ASMEIANSI B18.2.2-1 987
REAFFIRMED 1993
FOR CURRENT COMMITIEE PERSONNEL
PLEASE SEE ASME MANUAL AS-1 1
SPONSOREDANDPUBLISHEDBY
T H EA M E R I C A NS O C I - E T Y
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Square and Hex Nuts
(Inch Series)
Date of Issuance: August 15,1987
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 thisedition.
This code or standard was developed under procedures accredited as meeting
the criteria for
American National Standards. The Consensus Committeethat approved the code or standard was
balancedto assure that individualsfrom competent and concerned interests have had an opportunity
to participate. The proposed code
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Copyright @ 1987 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All Rights Reserved
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0759b70 Ob119707 2 1 5
S T D * A S M E B18.2-2-ENGL L987
m
FOREWORD
American National Standards CommitteeB18 for the standardization of bolts, screws,
nuts, rivets, and similar fasteners was organized in March 1922 as Sectional Committee
BI 8 under the aegis of the American Engineering Standards Committee(later the American
Standards Association, then the United States of America Standards Institute and, as of
October 6,1969, the American National Standards Institute,
Inc.) with the Society ofAutomotive Engineers and the American Society of Mechanical Engineers as joint sponsors.
Subcommittee 2 was subsequently established and charged with the responsibility for technical content of standards covering wrench head bolts and nuts.
Subcommittee 2, after appraisalof the requirements of industry, developed a proposed
standard series of bolt head and nut dimensions. This proposal was finally approved and
designated a Tentative American Standard in February 1927.
A first revision of the document was designated as an American Standard in March 1933
and was followed by a second revision which was granted approval as an American Standard in January 1941.
Following reorganization of the B18 Committee in 1947, Subcommittee 2 was asked to
expand the standard on head proportions into a complete product standard. A proposal
covering square andhexagon head bolts and nuts,hexagon head cap screws, and automotive hexagon headbolts was prepared and submitted to the B18 Committee in April 1950.
While this draft was under consideration, theB18 Committee received a proposal fromthe
British Standards Institution for Unification of dimensions on products incorporating unified screw threads. The Committee welcomed the opportunity of discussing the proposals
and an American-British-Canadian Conference was held in New York on June 1 and 2,
1950.
It was agreed in the conference that theessentials of unification could be accomplished by
selection of mutually satisfactory across-the-flats dimensions, since this would permit the
use of the same wrenches and because other featureswould rarely affect interchangeability.
After due consideration, suitable existing across-the-flats dimensions were selectedfor the
hexagon products affected.
In its meetingof October 13,1950, Subcommittee 2 agreed to incorporate in the proposed
standard the conference recommendations on y4 in. hexagon head bolts, 78 in. hexagon
head cap screws and automotive hexagon head bolts, YI6 in. andy8 in. regular hexagon and
square nuts, and 1/16 in. light and regular hexagon and squarenuts. At a subsequent meeting
of Subcommittee2, further changes were adopted in order to combine the light and regular
series ofnuts, and to combine the automotive hexagon head bolt, hexagon head cap screw,
and regular hexagon head close tolerance bolt.
In view of the prógress made in the United States and the urgency of standardization for
mutual defense, the British Standards Institution sponsored a second Conference in London in April 1951 to complete the unification of certain hexagon bolts and nuts.
At a meeting on June 8, 1951,Subcommittee 2 reaffirmed its acceptance of the unified dimensions whichcorrespond with those in theMarch 1951 draft, but attemptedto select better nomenclature for the unified products. A final draft incorporating the nomenclature
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“Finished Hexagon Bolts and Nuts” andcontaining numerous editorial changes was submitted for letter ballot in September 1951. Following approval by the B18 committee and
the sponsors, the proposal was presented to the American Standards Association for approval and designation as an American Standard. This was granted on March 24, 1952.
It being recognizedthat the standard was in need of additional refinements, Subcommittee 2 began workimmediately to eliminate these shortcomings. A proposed revision removing inconsistencies with respect
to fillets, improving the length tolerances on heavy hexagon
bolts, and incorporating numerous other corrections and clarifications of an editorial nature, resulted. The most noteworthy editorial change was a decision to combine the coverage
for hexagon cap screws and square head set screwsfrom the B18.2 standard with the coverage for slotted head cap screws and slotted headless set screwsfrom theB18.6 standard for
publication in a separate document. Therequirements for the unified hexagon cap screws
and finished hexagon bolts being identical in the overlapping sizes, the datawould now be
available in two publications. Following approvals by the B18 Committee and sponsor organizations, the proposal was submitted to theAmerican Standards Association and declared an American Standard on February 2, 1955.
A revision of this document comprised of numerous editorial corrections andinclusion
of an appendix for grade markings was duly approved and designated an American Standard on April 18, 1960.
At a meeting in February 1960, Subcommittee 2 approved a recommendationto reduce
the head heights for heavy, heavy semi-finished, and heavy finished hexagon bolts which
was subsequently approved by letter ballot of the B18 Committee on August 16, 1960. A
proposed standard for heavy hexagon structural bolts submitted and accepted by Subcommittee 2 at its October 17, 1960meeting was approved by letter ballot of the B18 Committee
on May 9, 1961, To meet the urgent needs of the steel construction industryit was considered necessary to publish the standard for the structural bolts
immediately. Consequently,
Appendix IV to ASA B18.2-1960 containing coverage for the revised heavy hexagon bolts
and the new heavy hexagon structural bolts was released in 1962.
In October of. 1961, Subcommittee 2 appointed a subgroup to review all product standards for square and hexagon bolts, screws, and nuts, and to recommend simplifications
which would becompatible with technical, production, and distribution advances that had
occurred over the prior several years. The subgroup presented its recommendations at a
meeting of Subcommittee 2 in October of 1962. It being agreed that theinternally and externally threaded products should be published in separate documents as
suggested, draft proposals for each were completed.
The proposed revision for square andhex nuts incorporated thefollowing subgroup recommendations: discontinuation of regular semi-finished nuts; elimination of regular hexagon and heavy hexagon nuts in sizes !4 in. through 1 in.; elimination of finished hexagon
nuts in sizes larger than 1 ‘/z in.; elimination of the washer face semi-finished style on finished seriesnuts in sizes % in. andsmaller and heavy seriesnuts insizes 7/16 in. and smaller;
removal of machine screw nuts (these nuts now contained in B18.6.3); and adoption of an
abbreviated product nomenclature. Letter ballot of this proposal to theB18 Committee resulted in approval. Following acceptance by the sponsor organizations therevision wassubmitted to the American Standards Association and designated ASA B1 8.2.2 on September
8, 1965.
Subcommittee 2 continued to further develop refinements initiated by the simplification
subgroup and study changes suggested by consumer interests. This workculminated in Subcommittee acceptance of a 1970 proposal incorporating,in addition to numerous editorial
changes, revisions to therequirements on angularityof bearing face and countersink diameters for thevarious hex nuts and heavy hex nuts, andinclusion of an appendix covering the
gaging of slots in slotted nuts. The proposed revision, after approvalby letter ballot of the
B18 Committee in March 1970, was subsequently approved by the sponsors andsubmitted
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to the American National Standards Institute for designation as an American National
Standard. This was granted on January 18, 1972.
A proposedrevision ofthe standard agreed upon by Subcommittee 2 incorporated a provision to enable consumers to specify heavy hex nuts and heavy hex jam nuts with close
bearing face angularity, when required; clarified intent with regard to width across flats on
nuts produced from bar stock; deleted coverage for hex castle nuts from the appendices;
and included numerous editorial refinements. This proposal was formally approved by letter ballot of the subcommittee and the B18 Committee. Following its acceptance by the
sponsor organizations the revision was referred to the American National Standards Institute and granted recognition as an American National Standard on February 27, 1987.
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ASME STANDARDS COMMITTEE B18
Standardization of Bolts, Nuts, Rivets, Screws, Washers, and Similar Fasteners
(The followingis the roster of the Committee at the time of approval of this Standard.)
OFFICERS
J. B. Levy, Chairman
H. W. Ellison, Vice Chairman
E. Schwartz, Vice Chairman
R. W. McGinnis, Secretary
COMMITTEE PERSONNEL
AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS
E. R. Friesth, Don E. Williams Co., Rock Island. Illinois
AMERICAN SOCIETY OF MECHANICAL ENGINEERS
A. R. Machell, Webster, New York
K. E. McCullough, SPS Technologies Inc., Jenkintown, Pennsylvania
ENGINE MANUFACTURERS ASSOCIATION
G. A. Russ, Cummins Engine Co., Columbus, Indiana
FARM & INDUSTRIAL EQUIPMENT INSTITUTE
D. A. Clever, Deere & Co., Moline, Illinois
HAND TOOL INSTITUTE
R. B. Wright, Wright Tool Co., Barberton, Ohio
INDUSTRIAL FASTENERS INSTITUTE
D. J. Broomfield, Illinois Tool Works Inc., Elgin, Illinois
O. A. Garrison, Russell, Burdsall & Ward Corp., Rock Falls, Illinois
R. M. Harris, Bethlehem Steel Corp., Lebanon, Pennsylvania
D. Lidl. Greensburg, Pennsylvania
J. C. McMurray, Alternate, Russell, Burdsall & Ward Inc., Cleveland, Ohio
J. S. Orlando, Chicago, Illinois
E. Sterling, Emhart Corp., Campbellsville, Kentucky
J. A. Trilling, Holo-Krome Co., West Hartford, Connecticut
S. W. Vas. Lake Erie Screw Corp., Cleveland, Ohio
C. J. WJson, Industrial Fasteners Institute, Cleveland, Ohio
METAL CUTTING TOOL INSTITUTE
D. Emanuelli, TRW - Greenfield Tap & Die, Greenfield, Massachusetts
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION
J. B. Levy, Scotia, New York
W, F. Montavon, Alternate, National Electrical Manufacturers Association, Washington, D.C.
F. F. Weingruber, Westinghouse Electric Corp., Pittsburgh, Pennsylvania
NATIONAL FASTENERS DISTRIBUTORS ASSOCIATION
J. F. Sullivan, Accurate Fasteners, Inc., South Boston, Massachusetts
vii
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SOCIETY OF AUTOMOTIVE ENGINEERS
H. W. Ellison, General Motors Corp., Warren, Michigan
R. S. Piotrowski, Mack TrucksInc., Allentown, Pennsylvania
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TUBULAR & MACHINE INSTITUTE
R. M. Byme. Trade Association Management Inc., Tarrytown, New York
J. G. Zeratsky, National Rivet & Manufacturing Co., Waupun, Wisconsin
U. S. DEPARTMENT OF THE ARMY
M. E. Taylor, U. S . Army Armament, Munitions & Chemical Command, Dover, New Jersey
A. Herskovitz, Alternate, U. S. Army Armament, Munitions & Chemical Command, Dover, New Jersey
J. E. Long, Alternate, U. S.Army Tank Command, Warren, Michigan
U. S. DEPARTMENT OF DEFENSE
E. Schwartz, Defense Industrial Supply Center, Philadelphia, Pennsylvania
L. Pieninck, Alternate, Defense Industrial Supply Center, Philadelphia, Pennsylvania
U. S. DEPARTMENT OF THE NAVY
J. E. Hass, Department of the Navy, Washington, D.C.
M. S. Orysh, Alternate, Department of the Navy, Philadelphia, Pennsylvania
INDIVIDUAL MEMBERS
A. R. Breed, Lakewood, Ohio
R. A. Flor, Chrysler Corp., Detroit, Michigan
G. A. Gobb, Ford Motor Co., Dearborn, Michigan
F. E. Graves, F. E. Graves Assoc., Fairfield, Connecticut
J. J. Naesset. Clark Equipment Co., Battle Creek, Michigan
SUBCOMMITTEE 2
- SQUARE AND HEX BOLTS AND NUTS
S. C. Adamek, Pheoll Mfg. Co., Chicago, Illinois
A. R. Breed, Lakewood, Ohio
R. M. Byme. Tarrytown, New York
D. A. Clever, Deere & Co., Moline, Illinois
W. J. Demer, FMC Corp., Indianapolis, Indiana
D. A. Garrison, Russell, Burdsall &Ward Corp., Rock Falls, Illinois
F. E. Graves, Fairfield, Connecticut
R. M. Hams, Bethlehem Steel Corp., Lebanon, Pennsylvania
J. B. Levy, Scotia, New York
A. R. Machell, Webster, New York
K. E. McCullough, SPS Technologies, Jenkintown. Pennsylvania
J. C. McMurray, Russell, Burdsall&Ward Corp., Cleveland, Ohio
A. Nebesny, Alternate, FMC Corp., Indianapolis, Indiana
I. M. Park, Stelco Wire Products, Ontario, Canada
L. Pieninck, Alternate, Defense Industrial Supply Center, Philadelphia, Pennsylvania
R. L. Tennis, Caterpillar TractorCo., Peoria, Illinois
S. W. Vass. Lake Erie Screw Corp., Cleveland, Ohio
F. F. Weingruber, Westinghouse Electric Corp., Pittsburgh, Pennsylvania
C. J. Wilson, Industrial Fasteners Institute, Cleveland, Ohio
viii
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CONTENTS
Foreword ..............................................................
Standards Committee Roster ..............................................
1
2
Introductory Notes ..................................................
General Data .......................................................
Tables
1 Dimensions of Square Nuts ...........................................
2 Dimensions of Hex Flat Nuts and Hex Flat Jam Nuts ....................
3 Dimensions of Hex Nuts andHexJam Nuts ............................
4 Dimensions
of
Hex
Slotted Nuts ......................................
5 Dimensions of Hex Thick Nuts .......................................
DimensionsofHex Thick Slotted Nuts .................................
Dimensions of Heavy Square Nuts ....................................
Dimensions of Heavy Hex Flat Nuts and Heavy Hex Flat Jam Nuts ........
Dimensions of Heavy Hex Nuts and Heavy Hex Jam Nuts ................
10Dimensions of Heavy Hex Slotted Nuts ................................
6
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7
8
9
...
111
vii
1
1
3
5
7
9
11
13
15
17
20
24
Appendices
I
II
III
Slot Gages and Gaging forSlotted Nuts ................................
Formulas for Nut Dimensions ........................................
Wrench Openings Applicable to Square and Hex Nuts ...................
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29
33
ASME/ANSI 818.2.2-1987
1 INTRODUCTORYNOTES
1.1 Scope
1.1.1 This Standard is intended to cover the complete general and dimensional data for the various
types of inch series square andhex nuts recognized as
“American National Standard.” Also included are
appendices covering gaging of slots in slotted nuts,
wrench openings for nuts, andformulas on which dimensional data are based. It should be understood,
however, that where questions arise concerning acceptance of product, the dimensions in the Tables
shall govern over recalculation by formula.
1.1.2 The inclusion of dimensional data in this
Standard is not intended to imply that all of the products described herein are stock production sizes. Consumers are requested to consult with manufacturers
concerning lists of stock production sizes.
1.2 Dimensions
All dimensions in this Standard arein inches, unless
stated otherwise.
Copies of referenced SAE standards may be obtained from the Society of Automotive Engineers,
Inc., 400 CommonwealthDrive,Warrendale, PA
15096
2 GENERAL DATA
2.1 Width Across Flats
The width across flats of nut shall be the distance
measured, perpendicular to theaxis of nut, overall between two oppositesides ofthe nutin accordance with
the notes on respective dimensional tables. For milledfrom-bar hex nuts, the nominal bar
size usedshall be
the closest commercially available size to thespecified
basic width across flats of the nut. For milled-frombar nonferrous nuts, the tabulated maximum (basic)
width acrws flats dimensions may be exceeded to conform with the commercial tolerances of drawn or
rolled bar stock material.
2.2 Nut Thickness
1.3 Options
Options, where specified, shall be at the discretion
of the manufacturer unless otherwise agreed upon by
the manufacturer and the purchaser.
The nutthickness shall be the overall distance, measured parallel to the axis of nut, from the top of the
nut to the bearing surface and shall include the thickness of the washer face where provided.
1.4 Terminology
2.3 Threads
For definitions of terms relating to fasteners or
component features thereof used in this standard, refer to ANSI B1 8.12, Glossary of Terms for Mechanical Fasteners.
Threads shall be Unified Standard, Class 2B,of the
series specified in the notes on respective dimensional
tables,inaccordancewithUnifiedInch
Screw
Threads (UN and UNR Thread Form), ANSI B1. l .
1.5 ReferencedStandards
Copies of referenced ASTM standards may be obtained from ASTM, 1916 Race Street, Philadelphia,
Pennsylvania 19103.
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2.3.1 Thread Gaging. Unless otherwise specified
by the purchaser,gaging for screw thread dimensional
acceptability shall be in accordance with Gaging System 21 as specified in ANSVASME B1.3MYScrew
Thread Gaging Systems for Dimensional Acceptability.
Not for Resale
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SQUARE AND HEX NUTS (INCH SERIES)
ASME/ANSI 618.2.2-1987
AND
SQUARE(INCHHEX NUTS
2.4 Finish
Unless otherwise specified, nuts shall be supplied
with a natural (as-processed) finish, unplated or uncoated.
2.5 Workmanship
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Nuts shall be free from burrs, seams, laps, loose
scale, irregular surfaces, and any defects affecting
their serviceability.
2.6 Designation
Nuts shall be designated by the following data in the
sequence shown: nominal size (fraction or decimal);
threads per inch; product name; material (including
specification, where necessary); protective finish, if
required.
EXAMPLES:
V z - 13 Square Nut, Steel, Zinc Plated
314 - 16 Hex Nut, SAE J995 Grade 5, Steel
1 .O00 - 8 Hex Thick Slotted Nut, ASTM F594
(Alloy Group 1) Corrosion Resistant Steel
2
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SERIES)
SQUARE AND HEX NUTS (INCH SERIES)
ASME/ANSI 618.2.2-1987
FG1r 1
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25 deg.
approx
’V
25 deg.
approx.
Optional
TABLE 1
Nominal Size
or
Basic Major Diarn.
of Thread
511fi
318
7116
’h
=la
3/4
718
1
1 ‘Is
1
1 Ys
1 ‘h
0.2500
0.3125
0.3750
0.4375
F
G
H
Width Across
Flats
Width Across
Corners
Thickness
Min.
0.235
0.283
0.346
0.203
0.249
0.310
0.356
Min.
Max.
Min.
%
0.425
0.547
0.606
0.728
0.619
0.438
0.795
0.884
1 .O61
0.554
0.562
0.625
0.750
13116
0.812
0.788
0.969
1 .O88
1.269
1.149
1.414
1.125
1.591
1.856
1 .O52
1.300
1.464
1.712
0.458
0.569
0.680
0.792
0.418
0.525
0.632
0.740
1.450
1.631
1.812
1.994
2.175
2.121
2.386
2.652
2.917
2.250
3.182
1.961
2.209
2.458
2.708
2.956
0.903
1 .O30
1.126
1.237
1.348
0.847
0.970
1 .O62
1.169
1.276
711fi
911fi
H
1
1 ‘Is
1 .o00
15/16
1.312
1 .o000
1 112
1.1250
1.2500
1.3750
l.5000
lV16
1.500
1.688
1.875
2.062
17 1 ~
21/16
2%
0.721
0.802
0.970
Basic
Max.
Max.
Basic
0.5000
0.6250
0.7500
0.8750
See
Note
DIMENSIONS OF SQUARENUTS
1
(For additional requirements refer to Notes onp. 4 and General Data on pp. 1 and 2.)
3
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0.394
ASME/ANSI 818.2.2-1987
SQUARE AND HEX NUTS (INCH SERIES)
TABLE 1 (CONT'D)
GENERAL NOTES:
Unification. Bolt type
indicates products unifieddimensionally with British andCanadian standards.
Tops of Nuts. Tops of nuts
shall be flat and chamfered or washercrowned. Diameter
of the chamfer circle
shall be equalt o the maximum widthacross flats withina tolerance of 15%. The surface of the chamfer may be slightlyconvex or rounded.
-
Bearing Surface. Bearing surface shall be perpendicular t o the axis of the threaded
hole within a tolerance of3 deg. for 1 in. nominal size nuts or smaller, and 2 deg. for
nuts larger than 1 in.
True Position of
Tapped Hole. The axisof tappedhole shall be located
at true position .
with respect t o t h eaxis of nut body within a tolerancezone having a diameter equivalent t o 10% of the maximum widthacross flats, regardless of feature size.
Threads. Threads shall be unified coarse thread series (UNC series), Class 28.
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Material. Unless otherwise specified, chemical and mechanical properties of steel
nuts shall conform with Grade A of ASTM A 563, Carbon and Alloy Steel Nuts. Nuts of
other materials such as corrosion resistant (stainless) steel, brass, bronze, and aluminum alloys shall have propertiesas agreed upon between themanufacturer and purchaser. The properties for nutsseveral
of
grades of corrosion resistantsteel alloys are
covered in ASTM F 594, and of several nonferrous materials in ASTM F 467.
NOTE:
(1) Width Across Flats. Maximum width across flats shall not beexceeded (see excepnut between 25% and 75%
tion in General Data). No transversesection through the
of the actualnut thickness as measured from the bearing surface shallbe less than
the minimum widthacross flats.
4
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SQUARE AND HEX NUTS (INCH SERIES)
ASME/ANSI 618.2.2-1987
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TABLE 2
DIMENSIONS OF HEX FLAT NUTS AND HEX FLAT JAM NUTS
I
Nominal Size
or
Basic Major Diam.
of Thread
1%
l'/a
1%
1112
1.1250
1.2500
1.3750
1.5000
I
F
Max.
Min.
11%6
1%
1.688
1.875
1.631
1.812
1.994
2.175
See
Notes
1
Hl
Thickness
Hex Fiat JamNuts
Thickness
Hex Flat Nuts
Corners
Basic
I
H
Width Across
Width Across
Flats
2%6
2%
I
G
Max.
Min.
Basic
Max.
Mm.
Basic
Max.
Min.
1
1.949
2.165
1732
1%
2.598
16/16
1.030
0.970
1.062
%
1.126
v4
2.382
2.062
2.250
1.859
2.066
2.273
2.480
1.276
1.348
'18
0.655
0.782
0.846
0.91 1
0.595
0.718
0.778
1.169
0.839
1.237
2
~
~~~
(For additional requirements referto Notes on p. 6 and General Data on pp. 7 and 2.1
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SQUARE AND HEX NUTS (INCH SERIES)
ASMElANSl 818.2.2-1987
TABLE 2 (CONT’D)
GENERAL NOTES:
(a) Unification. Bold type indicates products unifieddimensionally with British and Canadian standards.
(b) Smaller Sizes. For sizes
mended.
‘/4
in. through 1 in., the nuts specified in Table 3 are recom-
( c ) Tops of Nuts.Tops of nutsshall beflat and chamfered. Diameterof thechamfer circle
shall be equal to the maximum width
across flats within a tolerance of 15%. The
1 5% of the
basic thread diamelength ofchamfer at hex corners shallbe from 5% to
ter. The surface of chamfer may be slightly convex or rounded.
-
(dl Bearing Surface. Bearing surface shall be flat and perpendicular t o the axis of the
threaded hole within a tolerance of 2 deg.
(e) True Positionof Tapped Hole. The axis of tapped hole
shall belocated at true position
with respect to theaxis of nut body within a tolerance zone having a diameter equivalent to 4% of the maximum width
across flats, regardless o f feature size.
( f ) Threads. Threads shall be unified coarse thread series (UNC series), Class 26.
(g) Material. Unless otherwise specified, chemical and mechanical properties
of steel
nuts shall conform withGrade A of ASTMA 563, Carbon andAlloy Steel Nuts. Nuts
of other materials such as corrosion resistant (stainless) steel, brass, bronze, and aluminum alloys shall have properties as agreed upon between the manufacturerand
purchaser. The propertiesfor nuts of
several grades of corrosion resistant steel alloys
are covered in ASTM F 594, and of several nonferrous materials in ASTM F 467.
NOTES:
( 1 1 Width Across Flats. Maximum width across flats shall not beexceeded (see exception inGeneral Data). No transverse section through the nut between
25% and 7 5 %
of the actual nut thickness
as measured from thebearing surface shall be less than
the minimum widthacross flats. For milled-from-bar nuts, see statement in General
Data pertaining to thenominal bar size t o be used.
(21 Corner Fill. A rounding or lack of fill at junction ofhex corners with chamfer shall be
permissible provided the width
across cornersis within specified limits atand beyond
a distance equal to 17.5% of the
basic thread diameter from the chamferedface.
6
--`,,```,,,,````-`-`,,`,,`,`,,`---
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale
-J
“116
m6
2
0.5625
0.6250
0.7500
0.8750
1 .oooo
1.1250
1.2500
1.3750
1.5000
1
1 ‘la
1%
13/e
1 ‘I2
See
Notes
%
%
‘la
‘I4
1 ‘I2
1”llR
1 ‘Is
1 'I6
1%6
314
r/s
‘VI6
0.5000
‘I2
YlS
Max.
Across
Flats
F
1
1.500
1.688
1.875
2.062
2,250
0.750
0.875
0.938
1.125
1.312
0.438
0.500
0.562
0.688
Width
‘I2
9116
ll16
02500
0.3125
0.3750
0.4375
-
Basic
‘I4
%a
%
‘II6
OI
Major Diam.
of Thread
Sire
Basic
Nominal
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
1.450
1.631
1.812
1.994
2.175
0.736
0.861
0.922
1.088
1.269
-0.428
0.489
0.551
0.675
Min.
G
Max.
2
Not for Resale
1.732
1.949
2.165
2.382
2.598
I_-
0.866
1.010
1.083
1.299
1.516
1.653
1.859
2.066
2.273
2.480
-
0.840
0.982
1.051
1.240
1.447
0.488
0.557
0.628
0.768
Min.
--
DIMENSIONS
Width Across
Corners
0.505
0.577
0.650
0.794
--
--
TABLE 3
1 ‘Its
1 (‘la4
1 s/X?
3’132
66164
%s
3’164
=-I64
“I64
k
Ya
2’/ar
’ ‘I64
‘I32
Basic
0.831
0.939
1.030
1.138
1.245
0.427
0.473
0.535
0.617
0.724
0.212
0.258
0.320
0.365
Min.
--
/For additional
0.887
0.999
1.094
1.206
1.317
0.448
0.496
0.559
0.665
0.776
0.226
0.273
0.337
0.385
Max.
Thickness
Hex Nuts
H
requirements
27i32
%2
-%2
=164
35l64
3 ‘I64
27164
Va
=I16
VI 5
‘14
6132
Yl a
‘I32
Basic
refer
0.575
0.639
0.751
0815
0.889
0.323
0.324
0.387
0.446
0.510
0.163
0.195
0.227
0.260
Max.
0.519
0.579
0.687
0.747
0.808
.___.-
0.302
0.301
0.363
0.398
0.458
0.150
0.180
0.210
0.240
Min.
to Notes
Thickness
Hex Jam Nuts
OF HEX NUTS AND HEX JAM NUTS
0.016 in.
approx.
H
i-1
El
0.027
0.030
0.033
0.036
0.039
0.019
0.020
0.021
0.023
0.025
0.01 5
0.016
0.017
0.018
up to
150,000
Psi
on p. 8 and
--
--
Nuts
of Bearing
General
--
Data
3
0.022
0.025
0.028
0.031
0.034
0.014
0.015
0.016
0.018
0.020
0.010
0.011
0.012
0.013
Max.
150,000
psi and
Greater
Specified
Proof
Load
Hex
Runout
on pp.
Face
Hex
Nuts
1 and
0.027
0.030
0.033
0.036
0.039
0.019
0.020
0.021
0.023
0.025
0.015
0.016
0.017
0.018
All
Strength
Levels
Jam
FIM
2.j
SQUARE AND HEX NUTS (INCH SERIES)
ASME/ANSI B18.2.2-1987
TABLE 3 ICONT'D)
GENERAL NOTES:
Unification. Boldtype indicates products unified
dimensionally with British and Canadian standards. Unification of fine thread nutsis limited t o sizes l in. and smaller.
True Positionof Tapped Hole. The axisof tappedhole shallbe located at true position
with respect to theaxis of nut body within a tolerance zone having a diameter equivawidth across flats, regardless of feature size.
lent to 4% of the maximum
Countersink. Tapped hole shall countersunk
be
on the bearing or
face
faces. The maximum countersink diameter shall be the thread basic (nominal) major diameter plus
0.030 in. for 3/8 in. nominal size nuts and smaller, and 1 .O8 times the basic major
diameter for nuts larger than 3/8 in. No part of the threaded portion
shall project beyond the bearing surface.
Threads. Threads shall beunified coarse, fine, or 8 thread series (UNC, UNF or 8 UN
series), Class 28.
Material. Unless otherwise specified, chemical and mechanical properties of steel
nuts shall conform with Grade A of ASTM A 563, Carbon and Alloy Steel Nuts; or
Grade 2 of SAE J995, Mechanical and Material Requirements for Steel Nuts. Nuts of
other materials suchas corrosion resistant(stainless) steel, brass, bronze, and aluminum alloys shall have propertiesas agreed upon between the manufacturer
and purare
chaser. The properties for nuts of
several gradesof corrosion resistant steel alloys
covered in ASTM F 594, and of several nonferrous materials in the ASTM F 467.
NOTES:
Width Across Flats. Maximum width across flats shall not be exceeded (see exception inGeneral Data). No transverse action through nut
thebetween 25% and 7 5 % of
the actual nut thicknessas measured from thebearing surface shall be
less than the
minimum widthacross flats. For milled-from-bar nuts, see statement in General Data
pertaining to thenominal bar size t o be used.
Corner Fill. A rounding or lack of fill at junction hex
of corners with chamfer shall be
permissible provided thewidth across corners is within specified limits
a?and beyond
a distance equal to 17.5% of thebasic thread diameter from the chamfered faces.
Tops and Bearing Surfaces o f Nuts. Nuts in sizes 5/..in. nominal size andsmaller shall
be double chamfered. Larger size nuts shall be double chamfered or have washer
faced bearing surface and chamfered top.
The diameter of chamfer circle ondouble chamfered nutsand diameter of washer
face shall be within the limits of the maximum across
width flats and95% of theminimum width across flats.
The tops ofwasher faced nutsshall be flatand the diameter of chamfer circle shall
be equal to the maximum width
across flats withina tolerance o f 15%. The length
of chamfer at hexcorners shallbe from5% t o 15% of the
basic thread diameter. The
surface of chamfer may be slightly convexor rounded.
Bearing surfaces shall be flat and perpendicular t o t h eaxis of the threaded hole
nut type and strength level.
within the FIM limits specified for the respective
-
8
--`,,```,,,,````-`-`,,`,,`,`,,`---
Copyright ASME International
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No reproduction or networking permitted without license from IHS
Not for Resale
0.2500
0.3125
0.3750
0.4375
0.5000
0.5825
0.8250
0.7500
0.8750
1 .oooo
1.1250
1.2500
1.3750
1.5000
‘k
‘I18
‘I2
%s
%
%
1
1
1 ‘Is
1 ‘k
See
Notes
I’/2
1318
%
%6
Major Diem.
of Thread
Basic
Size
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
W
01
Nomlnal
2%
1 “Its
1 ‘Iis
2vre
1 'I2
lhe
1 ‘/a
'Y1s
314
'I0
"I16
‘I2
Y1e
‘I16
8dC
Max.
Across
Flats
1
1.500
1.888
1.875
2.082
2.250
0.750
0.875
0.938
1.125
1.312
0.438
0.500
0.582
0.888
Wldth
F
1.450
1.831
1.812
1.994
2.176
0.738
0.881
0.922
1.088
1.289
0.428
0.489
0.551
0.875
Min.
G
DIMENSIONS
Not for Resale
1.853
1.859
2.088
2.273
2.480
1.732
1.949
2.185
2.382
2.598
2
0.840
0.982
1.051
1.240
1.447
0.488
0.557
0.828
0.788
Min.
0.886
1.010
1.083
1.299
1.618
0.506
0.577
0.850
0.794
Max.
Width
Across
Corners
TABLE 4
0.887
0.999
1.094
1.208
1.317
0.448
0.498
0.559
0.685
0.778
0.228
0.273
0.337
0.385
Max.
(For additional
19/a,
l”lO4
1’116
3’/32
%I4
‘he
%4
%4
%4
k
%I
2’l64
’ ‘I84
‘I32
Bask
Thickness
H
requirements
0.831
0.939
1.030
1.138
1.245
0.427
0.473
0.535
0.817
0.724
0.212
0.258
0.320
0.365
Min.
-
refer
OF HEX SLOTTED NUTS
3
to Notes
0.59
0.84
0.70
0.82
0.88
0.29
0.31
0.34
0.40
0.52
0.14
0.18
0.21
0.23
Max.
Unslotted
Thickness
T
on p.
0.58
0.61
0.67
0.78
0.82
0.27
0.29
0.32
0.38
0.49
0.12
0.18
0.19
0.21
Min.
10 and
General
0.30
0.33
0.40
0.40
0.48
0.18
0.18
0.24
0.24
0.24
0.10
0.12
0.15
0.15
Max.
3
Data
0.24
0.24
0.31
0.31
0.37
0.15
0.15
0.18
0.18
0.18
on pp.
Min.
0.07
0.09
0.12
0.12
Width
of
Slot
s
1 and 2.)
4
0.027
0.030
0.033
0.036
0.039
0.019
0.020
0.021
0.023
0.025
0.015
0.016
0.017
0.018
Max.
Runout
of
Bearing
Surface
FIM
--`,,```,,,,````-`-`,,`,,`,`,,`---
7
SQUARE AND HEX NUTS (INCHSERIES)
ASME/ANSI 618.2.2-1987
TABLE 4 (CONT'D)
GENERAL NOTES:
Unification. Bold type indicates products unified
dimensionally with British andCanadian standards. Unification of fine thread nutsis limited t o sizes l in. and under.
True Position ofTapped Hole. The axis of tapped
hole shallbe located at true position
with respectt o t h e
axis o f nut body withina tolerance zone having a diameter equivaacross flats, regardless of feature size.
lent t o 4% of the maximum width
Countersink. Tapped hole shall be countersunk on the bearing face. The maximum
countersink diameter shall be
the threadbasic (nominal) major diameter
plus 0.030 in.
for 3/8 in. nominal size nuts andsmaller, and 1 .O8 times thebasic major diameter for
nuts larger than 3/8 in. No part of the
threaded portion shall project beyond the
bearing
surface.
Threads. Threads shall be unifiedcoarse, fine, or 8 thread series (UNC, UNF or 8 UN
series), Class 2B.
Material. Unless otherwise specified, chemical and mechanical properties of steel
nuts shall conform with Grade A of ASTM A 563, Carbon and Alloy Steel Nuts; or
Grade 2 of SAE J995, Mechanical and Material Requirementsfor SteelNuts. Nuts of
other materials suchas corrosion resistant (stainless)steel, brass, bronze, and alumipurnum alloys shall have
properties as agreed upon between the manufacturer and
chaser. The properties for nutsseveral
of grades of corrosion resistantsteel alloys are
covered in ASTM F 594, and of several nonferrous materials in ASTM F 467.
NOTES:
Width Across Flats. Maximum widthacross flats shall not beexceeded (see exception in General Data). Notransverse section through thenut between 25% and 75%
of the actualnut thickness as measured from thebearing surface shall be less than
the minimum width across flats. For milled-from-bar nuts, see statement in General
Data pertaining t o t h enominal bar size t o be used.
Corner Fill. A rounding or lack offill at junction ofhex corners with chamfer shall be
permissible provided the width
across corners is withinspecified limits atand beyond
a distance equal t o 17.5% of thebasic thread diameter from the chamferedfaces.
Slots. Slots shallbe normal t o nut flats. Contour of bottom of slots
shall be atmanufacturer's option. Requirements for gaging slots are in Appendix I.
Tops and Bearing Surfacesof Nuts. Nuts sizes
in
5/8 in. nominal size and smaller shall
be double chamfered. Larger size nuts shall be double chamfered or have washer
faced bearing surface and chamfered top.
The diameter o f chamfer circle on double chamfered nutsand diameter of washer
within the limits of the maximum
width across flats and 95% of the miniface shall be
mum width across flats.
The top ofwasher faced nutsshall be flatand the diameter of chamfer circleshall
be equalto the maximum width
across flats withina tolerance o f 1 5 % . The length
of chamfer at hex
corners shallbe from5% t o 1 5 % o f basic
t h e thread diameter. The
surface of chamfer may be slightlyconvex or rounded.
Bearing surface shall be flat and perpendicular to the axis of the threaded hole
within the specifiedFIM limit.
-
10
--`,,```,,,,````-`-`,,`,,`,`,,`---
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale
SQUARE AND HEX NUTS (INCH SERIES)
--`,,```,,,,````-`-`,,`,,`,`,,`---
ASMElANSl 618.2.2-1987
t-7
.0.016 in.
awrox.
TABLE 5
DIMENSIONS OF HEX THICK NUTS
1
F
I
G
lunout of Bearing Face FIM
H
specifkd Roof Load
Nommal Size
of
Basic Major Diem.
of Thread
V4
S/i6
Va
%S
'h
'116
%
314
1' .9
1
1.12501%
1%
13/13
1v 2
2-jq-55
W a Across
F b
Greater
Ma.
Ma.
Mm.
Max.
Mm.
Basic
Max.
Min.
0.2500
0.31 25
0.3750
0.4375
0.438
0.500
0.562
0.688
0.428
0.489
0.551
0.675
0.505
0.577
0.650
0.794
0.488
0.557
0.628
0.768
'132
0.288
0.336
0.41 5
0.463
0.274
0.320
0.398
0.444
0.01 5
0.01 6
0.017
0.018
0.01o
0.01 1
0.01 2
0.01 3
0.5000
0.5625
0.6250
0.7500
0.8750
0.750
0.875
0.938
1.125
1.312
0.736
0.861
0.922
1.O88
1.269
0.866
1 .o10
1 .O83
1.299
1.516
0.840
0.892
1.051
1.240
1.447
0.573
0.621
0.731
0.827
0.922
0.552
0.598
0.706
0.798
0.890
0.01 9
0.020
0.021
0.023
0.025
0.014
0.01 5
0.01 6
0.01 8
0.020
1.oOOo
1.500
1.688
1.875
2.062
2.250
1.450
1.631
1.812
1.994
2.175
1.732
1.949
2.165
2.382
2.598
1.653
1.859
2.066
2.273
2.480
1.O1 8
1.176
1.272
1.399
1.526
0.982
1.136
1.228
1.351
1.474
0.027
0.030
0.033
0.022
0.025
0.028
0.031
0.034
1.2500
1.3750
1.5000
See
Notes
21/w
932
291~4
%S
%a
2%
%
20/32
1
1%
1%
1%
1112
1
0.036
0.039
3
(For additional requirements refer to Notes on p. 12 and General Dete on pp. 1 and 2.1
11
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale
ASME/ANSI 618.2.2-1987
SQUARE(INCH
AND HEX NUTS
SERIES)
TABLE 5 (CONT'D)
GENERAL NOTES:
(a) True Position of Tapped
Hole. The axis of tapped hole shall be located at true position
with respect to theaxis of nut body within a tolerance
zone having a diameter equivalent to 4% of the maximum width across
flats, regardless of feature size.
(b) Countersink. Tapped hole shall
be countersunk on the bearing or
face
faces. The maximum countersink diameter shall be the thread
basic (nominal) major diameter plus
0.030 in. for 3/8 in. nominal sire nuts and smaller, and 1 .O8 times the basic major
bediameter for nuts larger than3/8 in. No part of the threaded portion shall project
yond the bearingsurface.
(c) Threads. Threads shall beunified coarse, fine, or 8 thread series (UNC, UNF or 8 UN
series), Class 28.
(d) Material. Unless otherwise specified, chemical and mechanical properties of steel
nuts shall conform withGrade A of ASTM A 563, Carbon and Alloy Steel Nuts; or
Grade 2 o f SAE J995, Mechanical and Material Requirements Steel
for Nuts. Nuts of
other materials such
as corrosion resistant (stainless)
steel, brass,bronze, and aluminum alloys shall have propertiesas agreed upon between the manufacturerand purchaser. The properties for nuts of several
grades of corrosion resistant steel alloys
are
in ASTM F 467.
covered in ASTM F 594, and of several nonferrous materials
NOTES:
(1 1 Width Across Flats. Maximum width across flats
shall not be exceeded (see exception in General Data). Notransverse section through the nut between and
25%75%
be less than
of the actualnut thickness as measured from the bearing surface shall
the minimumwidth across flats. For milled-from-bar nuts,see statement in General
Data pertainingt o t h enominal bar size t o be used.
shall be
(2) Corner Fill. A rounding or lack of fill at junction of hex corners with chamfer
permissible provided the
width acrosscorners is within specified limitsand
at beyond
a distance equalt o 17.5% of the basic thread diameter from the chamfered
faces.
(31 Tops and BearingSurfaces of Nuts. Nuts insizes
in. nominal size and smaller shall
be double chamfered. Larger sire nuts shall be double chamfered or have washer
faced bearing surface and chamfered top.
The diameter of chamfer circle on double chamfered nuts and diameter of washer
face shall be within the limits of the maximum
acrosswidth
flats and 95% of the minimum width acrossflats.
The tops of washer faced nuts shall
be flat and the diameter of chamfer circle shall
be equal t o t h emaximum width across flats within a tolerance 15%.
of
The length
basic thread
diameter. The
of chamfer at hex corners shall be from 5% oftothe15%
surface of chamfer may be slightly convex or rounded.
Bearing surfaces shall be flat and perpendicular to the axis of the threaded hole
within the FIM limitsspecified for the respective strength level.
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
12
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale
3l4
0.6000
0.6626
0.6260
0.7600
0.8760
‘I2
B/IS
%
Stltl
Notes
1
1 ‘lo
1 ‘I4
l?b
1 ‘I2
‘I8
k
1
‘I2
I%,
1 ‘Is
‘?h
‘la
Yl4
2%
1 ‘Ia
2’lte
I”/14
--`,,```,,,,````-`-`,,`,,`,`,,`---
1 .oooo
1.1260
1.2500
1.3760
1 .sooo
‘Vte
%
416
‘I2
‘he
0.2500
0.3126
0.3760
0.4375
%6
‘14
Basic
Major Dlsm.
of Thread
Size
Basic
Or
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
t;
Nominal
1
1.600
1.888
1.876
2.082
2.260
1.460
1 .a31
1.812
1.994
2.176
0.736
0.881
0.922
1 .oaa
1.289
0.760
0.876
0.938
1.126
1.312
Mkt.
0.428
0.499
0.661
0.876
MSX.
Across
Flats
0.438
0.600
0.582
0.888
Width
F
-
1.732
1.949
2.185
2.382
2.698
0.888
1.010
1.083
1.299
1.518
0.505
0.677
0.860
0.794
MOX.
2
-
Min.
1.863
1.859
2.088
2.273
2.480
0.840
0.992
1.061
1.240
1.447
0.488
0.567
0.828
0.768
Width Acrorr
Comoro
-
0
DIMENSIONS
Not for Resale
--
-
TABLE 6
r
F-
fFo/
1 ‘I4
1%
1 ‘I2
w22
1
nls2
‘3/(6
‘Y22
%u
Yl6
kz
“‘I64
%2
*%4
Bmalc
additional
1.018
1.176
1.272
1.399
1.628
0.673
0.821
0.731
0.827
0.922
0.288
0.338
0.415
0.463
Max.
Thickness
H
requirements
0.982
1.138
1.228
1.361
1.474
0.662
0.698
0.708
0.798
0.890
0.274
0.320
0.398
0.444
Min.
refer
T
to Notes
3
Unslotted
Thickness
0.73
0.63
0.89
1.02
1 .OB
0.42
0.43
0.61
0.57
0.67
0.20
0.24
0.29
0.31
Max.
OF HEX THICK SLOTTED NUTS
0.016 in.
approx.
on p.
0.70
0.80
0.86
0.98
1.04
0.40
0.41
0.49
0.55
0.64
0.18
0.22
0.27
0.29
Mln.
14 and
3
General
Data
on pp.
1 and 2.1
4
0.027
0.030
0.033
0.036
0.039
0.24
0.24
0.31
0.31
0.37
0.30
0.33
0.40
0.40
0.40
0.019
0.020
0.021
0.023
0.025
0.15
0.16
0.18
0.18
0.16
0.18
0.18
0.24
0.24
0.24
0.015
0.016
0.017
0.016
Max.
0.07
0.09
0.12
0.12
Min.
Runout
of
Bearing
Surface
FIM
0.10
0.12
0.16
0.15
Max.
Width
of
Slot
S
ASMElANSl 818.2.2-1987
HEX
AND
SQUARE
NUTS (INCH SERIES)
TABLE 6 (CONT'D)
GENERAL NOTES:
Unification. Bold type indicates products unified dimensionally
with Britishand Canadian standards. Unification of fine thread products is limited
t o sizes l in. and under.
True Positionof Tapped Hole. The axis of tapped hole shall be located at true position
with respect to theaxis of nut body within
a tolerance zone having a diameter equivasize.
lent t o 4% of the maximum width across flats, regardless of feature
Countersink. Tapped hole shall be countersunk on the bearingface. The maximum
0.030
countersink diameter
shall bethe thread basic (nominal) major diameter
plusin.
for 3/8 in. nominalsize nuts and smaller, and1.O8 times thebasic major diameter for
nuts larger than 3/8 in. No part of the threaded portion shall project beyond the bearing
surface.
Threads. Threads shall be unified coarse, fine, or
8 thread series (UNC, UNF or 8 UN
series), Class 2B.
Material. Unless otherwise specified, chemical and mechanical properties of steel
nuts shall conform with Grade A of ASTM A 563, Carbon and Alloy SteelNuts; or
Grade 2 of SAE J995, Mechanical and Material Requirements for Steel Nuts. Nuts of
other materials such
as corrosion resistant (stainless) steel, brass,
bronze, and aluminum alloys shall have properties
as agreed upon between the manufacturer
and purchaser. The properties for nuts of several grades of corrosion resistant steel alloys are
covered in ASTM F 594, and of several nonferrous materials in ASTM F 467.
NOTES:
Width Across Flats. Maximum width across flats shall not
be exceeded (see excep25% and 75%
tion inGeneral Data). No transverse section through
the nut between
of theactual nut thicknessas measured from the bearing surface shall less
be than
the minimum width across flats. For milled-from-bar nuts, seestatement in General
Data pertaining to the nominalbar size t o be used.
Corner Fill. A roundingor lack of fill at junction of hex corners with chamfer
shall be
permissible provided the width across corners is within specified limits at and beyond
the chamfered faces.
a distance equal to 17.5% of the basic thread diameter from
Slots. Slots shall be normal
t o n uflats.
t
Contour of bottom of slots shall
be at manufacturer's option, Requirements for gaging slots arein Appendix I.
Tops and Bearing Surfacesof Nuts. Nuts in sizes 5/8 in. nominal size and smaller shall
be double chamfered. Larger size nuts shall be double chamfered or have washer
faced bearing surfaceand chamfered top.
The diameter of chamfer circle on double chamfered nuts
and diameter of washer
withinthe limits of the maximum width across
andflats
95% of the miniface shall be
mum width across flats.
be flat and the diameter of chamfer circle shall
The topof washer faced nuts shall
be equalto the maximum
width across flatswithin a tolerance of 15%. The length
of chamfer at hex
corners shall be
from 5% t o 1 5% of thebasic thread diameter. The
surface of chamfer maybe siightly convex or rounded.
Bearing surface shall be flat and perpendicular to the axis of the threaded hole
within the FIM limits specified for the respective strength level.
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
14
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SQUARE AND HEX NUTS (INCH SERIES)
ASMEIANSI 818.2.2-1987
25 deg, approx.
25 deg.
25 deg.
approx.
approx
Optional
DIMENSIONS OF HEAVY SQUARE NUTS
TABLE 7
I
F
Nominal Size
I
Width Across
Width Across
Comers
Flats
Basic Major Diam.
of Thread
'14
%6
318
7/1 6
111
51~
3/4
71~
1
1 118
1
1 318
1 '12
0.2500
0.3125
0.3750
0.4375
O.5000
0.6250
0.7500
0.8750
1 .o000
1.1250
1.2500
1.3750
1.5000
See
Note
Basic
Max.
Min.
112
0.500
0.562
0.688
0.750
0.488
O.546
0.669
0.728
0.875
1 .O62
1.250
1.438
0.850
1 .O31
1.212
1.394
1.625
1.812
2.000
2.1 88
2.375
1.575
1.756
1.938
2.119
2.300
'11
6
"116
v4
718
1 '116
1
1 1' 6
1I
1 13/16
2
23/16
23/s
I
G
-
Thickness
Max.
Min.
0.640
0.720
0.889
0.970
0.266
0.330
0.393
0.456
0.218
0.280
0.341
0.403
1.237
l. 503
1.768
2.033
1.137
1.386
1.635
1 .B84
0.520
0.647
0.771
0.901
0.464
0.587
0.710
0.833
2.298
2.563
2.828
3.094
3.359
2.132
2.381
2.631
2.879
3.128
1 .O28
0.956
1 .O79
1.187
1.310
1.433
Mm.
1
H
0.707
0.795
0.973
1 .O60
~
1.155
1.282
1.409
1.536
1
(For additional requirements refer to Notes on p. 16 and General Data on pp. 1 and 2.1
--`,,```,,,,````-`-`,,`,,`,`,,`---
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ASMElANSl 818.2.2-1987
NUTS
HEX
AND
SQUARE
(INCH SERIES)
TABLE 7 (CONT'D)
GENERAL NOTES:
(al Tops of Nuts. Tops of nuts
shall beflat and chamfered or washer crowned.Diameter
of the chamfer circle shall
be equal t o the maximum width
across flats withina tolerance of 15%. The surface of chamfer maybe slightly convex or rounded.
-
(b) Bearing Surface. Bearing surface shall be perpendicular to the axis of the threaded
hole within a tolerance 3
ofdeg. for 1 in. nominal size nuts andsmaller, and 2 deg. for
nuts larger than 1 in.
(c) True Positionof Tapped Hole. The axis of tapped
hole shall be located at true position
with respectto the
axis of nut body within a tolerance
zone having a diameter equivaacross flats, regardless of feature size.
lent t o 10% of the maximum width
(dl Threads. Threads shall be unified coarse thread series (UNC series), Class 2B.
--`,,```,,,,````-`-`,,`,,`,`,,`---
(e) Material. Unless otherwise specified, chemical and mechanical properties of steel
with Grade A of ASTMA 563, Carbon and Alloy SteelNuts.. Nuts
nuts shall conform
of other materials such
as corrosion resistant (stainless)
steel, brass, bronze, and aluminum alloys shall have properties as agreed upon between the manufacturer and
purchaser. The properties for nuts
o f several grades of corrosion resistant steel alloys
are covered in ASTM F 594, and of several nonferrous materials in ASTMF 467.
NOTE:
(1) Width Across Flats. Maximum width across flats shall not be exceeded (see exception in General Data). Notransverse section through the nut between
25% and 75%
of the actual nut thicknessas measured fromthe bearing surface shallbe less than
the minimum widthacross flats.
16
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ASME/ANSI 818.2.2-1987
SQUARE AND HEX NUTS (INCH SERIES)
TABLE 8
DIMENSIONS OF HEAVY HEX FLAT NUTS AND HEAVY HEX FLAT JAM NUTS
Nominal Sire
or
Basic Major Diam.
of Thread
F
G
H
H1
Width Across
Flats
Width Across
Comers
Thickness
Heavy Hex Flat Nuts
Thickness
Heavv Hex Flat Jam Nuts
--`,,```,,,,````-`-`,,`,,`,`,,`---
Basic
Max.
Min.
Max.
Mm.
2.002
2.209
2.416
2.622
1%
1 .O79
1.187
1.310
1.433
0.655
0.782
1112
1.155
1.282
1.409
1.536
0.579
0.687
0.747
0.808
3.175
3.608
3.035
3.449
1%
2
1.790
2.044
1.679
1.925
1 .o40
1.169
0.929
3.388,
3.750
4.1 12
4.041
4.474
4.907
3.862
4.275
4.688
2%
2'12
2%
2.298
2.552
2.806
2.155
2.401
2.647
1.298
1.552
1.681
1.155
1.401
1.522
4.475
4.838
5.200
5.562
5.925
5.340
5.774
6.207
6.640
7.073
5.102
5.51 5
5.928
6.341
6.755
3
3.060
3% 3.314
3.568
3%
3.822
33l4
4 4.076
2.893
3.124
3.370
3.61 6
3.862
1.81 O
1.939
2.068
2.197
2.326
1.643
1.748
1.870
1.990
2.112
Mm.
11h
1.1260
1.2500
1.3750
1.5000
1.812
2.000
2.188
2.375
1.756 2.093
1.938 2.309
2.119 2.526
2.300 2.742
1%
2
1.7500
2.0000
2.750
3.125
2.662
3.025
2.2500
2.5000
3.500
3.875
4.250
4.625
5.000
5.375
5.750
6.125
1%
IV4
1%
2%
2%
2.7500
2%
3.0000
3
3.25003%
3.5000
3%
3.7500
3%
4.0000
4
See
Notes
1
Min.
Max.
Max.
1114
1%
0.846
0.911
1 .o50
2
(For additional requirements referto Notes on p . 18 and General Data on pp. I and 2.1
17
Copyright ASME International
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SQUARE AND HEX NUTS (INCH SERIES)
ASMElANSl 818.2.2-1987
TABLE 8 (CONT'D)
GENERAL NOTES:
(a) Unification. Bold type indicates products unified dimensionally
with British andCanadian standards.
(b) Smaller Sizes. For sizes '/4 in. through 1 in., the nuts specified inTable 9 are recommended.
(c) Tops of Nuts. Tops of nuts be
shall
flat and chamfered. Diameter of the chamfer circle
shall be equal to the maximum widthacross flats within a tolerance of 15%. The
length of chamfer at
hex corners shallbe from 5% t o 15% of thebasic thread diameter. The surface of chamfer maybe slightly convex or rounded.
-
(dl Bearing Surface. Bearing surface shall be flat and perpendicular to the axis of the
threaded hole withina tolerance of 2 deg.
(e) True Positionof Tapped Hole. The axis of tapped hole shall
be locatedat true position
to the axis of nut body within
a tolerance zone having a diameter equivawith respect
lent to 4% of the maximum width across flats
1'hfor
in. nominal size nuts or smaller
and 6% of the maximum width across flats for larger
nuts than 1'h in., regardless of
feature size.
(f) Threads. Threads shall be unified coarse thread series (UNC series), Class 28.
(9) Material. Unless otherwise specified, chemical and mechanical properties of steel
nuts shall conform with
Grade A of ASTM A 563, Carbon and Alloy Steel Nuts. Nuts
of other materials such
as corrosion resistant (stainlessrsteel,brass, bronze, and aluminum alloys shall have propertiesas agreed upon between the manufacturer and
purchaser. The properties for nuts
several
of grades of corrosion resistant steel alloys
are covered in ASTM F 594, and of several nonferrous materials in ASTMF 467.
NOTES:
(1) Width Across Flats. Maximum widthacross flats shall not be exceeded(see excep25% and 75%
tion inGeneral Data). No
transverse section through the nut between
of the actual nut thickness
as measured from the bearing surface shall
be less than
the minimum widthacross flats. For milled-from-bar nuts, see statement in General
Data pertaining to the nominalbar size t o be used.
(2) Corner Fill. A rounding or lack of fill at junction of hex corners with chamferbe
shall
permissible provided the width
across corners is within specified limits at and beyond
a distance equalt o 17.5% of the basic thread diameter from the chamferedface.
18
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SQUARE AND HEX
ASMElANSl 818.2.2-1987
NUTS (INCH SERIES)
(Table 9 begins on following page.)
19
--`,,```,,,,````-`-`,,`,,`,`,,`---
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Copyright ASME International
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No reproduction or networking permitted without license from IHS
0
//
\
fp \
\
/
1
-1’
-\
‘;
F
\
I-
G
Not for Resale
TABLE 9
--`,,```,,,,````-`-`,,`,,`,`,,`---
See
Notes
3314
4
3%
3’14
3
2%
2’12
2%
1 r/a
2
1%
2.7500
3.0000
3.2500
3.5000
3.7500
4.0000
1.7500
1.8750
2.0000
2.2500
2.5000
1.1250
1.2500
1.3750
1.5000
1.6250
1 ‘I6
1 ‘I4
1318
1 ‘h
1 =/s
1
'la
314
%
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hl
0.5625
0.6250
0.7500
0.8750
1 .oooo
g/m
‘I2
7116
%J
5/16
0.2500
0.3125
0.3750
0.4375
0.5000
or
Major Diam.
of Thread
Size
‘I4
Basic
Nominal
6%
53/4
53t6
5
4’14
4%
3%
3%
3%
2'%6
z3/q
wl6
23hl
2%
1 13/16
2
1 ‘I4
1 ‘he
1%
1'/16
'6/16
‘16
314
"/la
6lre
'12
Basic
Max.
Across
Flats
1
4.250
4.625
5.000
5.375
5.750
5.125
2.750
2.938
3.125
3.500
3.875
1.812
2.000
2.188
2.375
2.562
0.938
1.082
1.250
1.438
1.625
0.500
0.562
0.688
0.750
0.875
Width
F
Min.
4.112
1.475
1.838
5.200
5.562
5.925
2.662
2.844
3.025
3.388
3.750
1.756
1.938
2.119
2.300
2.481
0.909
1.031
1.212
1.394
1.575
0.488
0.546
0.669
0.728
0.859
TABLE 9
2
Min.
4.688
5.102
5.515
5.928
6.341
6.755
3.035
3.242
3.449
3.862
4.275
2.002
2.209
2.416
2.622
2.828
1.037
1.175
1.382
1.589
1.796
‘I32
3YlS
3’116
3”/16
3’%6
26'/64
246,64
1 J'l32
2 '=I64
229f64
127132
123132
1 ‘=I332
1 ‘S/32
I"/32
1
17164
63/g4
%34
%4
%4
35164
=‘I64
27h
%34
’ g/64
==/m
Basic
1.679
1.802
1.925
2.155
2.401
1.079
1.187
1.310
1.433
1.556
0.526
0.587
0.710
0.833
0.950
0.218
0.280
0.341
0.403
0.464
Min.
2.647
2.893
3.124
3.370
3.616
3.862
Nuts
(For additional
2.759
3.013
3.252
3.506
3.760
4.014
1.759
1.886
2.013
2.251
2.505
1.139
1.251
1.378
1.505
1.632
0.568
0.631
0.758
0.885
1.012
0.250
0.314
0.377
0.441
0.504
Max.
Thickness
Heavy Hex
H
'I32
3'152
requirements
m6
2'/l6
1’YlS
1'%6
145104
1 37t64
1 2g/64
1 13/64
13132
1
2%2
27h
25l32
23132
3g/s4
36/64
3'164
37164
2=i~4
"164
"164
17/64
’ =I04
'=I64
'l/64
Basic
refer
1.634
1.763
1.876
2.006
2.134
2.264
to Notes
1.522
1.643
1.748
1.870
1.990
2.112
Hex
p
Nuts
of Bearing
0.071
0.081
0.087
0.094
0.100
0.107
0.048
0.051
0.055
0.061
0.068
General
0.033
0.035
0.038
0.04 1
0.044
0.024
0.025
0.027
0.029
0.031
0.017
0.020
0.02 1
0.022
0.023
up to
150,000
psi
Data
3
0.064
0.070
0.075
0.081
0.087
0.093
0.041
0.044
0.047
0.052
0.058
0.027
0.030
0.033
0.036
0.038
0.017
0.018
0.020
0.022
0.024
0.011
0.012
0.014
0.015
0.016
Max.
150,000
psi and
Greater
Specified
Proof
Load
Heavy
Runout
on p. 22 and
0.579
0.687
0.747
0.808
0.868
0.639
0.751
0.815
0.880
0.944
0.929
0.989
1.050
1.155
1.401
0.307
0.337
0.398
0.458
0.519
0.349
0.381
0.446
0.510
0.575
1.009
1.073
1.138
1.251
1.505
0.156
0.186
0.216
0.247
0.277
Min.
Nuts
0.188
0.220
0.252
0.285
0.317
Max.
Thickness
Heavy Hex Jam
4
OF HEAVY HEX NUTS AND HEAVY HEX JAM NUTS
0.556
0.622
0.763
0.830
0.969
Not for Resale
0.907
5.340
5.774
5.207
5.640
7.073
3.175
3.392
3.808
4.041
4.474
2.093
2.309
2.626
2.742
2.959
1.083
1.227
1.443
1.660
1.876
0.577
0.650
0.794
0.866
1.010
Max.
Width
Across
Corners
G
DIMENSIONS
on pp.
FIM
1 and
0.074
0.081
0.087
0.094
0.100
0.107
0.048
0.051
0.055
0.061
0.068
0.033
0.035
0.038
0.041
0.044
0.024
0.025
0.027
0.029
0.031
0.017
0.020
0.021
0.022
0.023
All
Strength
Levels
2.)
Heavy
Hex
Jam Nuts
Face
ASMElANSl B1 8.2.2-1987
(INCH NUTS HEX
AND
SQUARE
GENERAL NOTES:
(a) Unification. Bold type indicatesproducts unified dimensionally with Britishand Canadian standards. Unification of fine
thread products is limited t o sizes l in. and under.
(b) True Positionof Tapped Hole. The axisof tappedhole shall be located
at true position
with respect to the axis
of
nut body
withina tolerance zone having a diameter equivaacross flats for1 in. nominal size nuts or smaller,
lent t o 4% of the maximum width
and 6% of the maximumwidth across flats for nutslarger than 1h in., regardless of
feature size.
x
(c) Countersink. Tappedhole shall be countersunk on thebearing faceor faces. Themaximum countersink diameter shall be the thread basic (nominal) major diameter plus
0.030 in. for 3/s in. nominal size nuts and smaller, and 1.OB times the basic major
diameter for nutslarger than 3/8 in. No part of thethreaded portion shall projectbeyond the bearing surface.
(dl Threads. Threads shall be unified coarse, fine, or B thread series (UNC, UNF or 8 UN
series), Class 28. Unless otherwise specified, coarse thread series shall be furnished.
(e) Material. Unless otherwise specified, chemical and mechanical properties of steel
nuts shall conform with Grade A of ASTM A 563, Carbon and Alloy Steel Nuts; or
Grade 2 of SAE J995, Mechanical and Material Requirements for Steel Nuts. Nuts of
other materialssuch as corrosion resistant (stainless)steel, brass, bronze, and aluminum alloysshall have properties as agreed upon between the manufacturer
and purchaser. The properties for nutsseveral
of
grades of corrosion resistantsteel alloys are
covered in ASTM F 594, and of several nonferrous materials in the ASTMF 467.
NOTES:
(1 1 Width Across Flats. Maximum widthacross flats shall not be exceeded (see exception in General Data). No transverse action through the
nut between 25% and 75% of
the actual nut thickness
as measured from thebe.aringsurface shall be lessthan the
minimum widthacross flats. For milled-from-bar nuts, see statement in General Data
pertaining to the nominalbar size t o be used.
(2) Corner Fill. A rounding or lack of fill at junction of
hex corners with chamfer shall be
permissible provided thewidth across corners iswithin specified limits at and beyond
a distance equal t o 17.5% of the basic thread diameter from the chamferedfaces.
(3) Tops and Bearing Surfaces of Nuts. Nuts
in sizes 71s in. nominal size and smaller shall
be double chamfered. Larger size nuts shall be double chamfered or have washer
faced bearing surface and chamfered top.
The diameter of chamfer circle ondouble chamfered nuts and diameter of washer
face shall be within the limits of the maximum
across
width
flats and 95% of theminimum widthacross flats.
The tops of washer faced nuts shall beflat and the diameter of chamfer circle
shall
be equal to the maximum width
across flats withina tolerance of 15%. The length
of chamfer at hex corners
shall be from5% t o 1 5% of thebasic thread diameter. The
surface of chamfer may be slightly convex or rounded.
Bearing surfaces shall be flatand, unless otherwise specified, shall be perpendicular to theaxis of the threaded
hole within the FIM limits tabulated for the respective
nut size, type, and strength level. Where purchaser specifies close runout ofbearing
face style heavyhex or heavyhex jam nutsin nominal sizes 2 in. through 4 in., nuts
shall be so processed as t o have a maximum bearing face runout of0.01 O in. FIM.
-
22
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SERIES)
ASMElANSl 818.2.2-1987
SQUARE AND HEX NUTS (INCH SERIES)
--`,,```,,,,````-`-`,,`,,`,`,,`---
(Table 10 begins on following page.)
23
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Not for Resale
S T D - A S M E B L B * Z * Z - E N G L L 9 8 7 m 0759b70ObL773b
OLb M
SQUARE AND HEX NUTS (INCHSERIES)
ASMElANSl B18.2.2-1 987
ö
W
4
m
--`,,```,,,,````-`-`,,`,,`,`,,`---
a
c
24
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Not for Resale
‘la
3%
See
Notes
4
3314
3%
3.2500
3.5000
3.7500
4.0000
2.2500
2.5000
2.7500
3.0000
2%
2%
2%
3
1%
2
I .3750
1.5000
1.7500
2.0000
0.8750
I .oooo
1.1250
I .2500
I 319
I ‘I2
I ‘l&l
I ?I4
1
0.5000
0.5625
0.6250
0.7500
0.2500
0.3125
0.3750
0.4375
Copyright ASME International
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No reproduction or networking permitted without license from IHS
t.i
k
610
YlS
‘I2
‘I16
‘I4
h9
J/s
Size
or
Basic Major Diam.
of Thread
Nominal
6%
5%
53/a
5
3710
4%
4%
3%
3%
2%
23h
2%
2
l’=llS
1%
l%e
l’lle
I ‘I4
‘I@
‘Yl6
314
YlS
“I18
‘I2
BdC
M8X.
Across
Flats
.394
.575
.756
.938
4.838
6.200
5.562
5.925
5.000
5.375
5.750
6.125
1
3.388
3.750
4.112
4.475
2.119
2.300
2.662
3.025
I
I
I
I
0.850
0.909
1.031
1.212
0.466
0.546
0.669
0.728
Min.
3.500
3.875
4.250
4.625
2.188
2.375
2.750
3.125
1.430
1.625
1.812
2.000
0.875
0.936
I .062
1.250
0.500
0.562
0.666
0.750
Width
F
G
DIMENSIONS
Max.
2
Not for Resale
5.774
6.207
6.640
7.073
4.041
4.474
4.907
5.340
2.526
2.742
3.175
3.008
1.660
I .876
2.093
2.309
1.010
1.083
1.227
I.443
5.515
5.928
6.341
6.755
3.862
4.275
4.668
5.102
2.416
2.622
3.035
3.449
1.589
1.796
2.002
2.209
0.969
1.037
1.175
1.382
0.556
0.622
0.763
0.830
Min.
Width
Across
Corners
0.577
0.650
0.794
0.866
TABLE 10
--`,,```,,,,````-`-`,,`,,`,`,,`---
(For additional
37h
3”lla
3%
33118
2%i4
24%
2%4
3.252
3.506
3.760
4.014
2.251
2.505
2.759
3.013
2’3184
13’132
I .378
1.505
I .759
2.013
0.885
1.012
1.139
1.251
0.504
0.568
0.631
0.758
0.250
0.314
0.377
0.441
Max.
1’ ‘A2
1 ‘Hz
I 23132
17132
1 v-34
93144
%4
47164
=%4
35164
3’194
2’164
23h4
’ 9l94
‘%/as
Basic
Thickness
H
requirements
3.124
3.370
3.616
3.862
2.155
2.401
2.647
2.893
1.310
1.433
1.679
1.925
0.833
0.956
I .079
1.187
0.464
0.526
0.587
0.710
0.218
0.280
0.341
0.403
Min.
refer
3
to Notes
2.47
2.72
2.97
3.22
1.67
1.79
2.05
2.23
0.99
1.05
1.24
1.43
0.62
0.72
0.78
0.86
0.34
0.37
0.40
0.49
0.15
0.21
0.24
0.28
Mex.
T
Unslotted
Thickness
OF HEAVY HEX SLOTTED NUTS
0.71
0.71
0.71
0.71
0.52
0.64
0.64
0.71
0.40
0.46
0.52
0.52
0.24
0.30
0.33
0.40
0.18
0.18
0.24
0.24
0.10
0.12
0.15
0.15
Max,
on p. 26 and General
2.41
2.65
2.90
3.15
1.62
1.74
1.99
2.17
0.95
1.01
1.20
1.38
0.59
0.69
0.75
0.83
0.32
0.35
0.38
0.47
0.13
0.19
0.22
0.26
Min.
3
Mill.
Data
0.62
0.62
0.62
0.62
0.43
0.55
0.55
0.62
0.31
0.37
0.43
0.43
0.18
0.24
0.24
0.31
on pp.
0.15
0.15
0.18
0.18
0.07
0.09
0.12
0.12
Width of
Slot
s
1 and
___
4
0.087
0.094
0.100
0.107
2.)
0.061
0.068
0.074
0.08 1
0.038
0.041
0.048
0.055
0.029
0.031
0.033
0.035
0.023
0.024
0.025
0.027
0.017
0.020
0.021
0.022
Max.
Runout
of
Bearing
Surface
FIM
iG
2
io
E
w
_E
2
E;
zz
!z
E
a
i?
I
.$
2
=
X
,I
it
$
ASME/ANSI
987
B18.2.2-1
SERIES)
(INCH
SQUARE
NUTS
AND HEX
TABLE 10 (CONT'D)
GENERAL NOTES:
(a) Unification. Boldtype indicates products unified
dimensionally with British and Canadian standards. Unification of fine thread products is limited
t o sizes l in. and under.
(b) True Position of Tapped Hole. The axis of tapped hole
shall be located at true position
with respect t o t h axis
e o f nut body within a tolerance zone having a diameter equivaacross flats for1Ih in. nominal size nuts or smaller,
lent t o 4% of the maximum width
and 6% of the maximum width
across flats for nutslarger than 1'h in., regardless of
feature size.
(c) Countersink. Tapped hole shall be countersunk on thebearing face. The maximum
countersink diameter shall the
be threadbasic (nominal) major diameter plus 0.030 in.
for 3/8 in. nominal size nuts and smaller, and 1 .O8 times thebasic major diameterfor
nuts larger than 3/a in. No part of the
threaded portion shall project beyond the
bearing
surface.
(d) Threads. Threads shall be unified coarse, fine, or 8 thread series (UNC, UNF or 8 UN
series), Class 2B. Unless otherwise specified, coarsethread series shall be furnished.
(e) Material. Unless otherwise specified, chemical and mechanical properties of steel
nuts shall conform with Grade A of ASTM A 563, Carbon and Alloy Steel Nuts; or
Grade 2 of SAE J995, Mechanical and Material Requirementsfor Steel Nuts. Nuts of
other materials suchas corrosion resistant (stainless)steel, brass, bronze, and aluminum alloys shall have propertiesas agreed upon between the manufacturer
and purchaser. The properties fornuts ofseveral gradesof corrosionresistant steel alloys are
covered in ASTM F 594, and of several nonferrous materials in ASTMF 467.
NOTES:
( 1 1 Width Across Flats. Maximum width across flats shall not beexceeded (see exception in General Data). No transverse section through the
nut between 25%and 7 5 %
of the actualnut thickness as measured from thebearing surface shall be less than
the minimum widthacross flats. For milled-from-bar nuts, see statement in General
Data pertaining to the nominalbar size t o be used.
(2)Corner Fill. A rounding or lack of fill at junction ofhex corners with chamfer shall be
--`,,```,,,,````-`-`,,`,,`,`,,`---
at beyond
permissible provided the width
across cornersis within specified limits and
a distance equal to 17.5% of thebasic thread diameter from the chamferedfaces.
(3) Slots. Slots shallbe normal t o nut flats. Contour of bottom of slots
shall beat manufacturer's option. Requirements for gaging slots are in Appendix I.
(4) Tops and Bearing Surfaces of Nuts. Nuts in sizes '/r6 in. nominal size and smaller shall
be double chamfered. Larger size nuts shall be double chamfered or have washer
faced bearing surface and chamfered top.
The diameter of chamfer circle on double chamfered nutsand diameter of washer
face shall be
within the limits of the maximum
width across flats and 95% of the minimum width across flats.
The top ofwasher faced nutsshall be flatand the diameter of chamfercircle shall
be equal to themaximum widthacross flats withina tolerance of 15%. The length
5% of the basic thread
diameter. The
of chamfer at hex corners shallbe from 5% 1to
surface of chamfer may be slightly convex or rounded.
Bearing surface shall be flat and perpendicular to the axis of the threaded hole
within the FIM limits specified for the
respective strength level.
-
26
Copyright ASME International
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Not for Resale
APPENDIX I
SLOT GAGES AND GAGING FOR SLOTTED NUTS
--`,,```,,,,````-`-`,,`,,`,`,,`---
(This Appendix is not part of ASME/ANSI 618.2.2-1987, and is included for information purposes only.)
The gages specified below
shall be used to determine
the acceptability of the alignment and bottom contours of the slots in slotted nuts in accordance with the
following procedure.
The gaging for slot alignment provides for equal
variations in the location of the cotter pin hole in the
bolt and the location of the slots in the nut.
To inspect the nut, theslotted end of the gage shall
be inserted through the threaded hole from the bearing surface of the nut. The gage pin shall then be inserted into both the
gage slot and thenut slots through
three adjacent faces of the nut, consecutively. Slot
this
alignment shall be considered satisfactory if the gage
pin fits into the slots without interference at all three
gaging positions. The bottom contourshall be acceptable if the gage pin contacts the bottom surfaces of opposite slots during the alignment gaging at all three
positions.
Some deviations from the specified gage plug
diameters D may be necessaryto compensate for variations in the nut thread minor diameter due todifferences in manufacturing practices.
To insure adequate service life, gages and gage pins
shall be suitably hardened.
beyond Contour
be round
and straight for
this length
"II.
1
or
Hole
pin
gage
optional
Gage Pin
Gage
DIMENSIONS OF SLOT GAGES AND GAGE PINS
~~
~~
~
A
B
C
D [Note (111
E
F
G
H
Gage Rug
Diameter
Gage
Pilot
Nominal Size
or
Basic Major Diam.
of Thread
'14
5/16
3h
'/IS
0.2500
0.3125
0.3750
0.4375
.
Gage Gage
Face
Coarse
Hug
Thread
Length Length
Min.
Max.
Min.
0.288
0.316
0.415
0.463
0.110
0.375
0.406
0.180
0.562
Fine
Diameter
Thread
+ 0.000
+ 0.000
-0.001
-0.001
0.150
0.252
0.307
0.200
0.211
0.267
0.500
0.330
0.383
Pilot
k0.005
Gage GageGage
Slot
Pin
Width Diameter
Diameter
+0.002
-0.000
0.196
0.181
0.360
0.345
0.115
Gage
Pin
Length
+o.ooo
-0.002
0.065
0.085
0.115
0.1 15
Min.
0.065
1 .o0
0.085
1 .O6 0.237
0.115
1.19 0.292
1.25
(Table continueson next pagel
27
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale
DIMENSIONS OF SLOT GAGES AND GAGE PINS (CONT'D)
A
Gage
Pilot
Length
B
C
E
F
G
H
Gage
Pilot
Diameter
Gage
Slot
Width
Gage
Pin
Diameter
Gage
- 0.001
f 0.005
+0.002
-0.000
- 0.002
D [Note (111
Gage Plug
Diameter
Length
Gage
Face
Diameter
Coarse
Thread
Fine
Thread
+o.ooo
Max.
Min.
- 0.001
+o.ooo
Min.
0.5000
0.5625
0.6250
0.7500
0.573
0.621
0.731
0.827
0.260
0.280
0.310
0.370
0.625
0.703
O. 78 1
0.938
0.417
0.472
0.527
0.642
0.446
0.502
0.565
0.682
0.402
0.457
0.512
0.627
0.145
0.145
0.175
0.175
0.175
0.175
1.38
1.44
1.56
1.75
0.8750
1.oooc
1.1250
1.2500
0.922
1.O18
1.176
1.272
0.480
0.550
0.600
0.660
1.109
1.250
1.406
1.562
0.755
0.865
0.970
0.798
0.910
1.O35
1.160
0.740
0.850
0.955
1.095
1.O80
0.175
0.235
0.235
0.305
0.175
0.235
0.235
0.305
1.94
2.1 2
2.31
2.50
1.3750
1.5000
1.7500
2.0000
1.399
1.526
1.759
2.01 3
0.770
0.810
1.190
1.370
1.718
1.a75
2.188
2.500
1.195
1.320
1.534
1.759
1.285
1.410
...
...
1.180
1.305
1.519
1.744
0.305
0.365
0.425
0.425
0.305
0.365
0.425
0.425
2.69
2.88
3.25
3.62
2.2500
2.5000
2.7500
3.0000
2.251
2.505
2.759
3.01 3
1.610
1.730
1.980
2.160
2.818
3.125
3.438
3.750
2.009
2.229
2.479
2.729
...
...
...
...
1.994
2.214
2.464
2.714
0.425
0.545
0.545
0.615
0.425
0.545
0.545
0.61 5
4.00
4.38
4.75
5.12
3.2500
3.5000
3.7500
4.0000
3.252
3.506
3.760
4.01 4
2.400
2.640
2.890
3.1 40
4.062
4.375
4.688
5.000
2.979
3.229
3.479
3.729
...
2.964
3.214
3.464
3.714
0.61 5
0.61 5
0.61 5
0.61 5
0.615
0.615
0.61 5
0.61 5
5.50
5.88
6.25
6.62
Nominal Size
or
Basic Major Diam.
of Thread
Gage
Ml
,..
...
...
Pin
Length
+ 0.000
O. 145
O. 145
Min.
NOTE:
to the minimum minor diameters
of Class 28 threads. If the nutsare not threaded with unified
(1) Diameters tabulated are equivalent
the same as the diameter of the GO thread plug gage
for the bore.
coarse (UNQ or fine (UNF) threads,the diameter of gage shall be
28
--`,,```,,,,````-`-`,,`,,`,`,,`---
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale
APPENDIX II
FORMULAS FOR NUT DIMENSIONS
(This Appendix is not part of ASMElANSl 818.2.2-1987, and is included for information purposesonly.)
--`,,```,,,,````-`-`,,`,,`,`,,`---
(Table begins on following page.)
29
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale
Fiat
Jam
Hex
through
4
1112
F =
F=
1.5000
1.5000
F = 1.5000
F=
+0.125
+0.125
0.0500
0.0500
0.0500
0.0150
+ 0.006
+0.006
H = 1 .OOOD
H = 1.0000
H = See Table
H = See Table.
H = See Table
0.015D
+0.062
F = 1.5000
1.5000
H = 0.5000
0.0500
F=
1.5000
H = See Table
H = See Table
H = 0.8750
H = 0.8750
H = 0.8750
H = 0.8750
H = 0.5000
1.5000
+ 0.006
+ 0.006
+0.006
+0.006
H = 0.5000
H = 0.5000
H = 0.8750
H = 0.8750
Nut
+0.094
+0.047
-0.031
- 0.016
+0.125
+0.062
Basic
[Note (2)I
H = 0.0760
APPENDIX II
0.0500
F-
Not for Resale
1% through
Ii4
1 l/2
through
k
510
1 l/z
1 j/a
%6 through
‘14
1 l/4 through
314 through
0.0150
F = 1.5000
5/e
%a through
+ 0.062
0.0150
1.5000
F =
‘I4
0.0500
0.015D
0.015D
0.0500
0.0500
0.0500
0.0500
0.0500
Tolerance
(Minus)
0.0500
1.5000
1.5000
+ 0.062
+0.062
Flats
F = 1.5000
1114
1h
F =
F=
51s
1 I/e
%6 through
% through
1.5000
F = 1.5000
F = I.5000
F =
through
1.5000
F = 1.5000
F-
‘I4
1%
1 l/z
1 l/z
%
Basic
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Hex
Heavy
Flat
‘la
1 % through
1
1 l/s through
3/a through
% through
Nut Size
INote (111
Across
I
Square
Heavy
Hex Thick
and Hex
Thick Slotted
Hex
Hex and
Slotted
Hex Flat
Jam
Hex
Square
Nut Type
Width
I
--`,,```,,,,````-`-`,,`,,`,`,,`---
+ 0.003
+ 0.003
+ 0.003
+0.012
+0.012
+0.003
+ 0.003
+0.012
+0.012
+0.003
+0.003
+0.012
+0.012
+0.012
+ 0.012
0.016D
+0.012
INote (311
0.016D
+0.012
[Note (311
0.015D
0.0150
0.015D
0.016D
0.016D
0.015D
0.015D
0.016D
0.016D
0.015D
0.0150
0.016D
0.016D
0.016D
0.016D
+0.012
Tolerance
(Plus or Minus)
0.016D
Thickness
Max.
I Min.
Max.
I Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
fI
R
R
F)
G = 1.1547
(Max.
G = 1.14 (Min. R
n
G I 1.4142
(Max. Fl
G = 1.373
(Min. fl - 0.030
G = 1.1547
(Max.
G = 1.14 (Min. R
G = 1.1547
(Max.
G = 1.14 (Min. n
G = 1.1547
(Max.
G = 1.14 (Min. n
G = 1.1647
(Max.
G = 1.14 (Min. fl
0
G = 1 .1547
(Max.
G = 1.14 (Min. Fl
Max.
Min.
Corners
G = 1.4142
(Max. fl
G = 1.373
(Min. R - 0.030
Limits
Across
Max.
Min.
Width
Hex
I
I
I
I
I
3
4
2% through
3%
1 I/B
2
1 l/4 through
4
3’14 through
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
~~
size or basic
flats
corners
1.5000
diameter
I
0.0500
0.0500
0.0500
0:0500
0.0500
0.0500
0.0500
minimum
minimum
Not for Resale
upward
thickness
thickness
is equal
is equal
1 .oooo
1 .OOOD
to minimum
to minimum
-0.062
-0.047
-0.031
-0.016
+0.250
+0.125
+0.062
+0.186
+0.203
+0.076
+0.094
iO.047
thickness
thickness
to thirty-seconds.
H = 0.5000
H = 0.5000
H = 0.5000
H = 0.5000
H = 0.5000
H=
H = 1 .OOOO
H=
1.0000
H =
0.0500
H = 0.5000
H = 0.5000
H = 0.5000
0.0500
Nut
Basic
[Note (211
0.0500
0.0500
adjusted
Tolerance
IMinus)
0.0500
Flats
2% in. sizes
Across
--`,,```,,,,````-`-`,,`,,`,`,,`---
of the thread
so that
so that
1 ‘/a through
+0.125
F = 1.5000
+0.125
+0.125
+0.125
+0.125
1.5000
1.5000
1.5000
F = 1.5000
F =
F =
IF=
1.6000
+0.125
F =
I
+0.125
+0.125
1.5000
+0.125
+0.125
+0.125
1 F = 1.5000
I F =
F = 1.5000
F = 1.5000
adjusted
to sixty-fourths.
sixteenths.
Minus tolerance
adjusted
Minus tolerance
adjusted
3
through
114
2%
2
114
through
through
2
2%
1114 through
1% through
NOTES:
(1) Adjusted
to sixteenths.
(2) l/4 through
1 in. sizes
adjusted
upward
to
(3) Plus tolerance
only.
(4) Plus tolerance
only.
where
0 = nominal
nut
F = width
across
G - width across
Heavy
Jam
Heavy Hex
and Heavy
Hex Slotted
Heavy
Hex
Flat Jam
F =
Basic
Width
Tolerance
(Plus or Minus)
of heavy
of heavy
2% through
hex
hex
0.0160
0.0160
0.0160
0.0160
0.0160
0.016D
0.0160
0.0160
0.0160
nut.
jam nut,
4 in. sizes
+0.012
+0.012
+0.012
+0.012
+0.012
+0.012
+0.012
+0.012
+0.012
0.0160
+0.012
[Note (411
0.0160
+0.012
(Note (411
---I
0.0160
+0.012
INote (411
Thickness
Max.
Min.
Max.
Min.
Max.
Min.
Limits
Across
G = 1.1547
(Max.
G = 1.14 (Min. Fl
G = 1.1547
(Max.
G = 1.14 (Min. Fl
Fj
n
Fl
Corners
G = 1.1547
(Max.
G = 1.14 (Min. R
Width
APPENDIX 111
WRENCH OPENINGS APPLICABLE TO SQUARE AND HEX NUTS
(This Appendix is not part of ASMElANSl B1 8.2.2-1
Allowance
Between
Nut Flats
and Jaws
of Wrench
[Note (2)l
Min.
0.4375
0.5000
0.5625
0.6250
0.003
0.004
0.004
0.004
0.6875
0.7500
0.8125
0.8750
[Note 11JI.
Also Basic
(Maximum]width
Across Flats
of Nuts
Square
Nut
Wrench Openings
TOI.
r
lote (211
Max.
0.440
0.504
0.566
0.629
0.006
0.006
0.007
0.007
3.446
3.510
3.573
D.636
0.004
0.005
0.005
0.005
0.692
0.755
0.81 8
0.880
0.007
0.008
0.008
0.008
D.699
0.763
0.826
0.888
...
0.9375
1 .moo
1 .O625
1.1250
0.006
0.006
0.006
0.007
o.944
0.009
0.009
0.009
0.010
0.953
1 .O15
1 .O77
1.142
...
1 .O06
1 .O68
1.132
11/2
1.2500
1.3125
1.4375
1.5000
0.007
0.008
0.008
0.008
1.257
1.320
1.446
1.508
0.010
0.01 1
0.011
0.01 2
1.267
1.331
1.457
1 .520
1%
1 l1I16
1 l3/16
1 '/e
0.009
1.6250
0.009
1.6875
1.81
25 0.010
0.010
1.8750
1 .634
0.012
0.012
0.013
0.013
1.646
1.708
1.835
1.898
2
2l/16
23/16
2%
2.0000
2.0625
2.1875
2.2500
2%
29/16
23/4
2'5/16
2.3750
2.5625
2.7500
2.9375
7/16
9/16
%
Ill16
3/4
'%e
'18
'Y16
1
1 V18
1%
1 l/a
1 %S
l'Il6
Nominal Nut Sizes
...
Y8
31~
...
'12
...
51~
0.014
0.014
0.01 5
0.01 5
2.025
2.088
2.21 5.
2.277
0.013
0.014
0.014
0.01 6
2.388
2.576
2.766
2.954
0.016
0.017
0.017
0.019
2.404
2.593
2.783
2.973
711 6
v2
...
9116
518
...
...
3/4
3/4
...
...
71.3
'le
...
1
...
'14
Y16
...
3/8
7116
...
'h
9/16
YS
3h
...
'18
1
...
1
...
...
1 '/e
1 118
1 l/4
1 114
...
2.01 1
2.074
2.200
2.262
'14
v16
5116
7116
0.011
0.012
0.012
0.01 1
.
1.696
1.822
1.885
Hex Flat,
Hex Flat Jam,
Heavy Square,
Heavy Hex Flat,
Hex,
Heavy Hex Flat Jam,
Hex Jam,
Hex Slotted, Heavy Hex.
Heavy Hex Jam,
,
Hex
Thick,
Heavy Hex Slotted
. Hex Thick Slotted
...
1 '18
...
131~
131~
...
1 'h
1 '12
...
...
...
--`,,```,,,,````-`-`,,`,,`,`,,`---
Nominal Size
of Wrench
987,
and is included for information purposes only.)
...
...
...
..
(Table continueson next pagel
33
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Previous page is blank.
Not for Resale
WRENCH OPENINGS APPLICABLE TO SQUARE AND HEX NUTS(CONT‘DI
3%
3%
3%
4%
4%
5
53h
53h
6.1250
6%
Allowance
Between
Nut Flats
and Jaws
of Wrench
[Note (2)l
3.1250
3.5000
3.8750
4.2500
0.01 7
0.01 9
0.020
4.6250
5.0000
5.3750
5.7500
0.024
0.026
0.028
0.030
0.032
Square
Nut
Wrench Openings
Min.
TOI.
Note (211
0.020
3.142
0.022
3.51 8
0.023
3.895
4.272 0.022
4.649
5.026
5.403
5.780
6.1 57
0.027
0.031
0.033
0.035
Heavy Square.
Heavy HexFlat,
Heavy Hex Flat Jam,
Heavy Hex,
Heavy Hex Jam,
Heavy Hex Slotted
Nominal Nut Sues
Max.
...
3.162
...
3.540
...
3.91 8
4.297 0.025. . .
...
...
...
4.676
...
5.055 0.029
...
5.434
...
5.81 3
...
6.192
...
...
...
...
...
...
...
NOTES:
(1) Wrenches are normally marked with the “Nominal Size of Wrench” which corresponds to the basic (maximum, in most cases)
width across flats dimension of the respective nut. For specific requirements applicable
to wrenches, referto the appropriate ANSI
BIO7 document which covers
the particular wrench type.
+ 0.001 1.
(2) Allowance (minimum clearance) between maximum
width across flats of the nutand jaws of wrench equals (0.005W
Tolerance on wrench opening equals plus(0.005W + 0.004 from minimum),
where
W = nominal sizeof wrench
34
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale
--`,,```,,,,````-`-`,,`,,`,`,,`---
Nominal Size
of Wrench
[Note (1Il,
Also Basic
(Maximuml Width
Across Flats
of Nuts
Hex Flat,
Hex Flat Jam,
Hex,
Hex Jam,
Hex Slotted,
Hex Thick,
Hex Thick Slotted
AMERICAN NATIONAL STANDARDS FOR BOLTS. NUTS. RIVETS. SCREWS.
WASHERS. AND SIMILAR FASTENERS
--`,,```,,,,````-`-`,,`,,`,`,,`---
Small Solid Rivets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.1.1-1 972 (R1983)
818.1.2-1972 (R1983)
Large Rivets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Small Solid Rivets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.1.3M-1983
818.2.1-1 981
Square and Hex Bolts and Screws - Inch Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.2.2-1 987
Square and Hex Nuts(Inch Series). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.2.3.1M-1979
Metric Hex Cap Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.2.3.2M-1979
Metric Formed Hex Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.2.3.3M-1979
Metric Heavy Hex Screws......................................................
818.2.3.4M-1984
Metric Hex Flange Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.2.3.5M-1979
Metric Hex Bolts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Heavy Hex Bolts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.2.3.6M-1979
B1 8.2.3.7M-1979
Metric Heavy Hex Structural Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Hex Lag Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.2.3.8M-1981
Metric Heavy Hex Flange Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.2.3.9M-1984
B1 8.2.4.1M-1 979
Metric Hex Nuts. Style 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Hex Nuts, Style 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.2.4.2M-1979
Metric SlottedHex Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.2.4.3M-1979
B1 8.2.4.4M-1982
Metric Hex Flange Nuts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Hex Jam Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.2.4.5M-1979
B18.2.4.6M-1979
Metric Heavy Hex Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.3-1986
Socket Cap. Shoulder and Set Screws (Inch Series). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.............................................
B1 8.3.1M-1986
Socket Head Cap Screws (Metric Series)
Metric Series Hexagon Keys and Bits
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B18.3.2M-1979 (R19861
B18.3.3M-1986
Hexagon Socket Head Shoulder Screws(Metric Series) ..................................
B1 8.3.4M-1986
Hexagon Socket Button Head Cap Screws (Metric Series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.........................
B1 8.3.5M-1986
Hexagon Socket Flat Countersunk Head Cap Screws (Metric Series)
B1 8.3.6M-1986
Metric Series Socket Set Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head
Round
818.5-1978
.......................................................
Neck
Square
Short
Metric
Head
Round
Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5.2.1
B1 981 M-1
..
B1 8.5.2.2M-1982
Metric Round Head Square NeckBolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
818.6.1-1981
WoodScrews. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slotted Head Cap Screws, Square Head Set Screws. and Slotted Headless
Set Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.6.2-1 972 (R 1983)
B18.6.3-1 972 (R1983)
Machine Screws and Machine Screw Nuts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws
(Inch
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Series)
...............
B18.6.5M-1986
Screws
Tapping
Cutting
Thread
Metric
and
Forming
Thread
...............................
Metric Machine Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.6.7M-1985
General Purpose Semi-Tubular Rivets. Full Tubular Rivets. Split Rivets and Rivet Caps . . . . . . . . 818.7-1972 (R1980)
Metric General Purpose Semi-Tubular Rivets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.7.1M-1984
otter
and
Pins Clevis
8.8.1-1 972 (R1 983)
..................................................
.........
Taper
Pins.
Dowel
Pins,
Straight Pins.
Grooved
Pins,
and
Spring
Pins
(InchSeries)818.8.2-1978
(131983)
Plow Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
818.9-1958 (R19771
B18.10-1982
Track Bolts and Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.11-1 961(R1983)
Miniature Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary of Terms for Mechanical Fasteners
......................................
B18.12-1962 (R1981)
Screw and Washer Assemblies- Sems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818.1 3-1965 (R1983)
Forged Eyebolts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.1 5-1985
Mechanical and Performance Requirements for Prevailing-Torque Type
. Hex FlangeNuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B1 8.16.1M-1979 (R1986)
Steel Metric Hex Nuts and
Torque-Tension Test Requirements for Prevailing-Torque Type
B18.1 6.2M-1979 (R1986)
Steel Metric Hex Nuts and Hex FlangeNuts .................................
Dimensional Requirementsfor Prevailing-Torque Type Steel Metric Hex Nuts
and Hex Flange Nuts... i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.16.3M-1982
Wing Nuts. Thumb Screws. and Wing Screws
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B1 8.17-1968 (R1983)
Inspectionand Quality Assurance for General Purpose Fasteners..........................
B18.1 8.1M-1987
Inspectionand Quality Assurance for High-Volume Machine Assembly
.........
Fasteners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B18.18.2M-1987
Inspection
8.18.3M-1987
Special
Purpose
Assurance
Quality
Fasteners
B1
for
and
...........................
Inspectionand Quality Assurance for Fasteners for Highly Specialized
B18.18.4M-1987
Engineered Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.21.1-1972 (R19831
Lock Washers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Plain Washers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B18.22M-1981
818.22.1-1965 (R1981)
Plain Washers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Beveled Washers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
818.23.1-1967 (R19751
Copyright ASME International
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Not for Resale