
0.50799
0.50740
0.54969
0.55028
0.49224
0.49244
0.50004
0.50024
0.46594
0.46535
0.50839
0.50819
0.48071
0.48012
6H
I
M14 X 1.5
6g
0.52339
0.52288
0.54992
0.55043
0.51157
0.51141
0.51787
0.51736
0.54992
0.55043
0.50606
0.50622
0.51283
0.51299
0.48724
0.48673
0.52031
0.52015
0.49906
0.49855
6H
zG)
M15 X 1
6g
0.57181
0.57130
0.58953
0.59004
0.56394
0.56378
0.56717
0.56666
0.58953
0.59004
0.55929
0.55945
0.56496
0.56512
0.54791
0.54740
0.57126
0.57110
0.55720
0.55669
6H
ZC/l
0
w Thread-Seiting Plugs
r ------- ( --
[
0
;;a:
Q 0
;;tl-a
4
-1
6H
~
0
~a;
~g::
~~
'fz
~~
~5
.,z
_,
~·
~~
"'"
s:z
-<m
g
G):J:
"'
~
g
Rl
~c
@
~0
~
"'
)>
See Notes at end of !able.
5=:PQ
tU
Hfg
2.~ 6;
o·J: s=
~"'m
~g
~f.l!£.
TABlE 06 SHT!NG GAGIES !FOR STANDARD IHR.fAD SfRHIES CLASSES 6g AND 6H
M !PROfilE SCREW H-BUADS-UMRTS Of SiZE (C'USTOMARY} (CONT'D)
~~
=>
[~
1=
~m
[
W Thread-Setting Plugs
f
GO
a3
"
Z<n
0
0
~~
~
Nominal Size
and Pilch
Class
Truncated
Form
Pilch
Diam.
1
2
3
4
5
M16 X 2
6g
0 .. 59303
0 . 59244
0.62843
0. 62902
M16 >< 1.5
6g
0.60213
0. 60162
M17 X 1
6g
M18 X 1.5
Full
Pitch
Diam.
6
7
0.57728
0.57708
0.58673
0.58614
0.62866
0.62917
0.59031
0.59015
0.65055
0. 65004
0. 66827
0.66878
6g
0. 68087
0. 68036
M20 X 2 . 5
6g
M20 X 1..5
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diarn.
Class
3
9
to
11
12
13
0.62843
0.62902
0 . 57098
0.57118
0.57878
0 . 57898
0.54469
0.54410
0. 58713
0 . 58693
0 . 55945
0. 55886
6H
0.59661
0.59610
0.62866
0. 62917
0.58480
0.58496
0..59157
0.59173
0.56598
0.56547
O. S9906
0.59890
0.57780
0 . 57729
6H
0.64268
0.64252
0.63173
0.63122
0. 66827
0.66878
0.63803
0.63819
0.64370
0.64386
0.62665
0.62614
0 . 65000
0 . 64984
0 . 63594
0.63543
6H
0..70740
0.70791
0.66906
0.66890
0.67535
0.67484
0..70740
0.70791
0.66354
0 . 66370
0.67031
0.67047
0.64472
0.64421
0.67780
0.67764
0.65654
0. 65603
6H
0.74150
0.74091
0. 78575
0.78634
0.72181
0.72161
0.73480
0.73421
0.78575
0.78634
0..71512
0..71532
0.64472
0 . 64492
0 . 68087
0.68028
0..73228
0..73208
0.69858
0. 69799
6H
6g
0..75961
0..75910
0.78615
0.78666
0..74780
0..74764
0.75409
0.75!l53
0..78615
0.78666
0.74228
0.74244
0..74906
0..74922
0.72346
0.72295
0.75654
0.75638
0..73528
0..73477
6H
M20 Xi
6g
0..76866
0..76815
0..78638
0 . 78689
0.76079
0 . 76063
0.76402
0 . 76351
0..78638
0 . 78689
0..75614
0..75630
0.76181
0 . 76197
0..74476
0..74425
0.76811
0.76795
0. 75406
0. 75355
6H
M22 X 2.5
6g
0.82024
0 . 81965
0 . 86449
0.86508
0. 80055
0. 80035
0 . 81354
0.81295
0.86449
0. &6508
0..79386
0.79406
0 . 80220
0.80240
0.75961
0..75502
0 . 81102
0.81082
0..77732
0.77673
6H
M22 X 1.5
6g
0. 83835
0 . 83784
0.86488
0. 86539
0.82654
0.82638
0.83283
0 . 83232
0. 86488
0.86539
0.82102
0 . 82118
0.82780
0. 82796
0 . 80220
0.80169
0.83528
0 . 83512
0.81402
0.81351
6H
M24 X 3
6g
0 . 88988
0 . 88929
0.94299
0.94358
0.86626
0 . 86606
0.88201
0.88142
0.94299
0.94358
0.85839
0.85859
0. 86815
0.86835
0. 81701
0 . 81642
0.87858
0.87838
0.83669
0.83610
6H
g:~
"'"'
~511
..,-
HI
full
form
;;J,:..:.
~~
GO
lOajor Oiam.
Major Diam.
"E
W Thread-Selling Rings
~~
ted
-·
"'0
"'z
~>
~~
"'O
QJ:
S::'>'
-<m
0
0
s::
~
1
~
"'d
c
zQ
@
z
~
g,.
,.
~
~
St>P. Not I'!> .!I Pnd of !Jbll' .
~~.g
a ==·"<
l~~
§.~l;
O:I:S:
::~
oom
Q§2:
::1 C.rn
~~~
~~~
on=:
"'~-
SHTBNG GAGIES !FOR STANDARD THREAD SIEIIHES CLASS!ES 6g AND iiiH
M PROfU.IE SCREW THREADS- UMaTS OF SiZE (CUSTOMARY} (CONT'D)
l!
TABLE 06
[~
~m
[
W Thread-Selling Plugs
§
W Thread-Selling Rings
GO
~
:3'
LO
GO
HI
3
:;:
Major Diam.
"'
~~
=u-a
Nominal Size
and :Pitch
Class
Truncated
!Full
Form
Oiam.
Truncated
Form
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
Pilch
Diam.
Minor
Diam.
Class
1
2
3
.;
5
6
7
8
9
10
11
12
13
M24X 2
6g
0.90799
0.90740
0.94339
0.94398
0.89224
0.89204
0.90130
0.90071
0.94339
0.94398
0.88555
0.88575
0.89374
0.89394
0.85965
0.85906
0.90256
0.90236
0.87441
0.87382
6H
M25 X 1.5
6g
0.95646
0.95595
0.98299
0.98350
0.94465'
. 0.94449
0.95055
0.95004
0.98299
0.98350
0.93874
0.93890
0.94591
0.94607
0.92031
0.91980
0.95378
0.95362
0.93213
0.93162
6H
M27 X 3
6g
1.00799
1.00740
1.06110
1.06169
0.98437
0.98417
1.00012
0.99953
1.06110
. 1.06169
0.97650
0.97670
0.98626
0.98646
0.93512
0.93453
0.99669
0.99649
0.95480
0.95421
6H
M27 X 2
6g
1.02610
1.02551
1.06150
1.06209
1.01035
1.01015
1~01941
1.06150
1.06209
1.00366
1.00386
1.01185
1.01205
0.97776
0.97717
1.02067
1.02047
0.99252
0.99193
6H
1.01882
~
Pitch
N
o~
~~
~~
2,!!;
Maior Oiam.
Full
\"z
M30 X 3.5
6g
1.11709
1.11638
1.17902
1.17973
1.08953
1.08933
1.10874
1.10803
1.17902
1.17973
1.08118
1.08318
1.09161
1.09181
1.03193
1.03122
1.10264
1.10244
1.05398
1.05327
6H
~~
M30 X 2
6g
1.14421
1.14362
1.17%1
1.18020
1.12846
1.12826
1.13752
1.13693
1.17961
1.18020
1.12177
1.12197
1.12996
1.13016
1.09587
1.09528
1.13878
1.13858
1.11063
1.11004
6H
M30 X 1.5
6g
1.15331
1.15280
1.17984
1.18035
1.14150
1.14134
1.14740
1.14689
1.17984
1.18035
1.13559
1.13575
1.14276
1.14292
1.11716
1.11665
1.15063
1.15047
1.12898
1.12847
6H
M33X2
6g
1.26232
1.26173
1.29772
1.29823
1.24647
1.24627
1.25563
1.25504
1.29772
1.29823
1.23988
1.24008
1.24807
1.24827
1.21398
1.21339
1.25689
-1.25669
1.22874
1.22815
6H
M35 X 1.5
6g
1.35016
1.34965
1.37669
1.37720
1.33835
1.33819
1.34425
1.34374
1.37669
1.37720
1.33244
1.33260
1.33961
1.33977
1.31402
1.31351
1.34748
1.34732
1.32583
1.32532
6H
z
M36X4
6g
1.34417
1.34346
1.41496
1.41567
1.31268
1.31248
1.33535
1.33464
1.41496
1.41567
1.30386
1.30406
1.31504
1.31524
1.24685
1.24614
1.32685
1.32665
1.27047
1.26976
6H
~
See Notes at end of table.
~~
.,o
~~
Gl:l:
"'"
s:z
-<m
0
0
s:
:;;
~
g
!~
OJ
Ci
c
£l
~0
~
--
__ , -- -
iU
§~~
55:;;:
~oorn
Q§~
~
0. 0
e.~3
if.-~.-
~ U) :ll
~m-
-g~
TAiBU: 06 §EITING GAGtS fOR STANDARD THi<EAD SiERii\:5 ClASSiES 6g AND 6H
M PROF!U: SCRIEW THREADS- UJ\.UTS OF S!ZE (CUSTOMARY) (CONI' D)
~~
o.s.
<m
~~
W Thread-Setting !'lugs
f
W Thread-Setting Rings
GO
:3'
3
Major Diam.
5:
"'
Nomina! Size
anrll'itch
Class
1
I
GO
LO
HJ
I
Major Diam.
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Truncated
Full
Form
Diam.
Class
5
6
i
8
9
10
11
12
13
1.41583
1.41642
1.36469
1.36449
1.37374
1.37315
1.41583
1.41642
1.35799
1.35619
1.36616
1.36638
1.33209
1.33150
1.37500
1.37480
1.34585
1.34626
6H
1.49854
1.49795
1.53394
1.53453
1.48280
1.48260
1.49185
1.49126
1.53394
1.53453
1.47610
1.47630
1.48429
1.48449
1.45020
1.44961
1.49311
1.49291
1.46496
1.46437
6H
6g
1.54701
1.54650
1.57354
1.57405
1.53520
1.53500
1.54110
1.54059
1.57354
1.57405
1.52929
1.52949
1.53646
1.53666
1.51087
1.51036
1.54433
1.54413
1.52268
1.52217
6H
M42 X 4.5
6g
1.57142
1.57063
1.65106
1.65185
1.53598
1.53574
1.56213
1.56134
1.65106
1.65185
1.52669
1.52693
1.53846
1.53870
1.46177
1.46098
1.55087
1.55063
1.48815
1.48736
6H
M42X 2
6g
1.61665
1.61606
1.65205
1.65264
1.60091
1.60067
1.60996
1.60937
1.65205
1.65264
1.59421
1.59445
t60240
1.60264
1.56831
1.56772
1.61122
1.61098
1.58307
1.58248
6H
M45 X 1.5
6g
1.74386
1.74335
1.77039
1.77090
1.73205
1.73185
1.73795
1.73744
1.77039
1.77090
1.72614
1.72634
1.73331
1.73351
1.70772
1.70721
1.74118
1.74098
1.n953
1.71902
6H
M48 X5
6g
1.79846
1.79767
1.88697
1.88776
1.75909
1.75885
1.78862
1.78783
1.88697
1.88776
1.74925
1.74949
1.76189
1.76213
1.67665
1.67586
1.77508
1.77484
1.70461
1.70382
6H
~
Rl
M48 X 2
6g
1.85287
1.85228
1.88827
1.88886
1.83713
1.83689
1.84579
1.84520
1.88827
1.88886
1.83004
1.83028
1.83862
1.83886
1.80453
1.80394
1.84791
1.84767
1.81929
1.81870
6H
~
M50 X 1.5
6g
1.94071
1.94020
1.96724
1.96775
1.92890
1.92870
1.93441
1.93390
1.96724
1.96775
1.92260
1.92280
1.93016
1.9303"6
1.90457
1.90406
1.93850
1.93830
1.91638
1.91587
6H
M55 X 1.5
6g
2.13756
2.13705
2.16409
216460
2.12574
2.12554
2.13126
213075
2.16409
2.16460
2.11945
2.11965
2.12701
2.12721
2.10142
2.10091
2.13535
2.13515
2.11323
2.11272
6H
ZG?O
2,..Q..:::!
Q'~
:;u,:..:,
-
Truncated
Diam.
2
3
4
M36X 2
6g
1.38043
1.37984
M39X 2
6g
M40 X 1.5
~
w
g:~
~~
~~
Pitch
Full
form
~~
NO
.,z
~>
:.lr
~~
"'"
;::z
GlJ:
-<m
"
~
~
~
~
c:
z
Gl
@
~
~
~
----
See Notes at end of table.
·--
zuo
ca,g
] ~i
~~~
§~ffi
iH
~~i
TABlE D6 SETTiNG GAGES fOR ST ANOARD THR!EAO SiEiiUES ClASSES 6g AND 61H
M iPROflllE SCREW THREADS- UM!TS Of S§ZE (CUSTOMARY} (CONT'D}
l!
[~
~- m
~
W Thread-Selling Plugs
[
W Thread-Setting Rings
zooa
;;~~
go
::o-E;
~
~
I
Form
Trum:ated
full
form
Oiam.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
Class
3
4
5
6
7
8
9
10
11
12
13
6g
2.10441
2.10362
2.20177
2.20256
2.06114
2.06090
2.09402
2.09323
2.20177
2.20256
2.05071
2.05095
2.06409
2.06433
1.97031
1.96952
2.07807
2.07783
1.99984
1.99905
6H
M56 X 2
6g
2.16783
2.16724
2.20323
2.20382
2.15209
2.15185
2.14500
2.14441
2.10323
2.20382
2.14500
2.14524
2.15358
2.15382
2.11949
2.11890
2.16287
2.16263
2.13425
2.13366
6H
M60 X 1.5
6g
2.33441
2.33390
2.36094
2.36145
2.32260
2.32240
2.32811
2.32760
2.36094
2.36145
2.31630
2.31650
2.32386
2.32406
2.29827
2.29776
2.33220
2.33200
2.31008
2.30957
6H
M64 X 6
6g
2.41035
2.40944
2.51654
2.51745
2.36311
2.36287
2.39933
2.39842
2.51654
2.51745
2.35209
2.35233
2.36626
2.36650
2.26398
2.26307
2.38102
2.38078
2.29547
2.29456
6H
M64 X2
6g
2.48280
2.48221
2.51819
2.51878
2.46705
2.46681
2.47571
2.47512
2.51819
2.51878
2.45996
2.46020
2.46854
2.46878
2.43445
2.43386
2.47783
2.47759
2.44921
2.44862
6H
M65 X 1.5
6g
2.53126
2.53075
2.55780
2.55831
2.51945
2.51925
2.52496
2.52445
2.55780
2.55831
2.51315
2.51335
2.52071
2.52091
2.49512
2.49461
2.52906
2.52886
2.50693
2.50642
6H
M70 X 1.5
6g
2.72811
2.72760
2.75465
2.75516
2.71630
2.71610
2.72181
2.72130
2.75465
2.75516
2.71000
2.71020
2.71756
2.71776
2.69197
2.69146
2.73772
2.73752
2.70378
2.70327
6H
M72 X 6
6g
2.72531
2.72440
2.83150
2.83241
2.67807
2.67783
2.71429
2.71336
2.83150
2.83241
2.66705
2.66729
2.68122
2.68146
2.57894
2.57803
2.69598
2.69574
2.61043
2.60952
6H
M72X 2
6g
2.79776
2.79717
2.83315
2.83374
2.78201
2.78177
2.79067
2.79008
2.83315
2.83374
2.77492'
2.77516
2.78350
2.78374
2.74941
2.74882
2.79280
2.79256
2.76417
2.76358
6H
M75 X 1.5
6g
2.92496
2.92445
2.95150
2.95201
2.91315
2.91295
2.91866
2.95150
2.95201
2.90685
2.90705
2.91441
2.91461
2.88882
2.88831
2.92276
2.92256
2.90063
2.90012
6H
Class
Truncated
1
2
M56 X 5.5
I
s-~
~~
--
Pilch
Diam.
Nominal Size
and Pitch
g: ~
~~
HI
Major Diam.
Major Diam.
S:
"'
GO
!0
GO
a
3
;G=!
~o
full
Pilch
~z
~>
:....•
!-;IS:
~>
~0
OJ:
s:z
-tm
0
g
~
<
"§
~
~
~
c
z
0
@
~0
1'
~
i
, See Notes at end of table.
- .
-
-
~.91815
z-.,n
o ac
ill
§.~G
5" :c~
::lOOm
; [a
~ ~~
ill
TAilUiE 06 SHTY!'tlG GAGES fOR ST A.NDARD THRitAD SiEilm:s Ci.. ASSiES 6g AND 621
M PROF!!..£ SCREW THRIEADS- UMHS OIF SIZt (CUSTOMARY) {CONT'D)
g~
@:)>
[~
·,....--
~.m
i
W Thread-Setting Plugs
i"
I
GO
~
Major Diam.
5:
"'
W Thread-Setting Rings
GO
lO
HI
Major Diam.
full
form
Pitch
Diam.
Pilch
Diam.
Minor
Oiam.
Pilch
Diam.
Mir.or
Diam.
Class
7
8
9
10
11
12
13
3.02925
3.02834
3.14646
3.14737
2.98201
2.98225
2.99618
2.99642
2.89390
2.89299
3.01094
3.01070
2.92539
2.92448
6H
3.09697
3.09673
3.10563
3.10504
3.14811
3.14870
3.08988
3.09012
3.09846
3.09870
3.06437
3.06378
3.10776
3.10752
3.07913
3.07854
6H
3.14835
3.14886
3.11000
3.10980
3.11551
3.11500
3.14835
3.14886
3.10370
3.10390
3.11126
3.11146
3.08567
3.08516
3.11961
3.11941
3.09748
3.09697
6H
3.30957
3.30898
3.34496
3.34555
3.29382
3.29358
3.30248
3.30185
3.34496
3.34555
3.28673
3.28697
3.29531
3.29555
3.26122
3.26063
3.30461
3.30437
3.27598
3.27539
6H
6g
3.43398
3.43307
3.54016
3.54107
3.38673
3.38645
3.42295
3.42204
3.54016
3:54107
3.37571
3.37595
3.38988
3.39012
3.28760
3.28669
3.40465
3.40441
3.31909
3.31818
6H
M90 X2
6g
3.54181
3.54240
3.49067
3.49043
3.49933
3.49874
3.54181
3.54240
3.48358
3.48382
3.49217
3.49241
3.45807
3.45746
3.50146
3.50122
3.47283
3.47224
6H
G1:I:
"'"
s:z
-;m
"~
3.50642
3.50583
M95 X 2
6g
3.70327
3.70268
3.73866
3.73925
3.68752
3.68726
3.69579
3.69520
3.73866
3.73925
3.68004
3.68026
3.68902
3.68926
3.65492
3.65433
3.69886
3.69862
3.66969
3.66910
6H
g
M100 X 6
6g
3.82768
3.82677
3.93386
3.93477
3.78043
3.78019
3.81587
3.81496
3.93386
3.93477
3.76862
3.76886
3.78358
3.78382
3.68130
3.68039
3.79933
3.79909
3.71280
3.71189
6H
M100 X 2
6g
3.90012
3.89953
3.93551
3.93610
3.88437
3.88413
3.89264
3.89205
3.93551
3.93610
3.87689
3.87713
3.88587
3.88611
3.85177
3.85118
3.89571
3.89547
3.86654
3.86595
6H
M105 X 2
6g
4.09697
4.09606
4.13236
4.13327
4.08122
4.08091
4.08949
4.08858
4.13236
4.13327
4.07374
4.07405
4.08272
4.08303
4.04862
4.04771
4.09256
4.09225
4.06339
4.06248
6H
Nominal Si%1!
~~
go
Full
and Pitch
Class
Truncated
form
!'itch
Diam.
Truncated
1
2
3
4
5
6
M80X 6
6g
3.04028
3.03937
3.14646
3.14737
2.99303
2.99279
M80 X 2
6g
3.11272
3.11213
3.14811
3.14870
M80 X 1.5
6g
3.12181
3.12130
M85 X 2
6g
M90X6
~
U1
::0,:.:.
m o
Jj
~~
I
~~
;G=!
"'0
"'z
~,.
~r­
!l?S::
~>
~
z
-<
~
~
~
c
z
G1
1§1
z
~
~
~
~
--·---
See Notes at end of table.
Z"lJC"l
oa,g
iti
a~t;;
g·~ffi
~~~
~;,g
~gg
c6:f:2.
TA~UE
D6 §HTSNG GAGE§ fO!R STANDARD THREAD SIERBiES ClASSES 6g AND 6H
M PROF! LIE SCREW THREADS- LIMITS OIF SiZE (CUSTOMARY) (CONT'D}
g~
g,>
[~
~m
W Thread-Setting Rings
W Thread-Setting Plugs
~
Ia
!
Major Diam.
3
-----
I
GO
I
:;:
GO
LO
HI
Major Diam.
UJ
~~~
a?fo
~~
Pitch
Diam.
Diam.
Class
6
7
s
9
10
11
12
13
4.27807
4.27776
4.28534
4.28543
4.32921
4.33012
4.27059
4.27090
4.27957
4.27988
4.24547
4.24455
4.28941
4.28911
4.25024
4.25933
6H
4.72291
4.72382
4.67177
4.67146
4.68004
4.67913
4.~2291
4.66429
4.66460
4.67327
4.67358
4.63917
4.63826
4.68311
4.68280
4.65394
4.65303
6H
4.72382
Pilch
Diam.
1
2
3
4
5
M110 X 2
6g
4.29382
4.29291
4.32921
4.33012
M120 X 2
6g
4.68752
4.68661
l
M130 X 2
6g
5.08122
5.08031
5.11561
5.11752
5.06547
5.06516
5.07374
5.07283
5.11661
5.11752
5.05799
5.05830
5.06697
5.06728
5.03287
5.03196
5.07681
5.07650
5.04764
5.04673
6H
M140X2
6g
5.47492
5.47401
5.51031
5.51122
5.45917
5.45886
5.46744
5.46653
5.51031
5.51122
5.45159
5.45200
5.46067
5.46098
5.42657
5.42566
5.47051
5.47020
5.44134
5.44043
6H
M150 X 2
6g
5.86862
5.86771
5.90402
5.90493
5.85287
5.85256
5.86114
5.86023
5.90402
5.90493
5.84539
5.84570
5.85437
5.85468
5.82028
5.81937
5.86421
5.86390
. 5.83504
5.83413
6H
M160 X 3
6g
6.24421
6.24330
6.29732
6.29823
6.22059
6.22028
6.23539
6.23448
6.29732
6.29823
6.21177
6.21208
6.22248
6.22279
6.17134
6.17043
6.23429
6.23398
6.19102
6.19011
6H
M170 X 3
6g
6.63791
6.63700
6.69102
6.69193
6.61429
6.61398
6.62909
6.62818
6.69102
6.69193
6.60547
6.60578
6.61618
6.61649
6.56504
6.56413
6.62799
6.62768
6.58472
6.58381
6H
M180 X 3
6g
7.03161
7.03070
7.08472
7.08563
7.00799
7.00768
7.02280
7.02189
7.08472
7:08553
5.99917
6.99948
7.00988
7.01019
5.95874
5.95783
7.02159
7.02138
5.97843
5.97752
5H
M190 X 3
6g
7.42531
7.42440
7.47843
7.47934
7.40169
7.40138
7.41547
7.41456
7.47843
7.47934
7.39185
7.39216
7.40358
7.40389
7.35244
7.35153
7.41677
7.41646
7.37213
7.37122
6H
M200 X 3
6g
7.81902
7.81811
7.87213
7.87304
7.79539
7.79508
7.80917
7.80826
7.87213
7.87304
7.78555
7.78586
7.79728
7.79759
7.74614
7.74523
7.81047
7.81016
7.76583
7.76492
6H
~~
~~
Minor
Diam.
Full
form
\"z
~5
!'itch
Diam.
Truncated
$''§
m.,
~~
Pitch
Diam.
Class
,....
~
full
Form
Minor
Truncated
Nominal Size
and Pitch
"'S:
:.l)>
~(")
Gl;!;
S:z
-<m
"0
s:
~
z
-<
g
~
j
~
c:
z
Gl
@
~
5
~
-
..
GENERAL NOTE: All GO setting plug gages are the same as 4g6g sizes.
NOTE:
(1) M14 X 1.25 -special thread for spark plugs only. See applicable document for thread tolerance class and limiting dimensions,
~
-
Z"t!C"l
m
Q§:=
5 g-~
!if.
~iS!:!..
YAi:'liLE 07 GAGES !FOR STANDARD THREAD SBUES G.ASSiES 4g6g AND 6H
M PROfH.E SCREW lHR!:AD§- UMilS Of SIZIE {CUSTOMARY)
1!
f,jr.tJ
c.s:
:;m
r
Gages ior External Threads
.a
~-
'Gages for Internal Threads
X Thread Gages
X Thread Gages
3
1..0
GO
:;:
· Z Plain Gages for
Major Diam.
GO
Z !'lain Gages for
Minor Diam.
HI
"'
Nominal Size
and Pilch
Class
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Pitch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT GO
Class
1
2
3
4
5
6
7
a
9
10
11
12
13
14
15
M1.6 X 0.35
4g6g
0.05331
0.05311
0.04732
0.04701
0.05173
0.05193
0.04898
0.04929
0.06224
0.06212
0.05890
0.05902
0.06299
0.06330
0.05406
0.05426
0.06016
0.05985
0.05740
0.04807
0.04819
C.05201
0.05189
6H
1 o.o572o
M2 X 0.4
4g6g
0.06776
0.06756
0.06094
0.06055
0.06510
0.06630
0.06295
0.06334
0.07799
0.07787
0.07425
0.07437
0.07874
0.07913
0.06850
0.06870
0.07520
0.07481
0.07205
0.07185
0.06169
0.06181
0.06610
0.06598
6H
M2.5 X 0.45
4g6g
0.08614
0.08594
0.07846
0.07807
0.08437
0.08457
0.08083
0.08122
0.09764
0.09752
0.09370
0.09382
0.09843
0.09882
0.08693
0.08713
0.09421
0.09382
0.09067
0.09047
0.07925
0.07937
0.08417
0.08405
6H
M3 X 0.5
4g6g
0.10453
0.10433
0.09598
0.09559
0.10264
0.10284
0.09870
0.09909
0.11732
0.11720
0.11315
0.11327
0.11811
0.11850
0.10531
0.10551
0.11319
0.11280
0.10925
0.10905
0.09681
0.09693
0.10232
0.10220
6H
M3.5 X 0.6
4g6g
0.12161
0.12141
0.11138
0.11099
0.11953
0.11973
0.11480
0.11519
0.13697
6.13685
0.13205
0.13217
0.13780
0.13819
0.12244
0.12264
0.13157
0.13118
0.12685
0.12665
0.11220
0.11232
0.11850
0.11838
6H
M4 X 0.7
4g6g
0.13870
0.13850
0.12677
0.12638
0.13650
0.13670
0.13098
0.13137
0.15661
0.15649
0.15110
0.15122
0.15748
0.15787
0.13957
0.13959
0.14972
0.14933
0.12764
0.12744
0.12764
0.12776
0.13472
0.13460
6H
M5 X 0.8
4g6g
0.17543
0.17512
0.16181
0.16130
0.17307
0.17338
0.16677
0.16736
0.19591
0.19579
0.19000
0.19012
0.19685
0.19736
0.17638
0.17669
0.18760
0.18709
0.18130
0.18099
0.16276
0.16288
0.17063
0.17051
6H
M6 X 1
4g6g
0.19256
0.19205
0.20681
0.20712
0.19894
0.19945
0.23520
0.23508
0.22811
0.22823
0.23622
0.23673
0.21063
0.21094
0.22441
0.22390
0.21654
0.21623
0.19358
0.19370.
0.20287
0.20275
6H
j
0.20961
0.20930
M8 X 1.25
4g6g
0.26059
0.26008
0.27894
0.27925
0.26909
0.26960
0.31386
0.31374
0.30551
0.30563
0.31496
0.31547
0.28299
0.28330
0.29913
0.29862
0.28929
0.28898
0.26169
0.26181
0.27213
0.27201
6H
"'
(§
c
z
0.28189
0.28158
M8X1
4g6g
0.28835
0.28804
0.27130
0.27079
0.28555
0.28586
0.27768
0.27819
0.31394
0.31382
0.30685
0.30697
0.31496
0.31547
0.28937
0.28968
0.30315
0.30264
0.29528
0.29497
0.27232
0.27220
0.28161
0.28173
6H
zw
~:
"'o
·-i~
~~
\"z
~
....:1
~~
~a
_,.
"'z
:.....•
~~
Gl:I:
"'"
s::z
-<m
"
0
s:
~
1
Gl
!ill
I
~
0
~
--
See Notes at end of table.
----
z-,o
~ ~§
a8:~
~~~
g~ffi
~ [~
!U
~~
TABU: D7 GAGES fOR STANDARD YHlUAD SERIIES ClASS!tS 4g6g AND 6H
M PROfitiE SCREW TIHREADS-UMITS Of S§.ZE (CUSTOMARY) {CONT'D)
~):>
[~
§.m
i
I
Gages for External ih~eads
f
Gages for internal Threads
X Thread Gages
X Thread Gages
~
:;:
lO
GO
(JJ
Z Plain Gages for
Major Diam.
GO
NOT GO
Maior
Diam.
Pitch
Diam.
Major
Diam.
7
II
9
10
0.33894
0.33945
0.39244
0.39232
0.38315
0.38327
0.39370
0.39421
0.35768
0.35799
0.34783
0.34834
0.39260
0.39248
0.38425
0.38437
0.36087
0.36048
0.37118
0.37138
0.36528
0.36567
0.39283
0.39271
0.42634
0.42603
0.39650
0.39599
0.42260
0.42291
0.40882
0.40933
4g6g
0.43937
0.43906
0.41807
0.41756
0.43602
0.43633
M12X 1
(Note 1)
4g6g
0.44583
0.44552
0.42678
0.42827
"~
M14X2
4g6g
0.49854
0.49823
0
M14 X 1.5
4g6g
M15X 1
M16 X 2
zw
!2-Q..
Q'S
:uoa
~i
!?Q
o"'
"'"'
w~
~~
_,.
~·
_,
Gl:I:
"'"
s:z
Nominal Size
and Pitch
1
I
I
i
!
Pitch
Diam.
GO
NOT GO
I Class
11
12
13
14
15
0.35535
0.35566
0.37425
0.37374
0.36244
0.36213
0.32976
0.32988
0.34157
0.34145
6H
0.39370
0.39421
0.36173
0.36204
0.37787
0.37736
0.36803
0.36772
0.34043
0.34055
0.35087
0.35075
6H
0.38732
0.38744
0.39370
0.39409
0.37453
0.37473
0.38563
0.38524
0.37972
0.37952
0.36173
0.36185
0.36921
0.36909
6H
0.47110
0.47098
0.46067
0.46079
0.47244
0.47295
0.42768
0.42799
0.44933
0.44882
0.43555
0.43524
0.39787
0.39799
0.41106
0.41094
6H
0.42224
0.42275
0.47134
0.47121
0.46299
0.46287
0.47244
0.47295
0.44047
0.44078
0.45740
0.45689
0.44756
0.44705
0.41917
0.41929
0.42961
0.42949
6H
0.44287
0.44316
0.43500
0.43551
0.47142
0.47130
0.46433
0.46421
0.47244
0.47295
0.44685
0.44716
0.46102
0.46051
0.45315
0.45264
0.42980
0.42992
0.43909
0.43697
6H
0.46445
0.46394
0.49461
0.49492
0.47886
0.47937
0.54969
0.54957
0.53866
0.53878
0.55118
0.55169
0.50004
0.50035
0.52413
0.52362
0.50839
0.50808
0.46594
0.46606
0.48071
0.48059
6H
0.51157
0.51126
0.48598
0.48547
0.50803
0.50634
0.49622
0.49673
0.54992
0.54960
0.54063
0.54075
0.55118
0.55169
0.51263
0.51314
0.53213
0.53162
0.52031
0.52000
0.48724.
0.48736
0.49906
0.49894
6H
4g6g
0.56394
0.56363
0.54689
0.54636
0.56098
0.56129
0.55311
0.55362
0.58952
0.56940
0.58244
0.58256
0.59055
0.59106
0.56496
0.56527
0.57913
0.57662
0.57126
0.57095
0.54791
0.54803
0.55720
0.55708
6H
4g6g
0.57728
0.57759
0.54319
0.54266
0.57335
0.57366
0.55760
0.55611
0.62643
0.62831
0.61740
0.61752
0.62992
0.63043
0.57676
0.57909
0.60267
0.60236
0.58713
0.58681
0.54469
0.54481
0.55945
0.55933
6H
Class
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
GO
2
3
4
5
6
M10 X 1.5
4g6g
0.35409
0.35378
0.32850
0.32799
0.35075
0.35106
M10 X 1.25
4g6g
0.36063
0.36032
0.33983
0.33882
M10 X 0.75
4g6g
0.37366
0.37346
M12 X 1.75
4g6g
M12 X 1.25
~~
00'
.,o
.,z
~s::
Z Plain Gages for
Minor Diam.
HI
-<m
~
z
-<
m
I
~
c
z
Gl
@)
z
'!<
!________ _ _ - - - -
0
~
See Notes at end of table.
-
'---------
zuo
a
aa
.§ ~~­
a g_ 1§.
§'o-;
~i~
~[~
==oorn
[;~
0 =
0
0
~
~
~~ ~
TA3LE D7
~~
GAGES fOR ST ANDAIRD THREAD SfR!fS CLASSES 4g6g AND 6H
M PROW.!: SCREW THRtADS-liMHS OF Siz:E (CUSTOMARY) (CONT'D)
~~
I
;;_m
I
Gages for htl!rnal Threads
Gages lor internal Threads
X Thread G<Jges
Q
~
X Thread Gages
Z Plain Gages lor
Major Diam.
0
a3
GO
1..0
GO
Z Plain Gages lor
Minor Diam.
HI
5:
en
Nominal Size
and Pitch
Pilch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Pitch
Diam.
.~ajor
Class
Diam.
I' itch
Diam.
GO
NOT GO
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M16 X 1.5
4g6g
0.59031
0.59000
0.56472
0.56421
0.58677
0.58708
0.57496
0.57547
0.62866
0.62854
0.61937
0.61949
0.62992
0.63043
0.59157
0.59188
0.61087
0.61036
0.59906
0.59875
0.56598
0.56610
0.57780
0.57768
6H
M17 X 1
4g6g
0.64268
0.64237
0.62563
0.62512
0.63972
0.64003
0.63185
0.63236
0.66827
0.66815
O.E6118
0.66130
0.66929
0.66980
0.64370
0.64401
0.65787
0.65736
0.65000
0.64969
0.62665
0.62677
0.63594
0.63582
6H
M18 X 1.5
4g6g
0.66906
0.66875
0.64346
0.64295
0.66551
0.66582
0.65370
0.65421
0.70740
0.70728
0.69811
0.69823
0.70866
0.70917
0.67031
0.67062
0.68961
0.68910
0.67780
0.67749
0.64472
0.64484
0.65654
0.65642
6H
M20 X 2.5
4g6g
0.72181
0.72142
0.67917
0.67866
0.71764
0.71803
0.69795
0.69846
0.78575
0.78563
0.77256
0.77268
0.78740
0.78791
0.64472
0.64511
0.75197
0.75146
0.73228
0.73189
0.68087
0.68099
0.69858
0.69846
6H
t~
M20 X 1.5
4g6g
0.72220
0.72169
0.74425
0.74456
0.73244
0.73295
0.78614
0.78602
0.77685
0.77697
0.78740
0.78791
0.74906
0.74937
0.76835
0.76784
0.75654
0.75623
0.72346
0.72358
0.73528
0.73516
6H
~~
,a
,z
0.74780
0.74749
M20 X1
4g6g
0.76079
0.76048
0.74374
0.74323
0.75783
0.75814
0.74996
0.75047
0.78638
0.78626
0.77929
0.77941
0.78740
0.78791
0.76181
0.76212
0.77598
0.77547
0.76811
0.76780
0.74476
0.74488
0.75406
0.75394
6H
M22 X 1.5
4g6g
0.82654
0.82623
0.80094
0.80043
0.82299
0.82330
0.81118
0.81169
0.86488
0.86476
0.65559
0.85571
0.86614
0.86665
0.82780
0.82811
0.84709
0.84658
0.83528
0.83497
0.80220
0.80232
0.81402
0.81390
6H
i
M24 X 3
4g6g
0.86626
0.86587
0.81512
0.81441
0.86134
0.86173
0.83772
0.83843
0.94299
0.94287
0.92823
0.92835
0.94488
0.94559
0.86815
0.86854
0.90220
0.90149
0.87858
0.87819
0.81701
0.81713
0.83669
0.83657
6H
~
M24X 2
4g6g
0.89224
0.89193
0.85815
0.85764
0.88807
0.88838
0.87232
0.87283
0.94339
0.94327
0.93236
0.93248
0.94488
0.94539
0.89374
0.89405
0.91831
0.91780
0.90256
0.90225
0.85965
0.85977
0.87441
0.87429
6H
~
M25 X 1.5
4g6g
0.94465
0.94434
0.91906
0.91855
0.94091
0.94122
0.92909
:>.92960
0.98299
0.98287
0.97370
0.97382
0.98425
. 0.98476
0.94591
0.94622
0.96559
0.96508
0.95378
0.95347
0.92031
0.92043
0.93213
0.93201
6H
zen
2.2.
a~
::0,:..:,
.o
w£1..~
~~
_,.
:s:
\C
:.ll
~~
Gl:I:
"'"
~~
"
~
~
I
c::
z
Gl
(§)
~0
~
i:
See Notes at end of table.
Z"llC1
0
-
0
~ il
~o--
§.~G;
o·x~
o "'m
iH
~gg:
~~~
1A3tii: 07 GAGES fOR S1A.NDA.RiD 1HRtAD S!E!Ull:S CLASS!ES 4gfig AND 6lH
M PROfilE SCRJEW THREADS- UMI1S OIF SIZE {CUSTOMARY) (CONT'D)
~~
[~
~m
[
Gages for External Threads
r
X Thread Gages
X Thread Gages
~
GO
":;:
Z Plain Gages fer
Major Diam.
1.0
"'
zcno
a~~
a?r
Diam.
Minor
Diam.
Diam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Diam.
Major
Diam.
Diam.
GO
NOT GO
Class
1
2
3
4
5
6
7
3
9
10
11
12
13
14
15
M27 X 2
4g6g
1.01035
1.01004
0.97626
0.97575
1.00618
1.00649
0.99043
0.99094
1.06150
1.06138
1.05047
1.05059
1.06299
1.06350
1.01185
1.01216
1.03642
1.03591
1.02067
1.02036
0.97776
0.97788
0.99252
0.99240
6H
M30 X 3.5
4g6g
1.08953
1.08914
1.02984
1.02913
1.08433
1.08472
1.05677
1.05748
1.17902
1.17890
1.16228
1.16240
1.18110
1.18181
1.09161
1.09200
1.13020
1.12949
1.10264
1.10225
1.03193
1.03205
1.05398
1.05386
6H
M30X2
4g6g
1.12846
1.12815
1.09437
1.09386
1.12429
1.12460
1.10854
1.10905
1.17961
1.17949
1.16858
1.16870
1.18110
1.18161
1.12996
1.13027
1.15453
1.15402
1.13878
1.13847
1.09587
1.09599
1.11063
1.11051
6H
M30 X 1.5
4g6g
1.14150
1.14111
1.11591
1.11540
1.13776
1.13807
1.12594
1.12645
1.17984
1.17972
1.17055
1.17067
1.18110
1.18161
1.14276
1.14307
1.16244
1.16193
1.15063
1.15032
1.11717
1.11729
1.12898
1.12886
6H
M33 X 2
4g6g
1.24657
1.24626
1.21248
1.21197
1.24240
1.24271
1.22665
1.22716
1.29772
1.29760
1.28669
1.28681
1.29921
1.29972
1.24807
1.24838
1.27264
1.27213
1.25689
1.25658
1.21398
1.21410
1.22874
1.22862
6H
M36 X 4
4g6g
1.31268
1.31229
1.24449
1.24378
1.30717
1.30756
1.27567
1.27638
1.41496
1.41484
1.39626
1.39638
1.41732
1.41803
1.31504
1.31543
1.35835
1.35764
1.32685
1.32646
1.24685
1.24697
1.27047
1.27035
6H
M36 X 2
4g6g
1.36469
1.36436
1.33059
1.33008
1.36051
1.36082
1.34476
1.34527
1.41583
1.41571
1.40480
1.40492
1.41732
1.41783
1.36618
1.36649
1.39075
1.39024
1.37500
1.37469
1.33209
1.33221
1.34685
1.34673
6H
M39X 2
4g6g
1.48280
1.48249
1.44870
1.44819
1.47862
1.47893
1.46287
1.46338
1.53394
1.53378
1.52291
1.52307
1.53543
1.53594
1.48429
1.48460
1.50886
1.50835
1.49311
1.49280
1.45020
1.45036
1.46496
1.46480
6H
M40 X 1.5
4g6g
1.53520
1.53481
1.50961
1.50910
1.53147
1.53186
1.51965
1.52016
1.57354
1.57338
1.56425
1.56441
1.57480
1.57531
1.53646
1.53685
1.55614
1.55563
1.54433
1.54394
1.51087
1.51103
1.52268
1.52252
6H
M42 X 4.5
4g6g
1.53598
1.53547
1.45925
1.45846
1.53008
1.53059
1.49858
1.49937
1.65106
1.65090
1.63138
1.63154
1.65J54
1.65433
1.53846
1.53897
1.58630
1.58551
1.55087
1.55036
1.46177
1.46193
1.48815
1.48799
6H
Pitch
~"'
~~
'fz
Z Plain Gages for
Minor Diam.
HI
Class
~~
"""'
~ffi
GO
Nominal Size
and Pitch
.....
U1 '
o
l
Gages for Internal Threads
~~
Pitch
Pitch
Pi~d•
~a
1~
"'"'
Gl:I:
"'"
~)>
;::;;:
-<m
g"
:;;
z
-<
0
"'
i(l
~
~
~
c:
·0
z
Gl
(§)
~
0
~
~
See Note> at end of table.
&ib'
.ga g_~~.
!§.
~~~
oom
:::~
Hfg·
~g
t.S~~
~~
TABU D7 GAGES fOR STANDARD THRIEAD SlER§IES O.ASSIES 4g6g AND 6H
M PROfH.iE SCREW THRiEADS- UMHS Of Silf {CUSTOMARY) {CONT'D)
::.:>
g:~
s:•m
I
s.
Gag'.':S {or External Threads
ia
Gages for lnlernal Thteads
X Thread Gages
X Thread Gages
· l Plain Gages for
3
:;:
GO
(f)
"'0
0 ~
c:
R
'§
*
~z
r
s:
?;
Pilch
Diam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Pitch
Diam.
Major
Diam.
Pitch
Diam.
GO
NOT GO
Class
3
4
5
6
7
8
9
10
11
12
13
14
15
4g6g
1.60091
1.60052
1.56681
1.56630
1.59673
1.59712
1.58098
1.58149
1.65205
1.65189
1.64102
1.64116
1.65354
1.65405
1.60240
1.60271
1.62697
1.62646
1.61122
1.61083
1.56831
1.56847
1.58307
1.58291
6H
M45 X 1.5
4g6g
1.73205
1.73166
1.70646
1.70595
1.72831
1.72870
1.71650
1.71701
1.77039
1.77023
1.76110
1.76126
1.77165
1.77216
1.73331
1.73370
1.75299
1.75248
1.74118
1.74079
1.70772
1.70788
1.71953
1.71937
6H
M48 X 5
4g6g
1.75909
1.75858
1.67386
1.67::07
1.75280
1.75331
1.71343
1.71422
1.88697
1.88681
1.86610
1.86626
1.88976
1.89055
1.76189
1.76240
1.81445
1.81366
1.77508
1.77457
1.67665
1.67681
1.70461
1.70445
6H
M48 X2
4g6g
1.83713
1.83674
1.80303
1.80252
1.83272
1.83311
1.81697
1.81748
1.88827
1.88811
1.87724
1.87740
1.88976
1.89055
1.83862
1.83901
1.86366
1.86315
1.84791
1.84752
1.80453
1.80469
1.81929
1.81913
6H
M50 X 1.5
4g6g
1.92890
1.92851
1.90331
1.90280
1.92496
1.92535
1.91315
1.91366
1.96724
1.96708
1.95795
1.95811
1.96850
1.96901
1.93015
1.93055
1.95031
1.94980
1.93850
1.93811
1.90457
1.90473
1.91638
1.91622
6H
M55 X 1.5
4g6g
2.12574
2.12535
2.10016
2.09965
2.12181
2.12220
2.11000
2.11051
2.16409
2.16393
2.15480
2.16535
2.16586
2.12701
2.12740
2.14717
2.14665
2.13535
2.13496
2.10142
2..10158
2.11323
2.11307
6H
2~15496
Class
Pitch
Diam.
1
2
M42X 2
u;:
:I:
zm
"s:0
~
-<
Z Plain Gages for
Minor Diam.
HI
GO
Minor
Diam.
Nominal Size
and Pitch
~
0
z)>
l
Major Diam.
lO
!
M56 X 5.5
4g6g
2.06114
2.06063
1.96732
1.96653
2.05445
2.05496
2.01114
2.01193
2.20177
2.20161
2.17972
2.17988
2.20472
2.20551
2.06409
2.06460
2.12138
2.12059
2.07807
2.07756
1.97031
1.97047
1.99984
1.99968
6H
M56 X 2
4g6g
2.15209
2.15170
2.11799
2.11748
2.14768
2.14807
2.13193
2.13244
2.20323
2.20307
2.19220
2.19236
2.20472
2.20523
2.15358
2.15397
2.17862
2.17811
2.16287
2.16248
2.11949
2.11965
213425
2.13409
6H
M60 X 1.5
4g6g
2.32260
2.32221
2.29701
2.29650
2.31866
2.31905
2.30685
2.30736
2.36094
2.36078
2.35165
2.35181
2.36220
2.36271
2.32386
2.32425
2.34402
2.34351
2.33220
2.33181
2.29827
2.29843
2.31008
2.30992
6H
M64 X 6
4g6g
2.36311
2.36260
2.26083
2.25992
2.35602
2.35653
2.30878
2.30969
2.51654
2.51638
2.49291
2.49307
2.51969
2.52060
2.36626
2.36677
2.42827
2.42736
2.38102
2.38051
2.26398
2.26414
2.29547
2.29531
6H
z
g
Rl
I
~
OJ
-<
c:
0
z
Gl
illJ
z
~0
z
)>
\1:
)>
See Notes at end of table.
Z"1J()
Hi
[~~
cr
:J:::;::
~tnm
~~~
;}~~
~~~
1 A.BliE !07 GAGES FOR S! ANDARD THREAD SEIR!ES C!LASS!ES 4g6g AND 6H
M PROFU.!E SCRIEW THRIEADS-UMDTS OF SBZE (CUSTOMARY) (CONT'D}
~~
=""
[~
sm
Gages for Exiemal Threads
~
I
.
~
:i:
"'
X Thread Gages
X Thread Ga3es
Z Plain Gages for
Major Diam.
LO
GO
Gages for lntema! Threads
l
GO
Z Plain Gages for
Minor Diarn.
HI
Nominal Size
and Pitch
Class
Pitch
. l3iam.
Min<Or
Diam.
!!'itch
Diam.
Minor
Diam.
GO
NOT GO
Major
Diam.
l"itch
Diam.
Major
Oiam.
Piach
Diam.
GO
NOT GO
Class
1
2
3
4
s
6
7
8
9
10
11
12
13
14
15
M64X2
4g6g
2.46705
2.46666
2.43295
2.43244
2.46264
2.46303
2.44689
2.44740
2.51819
2.51803
2.50717
2.50733
2.51969
2.52020
2.46854
2.46893
2.49358
2.49307
2.47783
2.47744
2.43445
2.43461
2.44921
2.44905
6H
M65 X 1.5
4g6g
2.51945
2.51906
2.49386
2.49335
2.51551
2.51590
2.50370
2.50421
2.55780
2.55760
2.54850.
2.54870
2.55906
2.55957
2.52071
2.52110
2.54087
2.54036
2.52906
2.52867
2.49512
2.49492
2.50693
2.50713
GH
M70 X 1.5
4g6g
2.71630
2.71591
2.69071
2.69020
2.71236
2.71275
2)'0055
2.70106
2.75465
2.75445
2.74535
2.74555
2.75591
2.75642
2.71756
2.71795
2.73772
2.73721
2.72591
2.72552
2.69197
2.69217
2]0378
2.70358
6H
M72X6
4g6g
2.67807
2.67755
2.57579
2.57488
2.67098
2.67149
2.62374
2.62465
2.83150
2.83130
2.80787
2.80807
2.83465
2.83556
2.68122
2.68173
2.74323
2.74232
2.69598
2.69547
2.57894
2.57914
2.61043
2.61063
6H
M72 X 2
4g6g
2.78201
2.78162
2.74791
2.74740
2.77760
2.77799
2.76185
2.76236
2.83315
2.83295
2.82213
2.62233
2.83465
2.83516
2.78350
2.78389
2.80854
2.80803
2.79260
2.79241
2.74941
2.74961
2.76417
2.76397
6H
M75 X 1.5
4g6g
2.91315
2.91276
2.88756
2.88705
2.90921
2.90960
2.89740
2.89791
2.95150
2.95130
2.94220
2.94240
2.95276
2.95327
2.91441
2.91480
2.93457
2.93406
2.92276
2.92237
2.68882
2.68902
2.90063
2.90043
6H
M80 X6
4g6g
2.99303
2.99252
2.69075
2.88984
2.98594
2.98645
2.93870
2.93961
3.14646
3.14626
3.122!13
3.12303
3.14961
3.15052
2.99618
2.99669
3.05819
3.05728
3.01094
3.01043
2.89390
2.89410
2.92539
2.92519
6H
g
MBO X 2
4g6g
3.06287
3.06236
3.09256
3.09295
3.07681
3.07732
3.14811
3.14791
3.1370~
3.13729
3.14961
3.15012
3.09846
3.09885
3.12350
3.12299
3.10776
3.10737
3.06437
3.06457
3.07913
3.07893
6H
I
3.09697
3.09658
MBO X 1.5
4g6g
3.11000
3.10961
3.08441
3.08390
3.10606
3.10645
3.09425
3.09476
3.14835
3.14815
3.13906
3.139.26
3.14961
3.15012
3:11126
3.11165
3.13142
3.13091
3.11961
3.11922
3.08567
3.08587
3.09748
3.09728
6H
M85 X 2
4g6g
3.29382
3.29343
3.25972
3.25921
3.28941
3.28980
3.27366
3.27417
3.34496
3.34476
3.33394
3.33414
3.34646
3.34697
3.29531
3.29570
3.32035
3.31984
3.30461
3.30422
3.26122
3.26142
3.27598
3.27578
6H
Ztn
2.2.
u;
t-.>
Q'~
~~
~~
~~
g.:::
'l'z
t~
.,o
~~
~~
N()
Gl::t
;;::;;:
-!m
()
0
;;::
~
"'
g
z
Gl
@
~
0
See Notes at end of table.
~
!
I
Z"llO
~ ~~
~~~
o:r:s:
:~cnm
~~~
~;~
c n e
g;gg
tS:g!::!.
l!
TAB!I..E D7 GAGES FOR STANDARD THR!EAD SE!!m:s CLASSES 4g6g AND 6H
. M PROFILE SCRIEW THREADS- LIMITS OIF SIZE (CUSTOMARY) (CONT'D)
[~
~rn
[
i"
a
3
I
I
Gages for Ellfernal Threads
Gages for ~n!ernal Threads
X Thread Gages
X Thread Gages
Z Plain Gages for
Majer Diam.
:;:
"'
GO
u:
<»
Z Plain Gages for
Minor Dlam.
HI
Class
Pitch
Diam.
Minor
Diarn.
Pitch
Diam.
Minor
Diam.
GO
NOT GO
Major
Diam.
Pitch
Diam.
Maj;n
Diarn.
Pitch
!Jiam.
GO
NOT GO
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3.38673
3.38622
3.28445
3.i8354
3.37965
3.38016
3.33240
3.33331
3.54016
3.53996
3.51654
3.51674
3.54331
3.54422
3.38988
3.39039
3.45189
3.45098
3.40465
3.40414
3.28760
3.28780
3.31909
3.31889
GH
! 4g6g
I
2.~
GO
Nominal Size
a!lld Pi!tCh
MWX6
zen
tO
M90X2
4g6g
3.49067
3.49028
3.45657
3.45606
3.48626
3.48665
3.47051
3.47102
3.54181
3.54161
3.53079
3.53099
3.54331
3.54382
3.49217
3.49256
3.51720
3.51669
3.50146
3.50107
3.45807
3.45827
3.47283
3.47263
6H
M95X2
4g6g
3.68752
3.68713
3.65343
3.55292
3.68287
3.68326
3.66713
3.66764
3.73866
3.73846
3.72764
3.72784
3.74016
3.74067
3.68902
3.68941
3.71461
3.71410
3.69886
3.69847
3.65492
3.65512
3.66969
3.66949
6H
M160 X 6
4g6g
3.78043
3.77992
3.67815
3.67724
3.77295
3.77346
3.72571
3.72662
3.93386
3.93366
3.91024
3.91044
3.93701
3.93792
3.78358
3.78409
3.84657
3.84566
3.79933
3.79882
3.68130
3.68150
3.71280
3.71260
6H
M100 X 2
4g6g
3.88437
3.88398
3.85028
3.84977
3.87972
3.88011
3.86398
3.86449
3.93551
3.93531
3.92449
3.92469
3.93701
3.93752
3.88587
3.88626
3.91146
3.91095
3.89571
3.89532
3.85177
3.85197
3.86654
3.86634
6H
M10.5 X 2
4g6g
4.08122
4.08063
4.04713
4.04622
4.07657
4.07716
4.06083
4.06174
4.13236
4.13216
4.12134
4.12154
4.13386
4.13477
4.08272
4.08331
4.10831
4.10740
4.09256
4.09197
4.(14862
4.04882
4.06339
4.06319
6H
M110 X 2
4g6g
4.27807
4.27748
4.24398
4.24307
4.27343
4.27402
4.25768
4.25859
4.32921
4.32901
4.31819
4.31839
4.33071
4.33162
4.27957
4.28016
4.30516
4.30425
4.28941
4.28882
4.24547
4.24567
4.26024.
4.26004
6H
M120 X 2
4g6g
4.67177
4.67118
4.63768
4.63677
4.66713
4.66772
4.65138
4.65229
4.72291
4.72267
4.71189
4.71213
4.72441
4.72532
4.67327
4.67386
4.69886
4.69795
4.68311
4.68252
4.63917
4.63941
4.65394
4.65370
6H
M130X2
4g6g
5.06547
5.06488
5.03138
5.03047
5.06083
5.06142
5.04508
5.04599
5.11661
5.11637
5.10559
5.10583
5.11811
5.11902
5.06697
5.06756
5.09256
5.09165
5.07681
5.07622
5.03287
5.03311
5.04764
5.04740
6H
Qo
~~
~
m
m-:s
~~
\"z
~~
"'0
"'z
::!~
~~
"'"
o:z
G) :I:
-!{TI
8
;:
~
I
~
"'d
c
z
~
~0
~
~
-
: See Notes at end of table.
----
-------
L _ _ _ _ ______
------
------
&~_g
tn
O:::t~
='Wm
Q§~
o no
g_Q:;
I[~·
=' t:.10l
~o-
'"§ff
'""
S:;t:>
[~
~m
TABU: 07 GAGES fOR STANDARD THREAD SERIES C!LASSIES 4g6g AND 6H
M PROF!!.E SCREW THREADS- liMITS Of SIZE (CUSTOMARY) {CONT'D)
~
[
I
0
:;
Gages ~or External Threads
I
:E
"'
Gages for Internal Threads
X Thread Gages
X Thread Gages
LO
GO
I
Z Plain Gages for
Major Diam.
GO
Z Plain Gages for
Minor Diam.
HI
Minor
Oiam.
Pitch
Diam.
Minor
Oiam.
GO
NOT GO
Major
Diam.
Pitch
Oiam.
Major
Oiam.
Pitch
Oiam.
GO
NOT GO
Class
3
4
5
6
7
8
9
10
11
12
13
14
15
4g6g
5.45917
5.45858
5.42508
5.42417
5.45453
5.45512
5.43878
5.43969
5.51031
5.51007
5.49929'
5.49953
5.51181
5.51272
5.46067
5.46126
5.48626
5.48535
5.47051
5.46992
5.42657
5.42681
5.44134
5.44110
6H
M150 X 2
4g6g
5.85287
5.85228
5.81878
5.81787
5.84823
5.84882
5.83248
5.83339
5.90402
5.90378
5.89299
5.69323
5.90551
5.90642
5.85437
5.85496
5.87996
5.87905
5.86421
5.66362
5.82028
5.82052
5.83504
5.83480
6H
M160 X 3
4g6g
6.22059
6.22000
6.16945
6.16835
6.21508
6.21567
6.19146
6.19256
6.29732
6.29708
6.28256
6.26280
6.29921
6.30031
6.22246
6.22307
6.25791
6.25681
6.23429
6.23370
6.17134
6.17158
6.19102
6.19076
6H
M170 X 3
4g6g
6.61429
6.61370
6.56315
6.56205
6.60878
6.60937
6.58516
6.58626
6.69102
6.69070
6.67626
6.67658
6.69291
6.69401
6.61618
6.61677
6.65161
6.65051
6.62799
6.62740
6.56504
6.56536
6.58472
6.58440
6H
M180 X 3
4g6g
7.00799
7.00740
6.95685
6.95575
7.00248
7.00307
6.97886
6.97996
7.08472
7.08440
7.06996
7.07028
7.08661
7.08771
7.00988
7.01047
7.04531
7.04421
7.02169
7.02110
6.95874
6.95906
6.97843
6.97811
6H
8s:
M190 X 3
4g6g
7.40169
7.40110
7.35055
7.34945
7.39539
7.39598
7.37177
7.37287
7.47843
7.47811
7.46366
7.46398
7.48031
7.48141
7.40358
7.40417
7.44039
7.43929
7.41677
7.41618
7.35244
7.35276
7.37213
7.37181
6H
g
M200 X 3
4g6g
7.79539
7.79480
7.74425
7.74315
7.78909
7.78968
7.76547
7.76657
7.87213
7.87181
7.8573.6
7.85768
7.87402
7.87512
7.79728
7.79787
7.83409
7.83299
7.81047
7.80988
7.74614
7.74646
7.76583
7.76551
6H
zen
~~
~'§
Nominal Size
and Pitch
Class
Pitch
Diam.
1
2
M140 X 2
u;
-1>-
m.,
!!!.Q
OQ
~~
'fz
~~
,a
,z
~F!
~~
""
s:z
Q:I:
-tm
~
;
g
~
"'
g
z
Q
@
~0
~
GENERAL NOTE: All GO gages for external threads are the same as 6g sizes.
!
NOTE:
(1) M14 X 1.2~- special thread for spark plugs only. See applicable document for thread tolerance class and limiting dimensions.
z-un
Hi
[~~
Ci" :::c S:
~ ~~
~ [g
~~~
g_ g §·
3-i7:~
~o-
?J~
TAEU: D8
~~
a~
~m
SHT!NG CAGES FOR STANDARD THREAD SERiES CLASSES 4g6g AND 6H
M PROfilE SCREW THREADS- UM!TS Of S!ZIE (CUSTOMARY)
,.-------
~
W Thread-Setting Plugs
B
~
W Thread-Setting Rings
GO
a
":<
zen
£!2..
~~
::c.:-:.
ffi ~
-~~
2~
.,:::~
~g
Nominal Size
and Pitch
Fuli
Pilch
Full
Pitch
Pill:h
Minor
Class
Truncated
Form
Diam.
Truncated
form
Oiam.
Oiam.
Diam.
Pitch
Diam.
Minor
Diam.
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
M1.6 X 0.35
4g6g
0.05606
0.05575
0.06224
0.06255
0.05331
0.05319
0.05449
0.05418
0.05193
0.06224
0.05173
0.05185
...
...
. ..
. ..
...
. ..
. ..
...
...
. ..
. ..
. ..
. ..
!-?~
...
. ..
M2 X 0.4
4g6g
0.07091
0.07060
0.07799
0.07630
0.06776
0.06764
0.06925
0.06894
0.07799
0.07830
0.06610
::>.06622
...
...
M2.5 X 0.45
4g6g
0.08969
0.08938
0.09764
0.09795
0.08614
0.08602
0.08791
0.08760
0.09764
0.09795
0.08437
0.08449
. ..
...
. ..
. ..
. ..
0.10846
0.10815
0.11732
0.11763
0.10453
0.10441
0.10657
0.10626
0.11732
0.11763
0.10264
0.10276
...
...
. ..
. ..
...
. ..
. ..
. ..
....
~I
M3X05
4g6g
...
. ..
M3.5 X 0.6
4g6g
0.12634
0.12603
0.13697
0.13728
0.12161
0.12149
0.12425
0.12394
0.13697
0.-13728
0.11953
0.11965
...
. ..
...
. ..
.. .
. ..
. ..
M4X0.7
4g6g
0.14421
0.14390
0.15661
0.15692
0.13870
0.13858
0.14201
0.14170
0.15661
0.15692
0.13650
0.13662
...
...
. ..
...
. ..
...
. ..
. ..
M5 X 0.8
4g6g
0.18173
0.18142
0.19591
0.19622
0.17543
0.17531
0.17937
0.17906
0.19591
0.19622
0.173070.17319
0.17638
0.17650
0.16276
0.16245
0.18130
0.16118
0.17063
0.17032
6H
M6X1
4g6g
0.21748
0.21697
0.23520
0.23571
0.20961
0.20949
0.24307
0.24256
0.23520
0.23571
0.20681
0.20693
0.21063
0.21075
0.19358
0.19307
0.21654 .
0.21642
0.20287
0.20236
6H
M8 X 1.25
4g6g
0.29173
0.29122
0.31386
0.31437
0.28189
0.28177
0.28878
0.28627
0.31386
0.31437
0.27894
0.27906
0.28299
0.28311
0.26169
0.26116
0.28929
0.26917
0.27213
0.27162
6H
MBX 1
4g6g
0.29622
0.29571
0.31394
0.31445
0.28835
0.28823
0.29343
0.29292
0.31394
0.31445
0.28555
0.28567
0.28937
0.28949
0.27232
0.27181
0.29528
0.29516
0.28161
0.28110
6H
.,z
~»
~·
HI
Majo~ Oiam.
MajorDiam.
"'
GO
lO
~»
"'Cl
Gl:I:
...
~~
8;<
~
-<
g
~
~
"'
6
c
z
&l
~
5
~
~
--
-··
See Notes at end of table.
&~ff
~I!
~~~
Q::;:~
~cnm
;~~
~~~
~§g
cE:g~
-g~
TABU: 08 SHTilNG GAGES iFOIR STANDARD THREAD SlHWES (].. ASSES 4g6g AND 6H
M PROF! liE SCREW THREADS- UMRTS Of S~Z!E (CUSTOMARY) (CONT'D)
~,.
~>
"[~
s:~"'
~
W Thread-Setting l'iugs
r
W Thread-SeUing Rings
to
GO
~
(ll
HI
Major Diam.
Major Diam.
:;:
GO
Pitch
Pilch
Minor
Class
Truncated
full
form
Full
and Pilch
Diam.
Truncated
Form
Diam.
Diam.
Diam.
Pitch
Diam.
Mlnm
Diam.
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
M10 X 1.5
4g6g
0.36591
0.36540
0.39244
0.39295
0.35409
0.35397
0.36256
0.36205
0.39244
0.39295
0.35075
0.35087
0.35535
0.35547
0.32976
0.32925
0.36244
0.36232
0.34157
0.34106
6H
M10 X 1.25
4g6g
0.37047
0.36996
0.39260
0.39311
0.36063
0.36051
0.36752
0.36701
0.39260
0.39311
0.35768
0.35780
0.36173
0.36185
0.34043
0.33992
0.36803
0.36791
0.35087
0.35036
6H
M10 X 0.75
4g6g
0.37957
0.37926
0.39283
0.39314
0.37366
0.37354
0.37709
0.37678
0.39283
0.39314
0.37118
0.37130
0.37453
0.37465
0.36173
0.36142
0.37972
0.37960
0.36921
0.36890
6H
M12 X 1.75
4g6g
0.44012
0.43953
0.47110
0.47169
0.42634
0.42622
0.43638
0.43579
0.47110
0.47169
0.42260
0.42272
0.42768
0.42780
0.39787
0.39726
0.43555
0.43543
0.41047
0.40986
6H
M12 X 1.25
4g6g
0.44921
0.44870
0.47134
0.47185
0.43937
0.43925
0.44587
0.44536
0.47134
0.47165
0.43602
0.43614
0.44047
0.44059
0.41917
0.41666
0.44756
0.44744
0.42961
0.42910
6H
M12 X1
(Note1)
4g6g
0.45370
0.45319
0.47142
0.47193
0.44583
0.44571
0.45075
0.45024
0.47142
0.47193
0.44267
0.44299
0.44685
0.44697
0.42980
0.42929
0.45315
0.45327
0.43909
0.43856
6H
M14 X 2
4g6g
0.51429
0.51370
0.54969
0.55028
0.49854
0.49634
0.51035
0.50976
0.54969
0.55026
0.49461
0.49481
0.50004
0.50024
0.46594
0.46535
0.50839
0.50619
0.48071
0.48012
6H
g
M14 X 1.5
4g6g
0.54992
0.55043
0.51157
0.51141
0.51984
0.51933
0.54992
0.55043
0.50603
0.50819
0.51283
0.51299
0.48724
0.48673
0.52031
0.52015
0.49906
0.49855
6H
I
0.52339
0.52286
M15 X 1
4g6g
0.57181
0.57130
0.58953
0.59004
0.56394
0.56378
0.56886
0.56835
0.58953
0.59004
0.56098.
0.56114
0.56496
0.56512
0.54791
0.54740
0.57126
0.57110
0.55720
0.55669
6H
M16 X2
4g6g
0.59303
0.59244
'0.62843
0.62902
0.57728
0.57708
0.58909
0.58850
0.62843
0.62902
0.57335
0.57355
0.57878
0.57898
0.54469
0.54410
0.58713
0.58693
0.55945
0.55886
6H
Nominal Sia:e
~~Q
QS:
u;
0\
:t!,:.:,
~:!
£!..1$
~~
~.:::
~~
;:;::!
..,a
..,z
~)>
~·
~~
"-'n
Q:I:
.:z
-<m
8;;:
~
z
-<
Pitch
~
g
ill
(§)
~
g
~
)>
-
See Notes at end of table.
'----··
-en
~.~
ffi-tB·
~""
~j;
:E~
"'m
H
~.
TABlE 03 SETTING GAGES FOR STANDARD THREAD SIERiiES ClASSES 4g6g AND 6H
M PROlFIU SCRE\rV THREADS -ILlMDTS Of SIIZiE (CUSTOMARY) (CONl'D)
5'
l;
s:
m
W Thread-Setting Rings
W Thread-Setting Plugs
I
I
GO
HI
I
Major Diam.
Major Diam.
GO
LO
Full
Truncated
Form
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Oiam.
Class
Nominal Size
and Pitch
Class
Truncated
Form
Pitch
Diam.
1
2
3
4
5
6
7
8
9
10
11
12
13
M16 X 1.5
4g6g
0.60213
0.60162
0.62866
0.62917
0.59031
0.59015
0.59858
0.59807
0.62866
0.62917
0.58677
0.58693
0.59157
0.59173
0.55598
0.56547
0.59906
0.59890
0.57780
0.57729
5H
M17 X 1
4g6g
0.65055
0.65004
0.66827
0.66878
0.64268
0.64252
0.64760
0.64709
0.66827
0.66878
0.63972
0.63988
0.64370
0.64386
0.62665
0.62614
0.65000
0.64984
0.63594
0.63543
6H
M18 X 1.5
4g6g
0.68067
0.68036
0.70740
0.70791
0.66906
0.66890
0.67732
0.67681
0.70740
0.70791
0.66551
0.66567
0.67031
0.67047
0.64472
0.64421
0.67780
0.67764
0.65654
0.65603
6H
M20 X 2.5
4g6g
0.74150
0.74091
0.78575
0.78634
0.72181
0.72161
0.73732
0.73673
0.78575
0.78634
0.71764
0.71784
0.64472
0.64492
0.68087
0.68028
0.73228
0.73208
0.69858
0.69799
6H
M20 X 1.5
4g6g
0.75961
0.75910
0.78615
0.78666
0.74780
0.74764
0.75606
0.75555
0.78615
0.78666
0.74425
0.74441
0.74906
0.74922
0.72346
0.72295
0.75654
0.75638
0.73528
0.73477
6H
s:
M20 X 1
4g6g
0.76666
0.76815
0.76638
0.76689
0.76079
0.76063
0.76571
0.76520
0.78638
0.78689
0.75783
0.75799
0.76181
0.76213
0.74476
0.74425
0.76811
0.71>795
0.75406
0.75355
6H
"z
m
"s:
M22 X 1.5
4g6g
0.83835
0.83784
0.86488
0.66539
0.82654
0.82638
0.83480
0.63425
0.86488
0.86539
0.82299
0.82315
0.82780
0.82796
0.80220
0.80169
0.83528
0.83512
0.81402
0.81351
6H
M24X3
4g6g
0.88988
0.88929
0.94299
0.94356
0.86626
0.86606
0.88496
0.88437
0.94299
0.94358
0.86134
0.86154
0.86615
0.86835
0.81701
0.81642
0.87658
0.87838
0.63669
0.83610
6H
M24X2
4g6g
0.90799
0.90740
0.94339
0.94396
0.89224
0.89204
0.90382
0.90323
0.94339
0.94396
0.88807
0.86827
0.89374
0.89394
0.85965
0.85906
0.90256
0.90236
0.87441
0.87382
6H
4g6g
0.95646
0.95595
0.98299
0.98350
0.94465
0.94449
0.95272
0.95221
0.98299
0.96350
0.94091
0.94107
0.94591
0.94607
0.92031
0.91980
0.95378
0.95362
0.93213
0.93162
6H
rnu
~§-
!=[""
'a
Full
;:;;
-..J
;;;
~
,:,:
z
:;
5
,.
z
r
>
:I:
0
:1:
z
--
-<
g
~
~
"'-<0
c
z
Gl
@
M25 X 1.5
z
:;
5
z
f!
~
---
-
See Notes at end of table.
L _ _ _ _ _ _ _. _
-
------ ~
Z"tlO
c
ao
~~l
g.~;
~:r~
:::~oom
Q § ~
~~3
·--.··· .. ·.. -.· ... ' ' "
~~~
~~~
... ..
TABU 08 SiEIT!NG GAC~S FOP. STANDARD THR!EAD SiER!ES CiASS§:S 4g6g AND 6H
M PROFilE SCRIEW THREADS- UMITS Of S!Z!E {CUSTOMARY) (CONT'D}
""
[;
[~
;;_m
W Thread-Selling Rings
W Thread-Setting Plugs
i
~-
GO
a3
GO
LO
HI
Major Diam.
Major Diam.
:E
"
Nominal Size
and Pitch
Class
Truncated
Full
Form
Piich
Diam.
Truncated
form
Pitch
Diam.
Pilch
Diam.
Minor
Diam.
Pilch
Diam.
Minor
Diam.
1
2
3
4
5
6
7
8
9
10
11
12
M27 X 2
4g6g
1.02610
1.02551
1.06150
1.06209
1.01035
1.01015
1.02193
1.02134
1.06150
1.06209
1.00618
1.00638
1.01165
1.01205
0.97776
0.97717
1.02067
1.02047
0.99252
0.99193
1.11709
1.11638
1.17902
1.17973
1.08953
1.08933
1.11189
1.11118
1.17902
1.17973
1.08433
1.08453
1.09161
1.09181
1.03193
1.03122
1.10264
1.10244
1.05398
1.05327
M30 X 3.5
4g6g
M30 X 2
4g6g
1.14421
1.14362
1.17961
1.16020
1.12846
1.12826
1.14004
1.13945
1.17961
1.18020
1.12429
1.12449
1.12996
1.13016
1.09587
1.09528
1.13878
1.13856
1.11063
1.11004
M30 X 1.5
4g6g
1.15331
1.15280
1.17984
1.18035
1.14150
1.14134
1.14957
1.14906
1.17964
1.16035
1.13776
1.13792
1.14276
1.14292
1.11716
1.11665
1.15063
1.15047
1.12898
1.12847
1.26232
1.26173
1.29772
1.29823
1.24647
1.24627
1.25815
1.25756
1.29772
1.29823
1.24240
1.24260
1.24807
1.24827
1.21398
1.21339
1.25689
1.25669
1.22874
1.22815
o;
zcnn
=~
Qo
Full
00
:;v,:....:.
m~
~~
0"'
~~
.,z
~)>
:....•
4g6g
Gl:I:
"'"
g
I
6H
I
6H
I
1.41496
1.41567
1.30717
1.30737
1.31504
1.31524
1.24685
1.24614
1.32685
1.32665
1.27047
1.26976
6H
M36 X 2
4g6g
1.38043
1.37984
1.41583
1.41642
1.36469
1.36449
1.37626
1.37567
1.41583
1.41642
1.36051
1.36071
1.36618
1.31i638
1.33209
1.33150
1.37500
1.37480
1.34685
1.34626
6H
M39 X2
4g6g
1.49854
1.49795
1.53394
1.53453
1.46280
1.48260
1.49437
1.49378
1.53394
1.53453
1.47862
1.47682
1.48429
1.48449
1.45020
1.44961
1.49311
1.49291
1.46496
1.46437
I
1.54701
1.54650
1.57354
1.57405
1.53520
1.53500
1.54327
1.54276
1.57354
1.57405
1.53147 .
1.53167
1.53646
1.53666
1.51067
1.51036
1.54433
1.54413
1.52268
1.52217
~
M42 X 4.5
4g6g
1.57142
1.57063
1.65106
1.65185
1.53598
1.53574
1.56551
1.56472
1.65106
1.65185
1.53008
1.53032
1.53846
1.53870
1.46177
1.46098
1.55087
1.55063
1.48615
1.48736
6H
I
I
6H
I
I
Gl
(jj)
z
)>
I
133866
133795
4g6g
~s:
6H
1.31268
1.31248
M40 X 1.5
g
I
1.41496
1.41567
I
c
z
6H
I
1.34417
1.34346
0
~
I
I
4g6g
s:
~
~
6H
I
M36 X 4
~~
~~
13
I
I
M33X2
,z
"'-
~~
.,a
Class
- · -
See Notes at end of table.
- - -
--
-------- ~
---
- -
~
GH
-
--
tn
Z'"OO
o a o
o·:::t:s:
:lWm
;~~
i~~
~~~
""
~;
TABlE 08 SETTING GAGES fOR STANDARD THREAD SEiR&ES Cl..ASSIES 4g6g AND 6H
M PROfilE SCREW THREADS -ILIM!TS Of sm: (CUSTOMARY} {CONT'D)
[~
~m
f
W Thread-Seiling Plugs
r
I
GO
~
:;:
Major Diarn.
"'
W Thread-Setting Rings
tO
HI
GO
Major Diam.
-~-----------
Nominal Size
and Pitch
Class
Truncated
Full
Form
Pitch
Diam.
Truncated
Full
Form
Pitch
Oiam.
Pilch
Diam.
Minor
Diam.
Pilch
Diam.
Minor
Diam.
Class
1
2
3
4
5
6
7
a
9
10
11
12
13
M42 X 2
4g6g
1.61665
1.61606
1.65205
1.65264
1.60091
1.60067
1.61248
1.61189
1.65205
1.65264
1.59673
1.59697
1.60240
1.60264
1.56831
1.56772
1.61122
1.61098
1.58307
1.58248
6H
M45 X 1.5
4g6g
1.74386
1.74335
1.77039
1.77090
1.73205
1.73185
1.74012
1.73961
1.77039
1.77090
1.72831
1.72851
1.73331
1.73351
1.70772
1.70721
1.74118
1.74098
1.71953
1.71902
6H
M48 X 5
4g6g
1.79846
1.79767
1.88697
1.88776
1.75909
1.75885
1.79217
1.79138
1.88697
1.88776
1.75280
1.75304
1.76189
1.76213
1.67665
1.67586
1.77508
1.77484
1.70461
1.70382
6H
M48 X 2
4g6g
1.85287
1.85228
1.88827
1.88886
1.83713
1.83689
1.84846
1.84787
1.88827
1.88886
1.83272
1.83296
1.83862
1.83886
1.80453
1.80394
1.84791
1.84767
1.81929
1.81870
6H
M50 X 1.5
4g6g
1.94071
1.94020
1.96724
1.96775
1.92890
1.92870
1.93677
1.93626
1.96724
1.96775
1.92496
1.92516
1.93016
1.93036
1.90457
1.90406
1.93850
1.93830
1.91638
1.91587
6H
M55 X 1.5
4g6g
2.13756
2.13705
2.16409
2.16460
2.12574
2.12554
2.13362
2.13311
2.16409
2.16460
2.12181
212201
2.12701
2.12721
2.10142
2.10091
2.13535
2.13515
2.11323
2.11272
6H
M56 X 5.5
4g6g
2.10441
2.10362
2.20177
2.20256
2.06114
2.06090
2.09776
2.09697
2.20177
2.20256
2.05;145
2.05469
2.06409
2.06433
1.97031
1.96952
2.07807
2.07783
1.99984
1.99905
6H
M56 X 2
4g6g
2.16783
2.16724
2.20323
2.20382
2.15209
2.15185
2.16343
2.16284
2.20323
2.20382
2.14768
2.14788
2.15358
2.15382
2.11949
2.11890
2.16287
2.16263
2.13425
2.13366
6H
J
M60 X 1.5
4g6g
2.33441
2.33390
2.36094
2.36145
2.32260
2.32240
2.33047
2.32996
2.36094
2.36145
2.31866
2.31886
2.32386
2.32406
2.29827
2.29776
2.33220
2.33200
2.31008
2.30957
6H
z
M64X 6
4g6g
2.41035
2.40944
2.51654
2.51745
2.36311
2.36287
2.40327
2.40236
2.51654
2.51745
2.35602
2.35626
2.36626
2.36650
2.26398
2.26307
2.38102
2.36078
2.29547
2.29456
6H
zmo
~!§., ~
~~
m <0
t...r.
\0
"""'
~g
~~
\"z
~~
.-,o
~~
:..,.r~$
">()
Gl;!;
S:z
-<m
0
0
;:
~
~
0
ill
Ill
~
Gl
@
~
0
~
~
See Notes at end of table.
Z""CC"l
o ao
as.~
ag:t§:
~~~
o:z:s:::
:::.:earn
;[~
~~~
.~g.g:
g:g~
TAB!..iE DB SHT!NG GAGES IFOiR SiTANDARD TH!U:AD SERIES C!..ASSIES 4gtig Ai-.iD 6fl-!
M ~ROFR!E SCREW lHRIEADS -UMHS OF SIZE (CUSTOMARY) {CONT'D}
~~
;:;>
moo
o.s:
------
I
:;m
i
W Thread-Seiling Plugs
f
GO
~
lO
"'
~~
Qo
GO
HI
Major Oiam.
M;;jcr Oiam.
:;:
I
Pitch
Diam.
Truncated
full
!Form
Pitch
Diam.
!'itch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diam.
Class
4
5
6
7
3
9
10
11
12
13
2.48280
2.48221
2.51819
2.51878
2.46705
2.46681
2.47839
2.47780
2.51819
2.51878
2.46264
2.45288
2.45854
2.46878
2.43445
2.43386
2.47783
2.47759
2.44921
2.44862
6H
4g6g
2.53126
2.53075
2.55780
2.55831
2.51945
2.51925
2.52732
2.52681
2.55780
2.55831
2.51551
2.51571
2.52071
2.52091
2.49512
2.49461
2.52906
2.52886
2.50693
2.50642
6H
M70 X 1.5
4g6g
2.72811
2.72760
2.75465
2.75516
2.71630
2.71610
2.72417
2.72366
2.75465
2.75516
2.71236
2.71256
2.71756
2.71776
2.69197
2.69146
2.73772
2.73752
2.70378
2.70327
6H
M72 X6
4g6g
2.72531
2.72440
2.83150
2.83241
2.67807
2.67783
2.71823
2.71732
2.83150
2.83241
2.67098
2.67122
2.68122
2.63146
2.57894
2.57803
2.69598
2.69574
2.61043
2.60952
6H
M72 X2
4g6g
2.79776
2.79717
2.83315
2.83374
2.78201
2.78177
2.79335
2.79276
2.83315
2.83374
2.77760
2.77784
2.78350
2.78374
2.74941
2.74882
2.79280
2.79256
2.76417
2.76358
6H
M75 X 1.5
4g6g
2.92496
2.92445
2.95150
2.95201
2.91315
2.91295
2.92102
2.92051
2.95150
2.95201
2.90921
2.90941
2.91441
2.91461
2.88882
2.88831
2.92276
2.92256
2.90063
2.90012
6H
M80 X6
4g6g
3.04028
3.03937
3.14646
3.14737
2.99303
2.99279
3.03319
3.03228
3.14646
3.14737
2.98594
2.98618
2.99618
2.99642
2.89390
2.89299
3.01094
3.01070
2.92539
2.92448
6H
M80 X 2
4g6g
3.11272
3.11213
3.14811
3.14870
3.09697
3.09673
3.10831
3.10772
3.14811
3.14870
3.09256
3.09280
3.09846
3.09870
3.06437
3.06378
3.10776
3.10752
3.07913
3.07854
6H
M80 X 1.5
4g6g
3.12181
3.12130
3.14835
3.14886
3.11000
3.10980
3.11787
3.11736
3.14835
3.14886
3.10606.
3.10626
3.11126
3.11146
3.08567
3.08516
3.11961
3.11941
3.09748
3.09697
6H
M85X2
4g6g
3.30957
3.30898
3.34496
3.34555
3.29382
3.29358
3.30516
3.30457
3.34496
3.34555
3.28941
3.28965
3.29531
3.29555
3.26122
3.26063
3.30461
3.30437
3.27598
3.27539
6H
Nominal Size
and Pitch
Class
Truncated
form
1
2
3
M64 X 2
4g6g
M65 X 1.5
full
§
;:o.:..:.
•
W Thread-Setting Rings
0
.~
~~
~~
"'.!..~
;G=!
,o
,z
~>
:.;.r
~~
"'"
G)J:
~~
8
:g
s:
z
-<
0
~
~
g
~
21
0
c
z
G)
{§)
z
::.;
a
~
I
See Notes at end of table.
- - - · - ----
L _ _ __ _
z,o
o
ao
ttl
a~l;
cr
J: ~
~ cnm
iH
g_gg:
:1
t5 ~ ~
~-:I
~~
1;
l ABLE 08 SEITlNG GAGES IF OR SlANDAiRD THREAD SERIES ClASSES 4g6g AND 6H
M PROF! i.E SCREW THREADS- liMITS OF SHZE (CUSTOMARY) (CONT'D)
g:~
~m
i
W Thread-Setting Plugs
~
W Tluead-Setting Rings
~
~
GO
GO
lO
HI
:;:
"'
Major Diam.
Major Diam.
S:&'
~~
::0,.:.:,
g~
~~
o"'
,.z
Full
Nominal Size
and Piich
Class
Truncated
Full
form
Pitch
Diam.
Truncated
Form
Pitch
Diam.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Miner
Diam.
Class
1
2
3
4
5
6
7
8
9
10
11
12
13
M90 X5
4g6g
3.43398
3.43307
3.54016
3.54107
3.38673
3.38645
3.42689
3.42598
3.54016
3.54107
3.37965
3.37989
3.38988
3.39012
3.28760
3.28669
3.40465
3.40441
3.31909
3.31818
6H
M90 X2
4g6g
3.50642
3.50583
3.54181
3.54240
3.49067
3.49043
3.50201
3.50142
3.54181
3.54240
3.48626
3.48650
3.49217
3.49241
3.45807
3.45746
3.47283
3.47224
6H
3.50122
I 3.50146
M95 X 2
4g6g
3.70327
3.70268
3.73866
3.73925
3.68752
3.66726
3.69862
3.69803
3.73866
3.73925
3.68287
3.68311
3.68902
3.68926
3.65492
3.65433
3.69886
3.69862
3.66969
3.66910
6H
M100 X 6
4g6g
3.82766
3.62677
3.93386
3.93477
3.78043
3.76019
3.62020
3.81929
3.93366
3.93477
3.77295
3.77319
3.78356
3.78382
3.66130
3.68039
3.79933
3.79909
3.71280
3.71189
6H
M100 X 2
4g6g
3.90012
3.89953
3.93551
3.93610
3.88437
3.88413
3.69547
3.89488
3.93551
3.93610
3.67972
3.88003
3.88567
3.88611
3.65177
3.85118
3.89571
2.89547
3.86654
3.86595
6H
M105 X 2
4g6g
4.09697
4.09606
4.13236
4.13327
4.08122
4.08091
4.09232
4.09141
4.13236
4.13327
4.07657
4.07688
4.08272
4.08303
4.04862
4.04771
4.09256
4.09225
4.06339
4.06248
6H
M110 X 2
4g6g
4.29382
4.29291
4.32921
4.33012
4.27607
4.27776
4.26917
4.28826
4.32921
4.33012
4.27343
4.27374
4.27957
4.27968
4.24547
4.24455
4.28941
4.28911
4.26024
4.25933
6H
M120 X 2
4g6g
4.68752
4.68661
4.72291
4.72382
4.67177
4.67146
4.68287
4.68196
4.72291
4.72382
4.66713
4.66744
4.67327
4.67358
4.63917
4.63826
4.68311
4.68280
4.65394
4.65303
6H
M130 X 2
4g6g
5.08122
5.08031
5._11661
5.11752
5.06547
5.06516
5.07657
5.07566
5.11661
5.11752
5.06083
5.06114
5.06697
5.06728
5.03287
5.03196
5.07681
5.07650
5.04764
5.04673
6H
a,
c;).!:
;c;
.,o
.,z
->
:.;.•
~~
""
G) :I:
~ffi
"0
"'~
-<
1
~
"'
C§
c::
z
Gl
~
~
0
~
See Notes at end of table.
Z"tl(')
o
ao
~ 2:~­
i~~
o:r~
""'m
;~a
~~[
~~i
~~
~;
[~
g_m
SETTING GAGES fOR ST ANOARD THREAD SERRES CILASSES 4g6g AND 6H
M PROFILIE SCREW THREADS- UMffS Of SIZE (CUSTOMARY} (CONT'D)
TABlE 03
!
2
~
W Thread-Setting Plugs
a
W Thread-Setting Rings
3
:;:
GO
"'
Major Diam.
Nominal Size
and Pitch
~~
m
~I
i
I
Major Diam.
!Form
!'itch
Diam.
Truncated
Form
Pitch
!Diam.
Pitch
Diam.
Minor
Diam.
Pitch
Diam.
Minor
Diarn.
Class
Full
full
2
3
4
5
6
7
3
9
10
11
12
13
I
4g6g
5.47492
5.47401
5.51031
5.51122
5.45917
5.45886
5.47028
5.46937
5.51031
5.51122
5.45453
5.45484
5.46067
5.46098
5.42657
5.42566
5.47051
5.47020
5.44134
5.44043
6H
M150 X 2
4g6g
5.86862
5.86771
5.90402
5.90493
5.85287
5.85256
5.86398
5.86307
5.90402
5.90493
5.84823
5.84854
5.85437
5.85468
5.82028
5.81937
5.86421
5.86390
5.83504
5.83413
6H
M160 >< 3
4g6g
6.24421
6.24330
6.29732
6.29823
6.22059
6.22028
6.23870
6.23779
6.29732
6.29823
6.21508
6.21539
6.22248
6.22279
6.17134
6.17043
6.23429
6.23398
6.19102
6.19011
6H
M170 X 3
4g6g
6.63791
6.63700
6.69102
6.69193
6.61429
6.61398
6.63240
6.63149
6.69102
6.69193
6.60878
6.60909
6.61618
6.61649
6.56504
6.56413
6.62799
6.62768
6.58472
6.58381
6H
M180 X 3
4g6g
7.03161
7.03070
7.08472
7.08563
7.00799
7.00768
7.02610
7.02519
7.08472
7.08563
7.00248
7.00279
7.00988
7.01019
6.95874
6.95783
7.02169
7.02138
6.97843
6.97752
6H
M190 >< 3
4g6g
7.42531
7.42440
7.47843
7.47934
7.40169
7.40138
7.41902
7.41811
7.47843
7.47934
7.39539
7.39570
7.40358
7.40389
7.35244
7.35153
7.41677
7.41646
7.37213
7.37122
6H
M200 X 3
4g6g
7.81902
7.81811
7.87213
7.87304
7.79539
7.79508
7.81272
7.81181
7.87213
7.87304
7.78909
7.78940
7.79728
7.79759
7.74614
7.74523
7.81047
7.81016
7.76583
7.76492
6H
M140 X 2
a.~
Truncated
HI
I
1
zen
j Class
GO
LO
~
F~
~~
'fz
~~
~a
~~
~·
"'"'
Gl;!;
:..ll>o
~n
;::z
-<m
8
~-<
;::
0
Rl
;
~
GENERAL NOTE: All GO plug setting gages are the same as 6g sizes.
~z
NOTE:
(1) M 14 x 1.25- special thread for spark plugs only. See applicable document for thread tolerance class and limiting dimensions.
Gl
@
~
0
~
>
RJENGTHS OF TAPERLOCK AND TI!UD...OCK THREAD PLUG GAGE BLANKS SELECTED
TABU 09
FROM ANSI/ASME B47.1aM (CUSTOMARY)
Thread Sizes
Thread Lengths
Fine Pitch lnstrument Thread
Plug Gages
Thread Plug Gages
Above
To And
Including
GO
HI
GO
HI
1
2
3
4
5
6
rnm
rnrn
in.
in.
in.
in.
1.50
2.67
3.81
5.84
9.27
12.95
20.96
2.67
3.8"1
5.84
9.27
12.95
1/4
5/16
13/32
1/2
7/11
1
3/16
7/32
9/32
5/16
3/8
1/2
5/8
1/8
5/32
20.96
3/16
7/32
9/32
5/16
3/8
112
5/8
1/4
5/16
3/8
7/16
314
314
1/2
7/B
7/8
1
1
1
'1
3/4
3/4
5/B
5/8
--
28.83
-
211.113
38.35
5 '1.05
63.75
76.45
89.15
203.45
3/4
~·-
7132
-
--
38.35
51.05
63.75
76.45
69.15
203.45
305.05
Pitches 2.0 mm
And smaller
1
Pitches Larger
than 2.0 mm
1 1/4
Pitches 3.5 mm
and larger
Pitches
belween
3.5 and 1.5 mm
Pitches
1.5 mm and
Smaller
1-7/8
2
2
2
2-1/6
2-1/4
1-1/4
1-3/8
1-1/2
1-1/2
1-1/2
1-1/2
7/8
7/B
1
1
1
1
.. .
...
...
...
...
. ..
. ..
. ..
GENERAl. NOTE:
For lrilock plug blanks above 19.3 mrn and including 38.35 mm, and wire type plug blanks in sizes pelow 25.65 mm, see ANSI/ASME
B47.1aM.
163
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LENGTHS Of THREAD RING GAGE BLANKS AND TOTAL THREAD LENGTHS OF
STAf'>JDARD TRUNCATED SETTING PLUG GAGE BLANKS
SEUCTIED FROM ANSI/ASME 847.1aM (CUSTOMARY)
TAI!ltlE Dl'IO
Thr'llad §ix<es
Total Thread Lengths of Truncated
Thread Setting Plugs
Lengths of Thread Ring Gageli
Above
To And
lndwtling
Thin
Ring
Thick
Ring
Fine Pitch
Instrument
Ring
For
Thin Ring
For
Thick Ring
For
Fine Pilch
Instrument Ring
1
2
3
4
5
6
7
8
mm
mm
in.
in.
in.
in.
in.
in.
1.50
2.29
3.81
9.84
9.27
3.81
5.84
9.27
12.95
3/32
5/32
3/16
11/32
7/'16
7/32
2.29
12.95
20.96
28.03
30.35
5'1.05
20.96
28.83
38.35
51.05
63.75
9/16
11/16
3/4
13/16
7/B
63.75
76.45
89.15
101.85
76.45
89.'15
10'1.85
159.00
718
15/16
15/16
1
. ..
.. .
. ..
316
13132
.. .
...
...
...
...
...
1/4
5/16
3/4
1
...
...
9/16
11/16
3/4
15/16
1-1/8
1-1/4
1-5/16
15/32
17/32
5/8
SIB
1-1/4
1-112
1-5/8
1-7/8
11/16
2
1-7/8
2-1/8
2-3/8
2-7/8
3
1
1-1/8
1-5/16
1-5/16
1-7/16
1-3/8
1-7/16
...
...
2
2
2
2-1/8
3-1/8
3-1/8
3-1/4
3-1/4
...
...
. ..
...
.. .
. ..
.. .
...
...
H/2
1-1/2
...
.. .
GENERAL NOTES:
(a) Thin gage blanks are used for all LO thread ring gages, recessing sides as applicaole.
(b) for GO thread ring gages:
('I) 0.0 mm to 5.84 mm, use thin blanks For all pitches, recessing sides as applicable;
(2) above 5.84 mm to 12.95 mrn, use thin blanks for pitches 0.75 mm and larger; fine pitch instrument blanks for pitches finer than
0.75 mm;
(3) above 12.95 mm to 28.83 mm, use thick blanks for pitches larger than 2 mm, thin blanks for pitches 1 mm to 2 mm, and fine pitch
instrument blanks for pitches finer than 1 mm;
(4) above 20.63 mm to 152.65 mm, use thick blanks for pitches larger than 2.5 mm, thin blanks for pitches 1 mm to 2 mm, and fine
pitch instrument blanks for pitches finer than 1 mm;
(5) above 152.65 mm, use thick blanks for all pitches.
164
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AMERICAN NATIONAL STANDARDS FOR SCREW THREADS
(Published by The American Society of Mechanical Engineers!
TITLE OF STANDARD
Unified Inch Screw Threads (UN and UNR Thread Form) ................................ 81.1-1982
Gages and Gaging for Unified Inch Screw Threads .................................... , . 81.2-1983
Sccew Thread Gaging Systems for Dimensional Acceptability ............................ 81.3-1979
Screw Thread Gaging Systems for Dimensional
Acceptability {Metric Screw Threads M and MJ) .................................... B1.3M-1981
Acme Screw Threads ................................................................. B 1 . 5-1977
Nomenclature, Definitions, and Letter Symbols for Screw Thfeads . . . . . . . . . . . . . . . . . . . . . B 1 . 7M-1984
Stub Acme Screw Threads ........................................................... B 1.8-1977
Buttress Inch Screw Threads 7°/45° Form With 0.6 Pitch Basic Height of
Thread Engagement ........................................................ B1.9-1973(R1979)
Unified Miniature Screw Threads _......... _. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B 1 .1 0-1958
Microscopic Objective Thread .............................................. : . B 1. 11-1958(R 1978)
Class 5 Interface-Fit Thread . , ................ _. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B 1. 12-1 97 2
Metric Screw Thresds - M ·Pro fife ..... ·............................................ B 1. 13M-1983
Gages and Gaging for Metric M Scre.w-Threads ..................................... B1.16M-1984
Metric Screw Threads tor Commercial .Me6himieal
Fasteners - Boundary Profile Defined ............................... , ............ B 1 . 18M-_1982
Pipe Threads, General Purpose (Inch) ............................................... B 1.20.1-1983
Dryseal Pipe Threads (Inch) ................................... , ............ B1.20.3-1976(R1982)
Dryseal Pipe Threads (Metric Translation of 81.20.3-1976) .................. B1.20.4-1976{R1982)
Gaging for Dryseal Pipe Threads (Inch) ............................................. 81.20.5-1978
Gaging for Dryseal Pipe Threads {Metric Translation
of 81.20.5-1978) ............................................................. B1.20.6M-1984
Hose Coupling Screw Threads ............................................. B 1 .20. 7 -1966(R1983)
Metric Screw Threads - MJ Profile ............................... , ................ B 1 .21 M-1978
Gages and Gaging Practice for "MJ" Series Metric Screw Threads . . . . . . . . . . . . . . . . . . . . B 1.22-1978
The ASME Publications Catalog shows a complete list of all the Standards published by the Society.
The catalog and binders for holding these Standards are available upon request.
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lntentionaUy left blank
Copyright ASME ln!P.rnational
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