Evansville, IN
Jasper, IN
Vincennes, IN
812-477-0077
812-482-5105
812-882-4090
Henderson, KY
Owensboro, KY
Mt. Vernon, IL
270-830-0077
270-684-0877
618-244-7156
Fastener Hole Guide
Call EBN for Drill Bits & Taps
Drill This
Size Hole
Drill
Size
60
59
58
57
56
3/64
55
54
53
1/16
52
51
50
49
48
5/64
47
46
45
44
43
42
3/32
41
40
39
38
37
36
7/64
35
34
33
32
31
1/8
30
29
28
Dec.
Equiv.
.0400
.0410
.0420
.0430
.0465
.0469
.0520
.0550
.0595
.0625
.0635
.0670
.0700
.0730
.0760
.0781
.0785
.0810
.0820
.0860
.0890
.0935
.0937
.0960
.0980
.0995
.1015
.1040
.1069
.1094
.1100
.1110
.1130
.1160
.1200
.1250
.1285
.1360
.1405
To Tap
For This
Size Bolt
Or Screw
For This
Size
Wood
Screw
Pilot
In Hard
Wood
Drill This
Size Hole
Drill
Size
9/64
27
26
25
24
23
5/32
22
21
20
19
18
11/64
17
16
15
14
13
3/16
12
11
10
9
8
7
13/64
6
5
4
3
7/32
2
1
A
15/64
B
C
D
1/4
0 x 80
1 x 56
1 x 64 - 72
No. 3
No. 4
2 x 56 - 64
No. 5
3 x 48
3
4
4
4
x
x
x
x
No. 6
56
36
40
48
No. 7
5 x 36
No. 8
5 x 40
5 x 44
No. 9
6 x 32
6 x 36
6 x 40
No. 10
No. 11
7 x 36
8 x 30
8 x 32 x 36
8 x 40
No. 12
Type A
Nominal
Screw
Size
6-18
7-16
8-15
10-12
12-11
14-10
20-9
24-9
440
9 x 30
3/16 x 24
10 x 24
No. 14
10 x 28
10 x 30
10 x 32
3/16 x 32
No. 16
12 x 24
12 x 28
12 x 32
No. 18
14 x 20
1/4 x 20
1/4 x 24
1/4 x 28
1/4 x 32
No. 20
No. 24
Self-Tapping Screws
Suggested Hole Sizes
For Types AB - B - 25
Suggested Hole Sizes
For Type A
Closet Drill
Size to Mean
Hole Diameter
Drill Size
Hole Diam.
#32
0.1160
#30
0.1285
#29
0.1360
#21
0.1590
3/16
0.1875
5.5 mm
0.2165
L
0.2900
11/32
0.3438
Dec.
Equiv.
.1406
.1440
.1470
.1495
.1520
.1540
.1562
.1570
.1590
.1610
.1660
.1695
.1719
.1730
.1770
.1800
.1820
.1850
.1875
.1890
.1910
.1935
.1960
.1990
.2010
.2031
.2040
.2055
.2090
.2130
.2187
.2210
.2280
.2340
.2344
.2380
.2420
.2460
.2500
To Tap
For This
Size Bolt
Or Screw
For This
Size
Wood
Screw
Pilot
In Hard
Wood
Type AB
Type 25
Type B
Nominal
Screw
Size
2-32
3-28
4-24
5-20
6-20
7-19
8-18
10-16
12-14
1/4-14
5/16-12
3/8-12
Hole Diameter
Max
.077
.090
.103
.114
.124
.138
.148
.170
.194
.226
.289
.356
Mean
.072
.084
.096
.107
.116
.129
.138
.159
.182
.211
.270
.333
Min.
.067
.078
.089
.100
.108
.120
.128
.148
.169
.196
.251
.310
Closet Drill
Size to Mean
Hole Diameter
Drill Size
Drill Diam.
49
.073
45
.082
41
.096
36
.1056
32
.116
30
.1285
29
.136
21
.159
14
.182
4
.209
I
.272
Q
.332
Visit us on the WEB @ EBNinc.com
Drill This
Size Hole
Drill
Size
E
F
G
17/64
H
I
J
K
9/32
L
M
19/64
N
5/16
O
P
21/64
Q
R
11/32
S
T
23/64
U
3/8
V
W
25/64
X
Y
13/32
Z
27/64
7/16
29/64
15/32
31/64
1/2
Dec.
Equiv.
.2500
.2570
.2610
.2656
.2660
.2720
.2770
.2810
.2812
.2900
.2950
.2969
.3020
.3125
.3160
.3230
.3281
.3332
.3390
.3437
.3480
.3580
.3594
.3680
.3750
.3770
.3860
.3906
.3970
.4040
.4062
.4130
.4219
.4375
.4531
.4687
.4844
.5000
To Tap
For This
Size Bolt
Or Screw
5/16 x 18
5/16 x 18*
5/16 x 24
5/16 x 24 - 32*
3/8 x 16 - 1/8*P
3/8 x 20 - 24
7/16 x 14
7/16 x 20
1/2 x 12 - 13
1/4" Pipe
1/2 x 20 - 24
1/2 x 27
9/16 x 12
Notes Regarding Hole
Preparation:
• Preformed holes can be
drilled, cored, punched,
pierced or extruded. If
edge burrs can cause
assembly difficulty, they
should be removed.
Wall ovality and/or
taper can affect load
carrying abillity
• “Minimum torsional
strength” is the torque
that free standing
screws must accept
without evidence of
damage or failure
Evansville, IN
Jasper, IN
Vincennes, IN
812-477-0077
812-482-5105
812-882-4090
Henderson, KY
Owensboro, KY
Mt. Vernon, IL
Self-Tapping Screws
270-830-0077
270-684-0877
618-244-7156
(Cont.)
Tpes 1, 23, F, U and High-Low
Suggested Hole Sizes
For Types 1, 23 & F
Thread Cutting Screws
Suggested Hole Sizes
For Type U Drive Screws
Type U
Drive Screw
Type 1
Screw
Size
00
0
2
4
6
7
8
10
12
14
Type F
Type 23
Nominal
Screw
Size
2-56
4-40
6-32
8-32
10-24
10-32
12-24
1/4-20
5/16-18
3/8-16
Hole Diameter
Max
0.078
0.100
0.123
0.150
0.170
0.177
0.198
0.228
0.289
0.349
Mean
0.076
0.097
0.119
0.146
0.165
0.172
0.192
0.221
0.281
0.339
Min.
0.074
0.094
0.115
0.141
0.160
0.167
0.186
0.214
0.273
0.329
Closet Drill
Size to Mean
Hole Diameter
Drill Size
Drill Diam.
48
0.076
41
0.096
31
0.120
20
0.147
19
0.166
11/64
0.1719
11
0.191
2
0.221
K
0.281
R
0.339
“I knew I was an unwanted baby when I
saw that my bath toys were a toaster and a
radio.”
—Joan Rivers
“I was so ugly when I was born the doctor
slapped my mother.”
—Rodney Dangerfield
“I’m so damned unlucky that if I died and
got reincarnated, I’d probably come back
as myself.”
—Freddy Fender
Drill Size No.
55
51
44
37
31
29
27
20
11
2
Hole Diameter
.052
.067
.086
.104
.120
.136
.144
.161
.191
.221
Suggested Hole Sizes
For Type High-Low Screws
HighLow
Screw
Size
2-32
4-24
5-20
6-19
8-18
10-16
12-16
1/4-15
Pilot Hole Diameter
Flexural Modulus of Plastic
Up to 200,000
200,000 - 400,000
P.S.I.
P.S.I.
.0670
.0700
.0810
.0860
.0935
.0995
.1015
.1100
.1200
.1285
.1360
.1440
.1570
.1650
.1890
.2010
“America’s health care system is second
only to Japan...Canada, Sweden, Great
Britain...well, all of Europe. But you can
thank your lucky stars we don’t live in
Paraguay!”
—Homer Simpson
“Dear Lord, the gods have been good to
me. As an offering, I present these milk
and cookies. If you wish me to eat them
instead, please give me no sign whatsoever...Thy will be done.”
—Homer Simpson
Visit us on the WEB @ EBNinc.com
441
Evansville, IN
Jasper, IN
Vincennes, IN
812-477-0077
812-482-5105
812-882-4090
Henderson, KY
Owensboro, KY
Mt. Vernon, IL
270-830-0077
270-684-0877
618-244-7156
Thread Cutting and Rolling Machine Screw
Points
Type A
Type AB
Type B
Self-Drilling
"TEKS"
D
Type 1
Type F
Type C
BT
Type 25
T
Type 23
Type U
Type 17
Self
Drilling
Hole & Drill Size Recommendations For Other Than Type “A”
Thickness
Nominal
Screw
Size
2
3
4
5
6
7
8
10
12
14
1/4
16
18
5/16
20
24
3/8
7/16
1/2
O.D.
Gage
18
18
18
18
14
14
14
1/8
1/8
1/8
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
Type AB, A
B, BP and C
Inch
Size
Max.
Min.
0.0500 0.0460
0.0500 0.0460
0.0500 0.0460
0.0500 0.0460
0.0770 0.0730
0.0770 0.0730
0.0770 0.0730
0.1270 0.1230
0.1270 0.1230
0.1270 0.1230
0.1905 0.1845
0.1905 0.1845
0.1905 0.1845
0.1905 0.1845
0.1905 0.1845
0.1905 0.1845
0.1905 0.1845
0.1905 0.1845
0.1905 0.1845
Types D or 1
F, G and T
Max.
0.0800
0.0960
0.1110
0.1110
0.1425
0.1420
0.1905
0.1905
0.2530
0.3155
0.3780
-
Min.
0.0760
0.0920
0.1070
0.1070
0.1385
0.1380
0.1845
0.1845
0.2470
0.3095
0.3720
-
Types AB
B and BP
Drill
Hole
Size
Dia.
#48
0.0760
#46
0.0810
#44
0.0860
#36
0.1065
#32
0.1160
#30
0.1285
#29
0.1360
#21
0.1590
3/16
0.1875
5.5mm
0.2165
1
0.2720
21/64
0.3281
13/32
0.4062
15/32
0.4688
Hole Size
Type C
Coarse
Fine
Thread
Thread
Drill
Hole
Drill
Hole
Size
Dia.
Size
Dia.
#48
0.0760
#48
0.0760
#44
0.0860
#43
0.0890
#41
0.0960
#40
0.0960
#35
0.1100
#35
0.1100
#31
0.1200
1/8
0.1250
#27
0.1440
#26
0.1470
#19
0.1660
11/64
0.1719
#11
0.1910
#10
0.1935
7/32
0.2188
1
0.2280
J
0.2770
L
0.2900
R
0.3390
11/32
0.3438
-
Head Styles
Flat 82°
Oval
F, G and T
Coarse
Thread
Drill
Hole
Size
Dia.
#49
0.0730
#46
0.0810
#41
0.0960
#37
0.1040
#31
0.1200
#26
0.1470
#17
0.1730
#8
0.1990
1
0.2280
L
0.2900
T
0.3580
-
Types D or 1
Fine
Thread
Drill
Hole
Size
Dia.
#16
0.1770
A
0.2340
M
0.2950
T
0.3580
-
Driving Recesses
Supadriv
Pan
Slotted
Frearson
Torx
One-Way
Slotted
Hex/Hex
Washer
Phillips
Phillips
Slotted
Combination
Indented
Hex
Square
(Robertson)
Spanner
Clutch
Indented Hex
Flat Undercut
Round
Truss
Hexagon Washer
Flat 100°
442
Binding
Fillister
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