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Fasteners
Building Material
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Rigging Hardware
Wires and Nails
Auto Parts
Castings
Metal Stampings
Promotion
Thread Cutting Screws

Nominal Size
A
H
J
T
M
G
N
Phillips
Driver Size
Head Diameter
Height of Head
Width of Slot
Depth of Slot
Dimensions of Recess
Diameter
Depth
Width
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
2
4
5
6
7*
8
9*
10
12
14*
1/4
5/16
3/8
1/2
.172
.225
.252
.279
.305
.332
.358
.385
.438
.491
.507
.635
.762
.875
147
.195
.220
.244
.268
.292
.316
.340
.389
.437
.452
.568
.685
775
.051
.067
.075
.083
.091
.100
.108
.116
.132
.148
.153
.191
.230
.223
.040
.055
.062
.069
.076
.084
.091
.098
.112
.127
.131
.165
.200
.198
.031
.039
.043
.048
.048
.054
.054
.060
.067
.075
.075
.084
.094
.106
.023
.031
.035
.039
.039
.045
.045
.050
.056
.064
.064
.072
.081
.091
.023
.030
.034
.038
.041
.045
.049
.053
.060
.068
.070
.088
.106
.103
.015
.020
.022
.024
.027
.029
.032
.034
.039
.044
.046
.058
.070
.065
.102
.128
.154
.174
.182
.189
.258
.204
.268
.283
.283
.365
.393
.424
.089
.115
.141
.161
.169
.176
.245
.191
.255
.270
.270
.352
.380
.411
.063
.089
.086
.106
.114
.121
.146
.136
.156
.171
.171
.216
.245
.276
.017
.018
.027
.029
.030
.031
.034
.032
.036
.039
.035
.061
.065
.069
1
1
2
2
2
2
2
2-3*
3
3
3
4
4
4

Screw
Size
G
T
B
F
 
Drive
Size
Head Dimensions
Recess Dimension
Max. Sharp
Abs. Min.
Ref.
Ref.
Gauge
Penetration Mm.
(Fallaway)
Max.
Penetration Of No-Go Gage
1/4
(.250)
5/16
(.312)
.507
.635
.452
.566
.153
.191
.221
.266
.060
.087
.030
.030
130
T40

Nominal
Size
A
H
M
G
N
Phillips
Driver
Size
Head Diameter
Height
Of
Head
Ref.
Dimensions of Recess
Max.
Edge
Sharp
Min.
Edge
Rounded
or Flat
Diameter
Depth
Width
Max.
Min.
Max.
Min.
Min.
4
6
8
10
14
0.225
0.279
0.332
0.385
0.507
0.191
0.238
0.285
0.333
0.442
0.049
0.060
0.072
0.083
0.110
0.117
0.154
0.169
0.184
0.247
0.104
0.141
0.156
0.171
0.234
0.078
0.086
0.101
0.116
0.135
0.062
0.063
0.078
0.093
0.112
0.018
0.027
0.028
0.030
0.033
1
2
2
2
3

Hex Head
Hex Washer Head

Nominal
Size
A
W
H
F
U
J
T
Width
Across
Flats
Width
Across
Corners
Height
of
Head
Diameter
of
Washer
Thickness
of
Washer
Width
of
Slot
Depth
of
Slot
Max.
Min.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
4
6
7
8
10
12
14
1/4
5/16
3/8
.187
.250
.250
.250
.312
.312
.438
.375
.500
.562
.181
.244
.244
.244
.305
.305
.428
.367
.489
.551
.202
.272
.272
.272
.340
.340
.409
.409
.545
.614
.060
.093
.093
.110
.120
.155
.190
.190
.230
.295
.049
.080
.080
.096
.105
.139
.172
.172
.208
.270
.243
.328
.328
.348
.414
.432
.520
.520
.676
.780
.225
.302
.302
.322
.384
.398
.480
.480
.624
.720
.019
.025
.029
.031
.031
.039
.050
.050
.055
.063
.011
.015
.017
.019
.019
.022
.030
.030
.035
.037
.039
.048
.048
.054
.060
.067
.075
.075
.084
.094
.031
.039
.039
.045
.050
.056
.064
.064
.072
.081
.042
.053
.062
.074
.080
.103
.111
.111
.134
.168
.025
.033
.040
.052
.057
.077
.083
.083
100
.131

Nominal
Size
A
H
O
J
T
M
G
N
Phillips
Driver
Size
Head Diameter
Height of Head
Width of Slot
Depth of Slot
Dimensions of Recess
Side Height
Total Height
Diameter
Depth
Width
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
4
5*
6
8
9*
10
12
14*
1/4
.225
.252
.279
.332
.358
.385
.438
.491
.507
.195
.220
.244
.292
.316
.340
.389
.452
.452
.067
.075
.083
.100
.108
.116
.132
.148
.153
.054
.062
.069
.084
.091
.098
.112
.127
.131
.104
.116
.128
.152
.164
.176
.200
.224
.232
.084
.095
.105
.126
.137
.148
.169
.190
.197
.039
.043
.048
.054
.054
.060
.067
.075
.075
.031
.035
.039
.045
.045
.050
.056
.064
.064
.059
.067
.074
.088
.095
.103
.117
.132
.136
.049
.055
.060
.072
.078
.084
.096
.108
.112
.136
.158
.178
.192
.216
.209
.270
.305
.290
.123
.145
.165
.179
.203
.196
.257
.292
.277
.094
.085
.105
.119
.144
.137
.152
.188
.173
.019
.028
.030
.031
.034
.033
.038
.042
.040
1
2
2
2
2
2-3*
3
3
3

Nominal
Size
A
H
H1
J
T
M
G
N
Phillips
Driver
Size
Head Diameter
Height of Head
Width of Slot
Depth of Slot
Dimensions of Recess
Slotted
Recessed
Diameter
Depth
Width
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
2
3
4
5
6
7
8
10
12
1/4
5/16
3/8
.167
.193
.219
.245
.270
.296
.322
.373
.425
.492
.615
.740
.155
.180
.205
.231
.256
.281
.306
.357
.407
.473
.594
.716
.053
.060
.068
.075
.082
.089
.096
.110
.125
.144
.178
.212
.045
.051
.058
.065
.072
.079
.085
.099
.112
.130
.162
.195
.062
.071
.080
.089
.097
.106
.115
.133
.151
.175
.218
.261
.053
.062
.070
.079
.087
.096
.105
.122
.139
.162
.203
.244
.031
.035
.039
.043
.048
.048
.054
.060
.067
.075
.084
.094
.023
.027
.031
.035
.039
.039
.045
.050
.056
.064
.072
.081
.031
.036
.040
.045
.050
.054
.058
.068
.077
.087
.106
.124
.022
.026
.030
.034
.037
.041
.045
.053
.061
.070
.085
.100
.104
.112
.122
.158
.166
.176
.182
.199
.259
.281
.350
.389
.091
.099
.109
.145
.153
.163
.169
.186
.246
.268
.337
.376
.059
.068
.078
.083
.091
.100
.108
.124
.141
.161
.193
.233
.017
.019
.019
.028
.028
.029
.030
.031
.034
.036
.169
.210
1
1
1
2
2
2
2
2
3
3
4
4

Threads For Self Tappings Screws

Nominal Size or
Basic Screw Diameter
Threads
per
Inch
D
d
P
S
L
Major
Diameter
Minor
Diameter
Point
Diameter
Point Taper Length
Determinant
Length for
Point Taper
Minimum Practical
Screw Length
For Short Screws
For Long Screws
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
90°
Heads
Csk Heads
90°
Heads
Csk Heads
2
0.0860
4
0.1120
6
0.1380
8
0.1640
10
0.1900
12
0.2160
14
0.2500
5/16
0.3125
3/8
0.3750
32
24
20
18
16
14
14
12
12
0.088
0.114
0.139
0.166
0.189
0.215
0.246
0.315
0.380
0.084
0.110
0.135
0.161
0.183
0.209
0.240
0.306
0.371
0.064
0.086
0.104
0.122
0.141
0.164
0.192
0.244
0.309
0.060
0.082
0.099
0.116
0.135
0.157
0.185
0.236
0.299
0.058
0.079
0.095
0.112
0.130
0.152
0.179
0.230
0.293
0.054
0.074
0.089
0.106
0.123
0.145
0.171
0.222
0.285
0.062
0.083
0.100
0.111
0.125
0.143
0.143
0.167
0.167
0.047
0.063
0.075
0.083
0.094
0.107
0.107
0.125
0.125
0.078
0.104
0.125
0.139
0.156
0.179
0.179
0.196
0.196
0.062
0.083
0.100
0.111
0.125
0.143
0.143
0.161
0.161
7/64
3/16
1/4
5/16
3/8
7/16
1/2
15/32
17/32
3/16
1/4
5/16
7/16
1/2
9/16
5/8
19/32
11/16
7/64
9/64
11/64
3/16
15/64
9/32
9/32
27/32
15/16
5/32
3/16
1/4
1/4
5/16
3/8
3/8
31/32
1 1/8
Threads and Points for Thread Cutting Screws and Self-Tapping Screws
Nominal Size or
Basic Screw Diameter
Threads
per
Inch
D
P
S
L
Major
Diameter
Point
Diameter
Point Taper Length
Determinant
Length for
Point Taper
Minimum Practical
Screw Length
For Short Screws
For Long Screws
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
90°
Heads
Csk Heads
90°
Heads
Csk Heads
2
0.0860
4
0.1120
6
0.1380
56
40
32
0.0860
0.1120
0.1380
0.0813
0.1061
0.1312
0.068
0.087
0.107
0.061
0.078
0.096
0.062
0.088
0.109
0.045
0.062
0.078
0.080
0.112
0.141
0.062
0.088
0.109
5/32
7/32
1/4
3/16
1/4
5/16
5/32
3/16
1/4
3/16
1/4
5/16
8
0.1640
10
0.1900
10
0.19000
32
24
32
0.1640
0.1900
0.1900
0.1571
0.1818
0.1831
0.132
0.148
0.158
0.122
0.135
0.148
0.109
0.146
0.109
0.078
0.104
0.078
0.141
0.188
0.141
0.109
0.146
0.109
1/4
11/32
1/4
11/32
7/16
11/32
1/4
5/16
1/4
5/16
13/32
5/16
12
0.2160
14
0.2500
5/16
0.3125
3/8
0.3750
24
20
18
16
0.2160
0.2500
0.3125
0.3750
0.2078
0.2408
0.3026
0.3643
0.174
0.200
0.257
0.312
0.161
0.184
0.239
0.293
0.146
0.175
0.194
0.219
0.104
0.125
0.139
0.156
0.188
0.225
0.250
0.281
0.146
0.175
0.194
0.219
11/32
13/32
15/32
1/2
7/16
17/32
19/32
11/16
5/16
3/8
7/16
15/32
13/32
1/2
9/16
5/8

Machine Screws

Nominal Screw Size
O thru l2
1/4 thru 3/4
Nominal Screw Length
Tolerance on Length
Up to 1/2 in., Incl.
Over 1/2 to 1 in., Incl.
Over 1 to 2 in., Incl.
Over 2 in.
-0.02
-0.03
-0.06
-0.09
-0.03
-0.03
-0.06
-0.09

Type A - AB

Nominal Screw Length
Tolerance on Length
Up to 1 in., Incl.
Over 1 in.
+ 0.03
+ 0.05
Type B, F, H-L 1,
25 and 23
 
 
Nominal Screw Length
Tolerance on Length
Up to 3/4 in., Incl.
Over 3/4 to 1-1/2 in., Incl.
- 0.03
- 0.05
Type U

 

 

Nominal Screw Length
Tolerance on Length
Up to 3/8 in., Incl.
Over 3/8 in.
+ 0.02
+ 0.03

Wood Screws

 

Nominal Screw Length
Tolerance on Length
Up to 5/8in., Incl.
Over 5/8 to l-1/2 in., Incl.
Over l-1/2 to 2-3/4 in., Incl.
Over 2-3/4 to 5 in., Incl.
-0.03
-0.05
-0.06
-0.09
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