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Fasteners
Building Material
Furniture Hardware
Rigging Hardware
Wires and Nails
Auto Parts
Castings
Metal Stampings
Promotion
Self Tapping Screws
Drive Screws Type U
Round Head
Nominal
Screw
Size
Number
Of Thread
Starts
D
A
H
P
Recommened
Hole Size
Outside
Diameter
Head
Diameter
Head
Height
Pilot
Diameter
Drill Size
No.
Hole
Diameter
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
00
0
2
4
6
6
8
7
0.060
0.075
0.100
0.116
0.057
0.072
0.097
0.112
0.099
0.127
0.162
0.211
0.090
0.118
0.146
0.193
0.034
0.049
0.069
0.086
0.026
0.041
0.059
0.075
0.049
0.063
0.083
0.096
0.046
0.060
0.080
0.092
55
51
44
37
0.052
0.067
0.086
0.104
6
7
8
10
7
8
8
8
0.140
0.154
0.167
0.182
0.136
0.150
0.162
0.177
0.260
0.285
0.309
0.359
0.240
0.264
0.287
0.334
0.103
0.111
0.120
0.137
0.091
0.099
0.107
0.123
0.116
0.126
0.136
0.150
0.112
0.122
0.132
0.146
31
29
27
20
0.120
0.136
0.144
0.161
12
14
8
9
0.212
0.242
0.206
0.236
0.408
0.457
0.382
0.429
0.153
0.170
0.139
0.155
0.177
0.202
0.173
0.198
11
2
0.191
0.221
L
Nominal
Screw Length
1/8
3/16
1/4
5/16
3/8
1/2
5/8
3/4
1 in. and
over
S
Pilot Length
0.047
0.047
0.047
0.047
0.062
0.062
0.078
0.078
0.125

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

This type of recess has a squam center opening slightly tapered side walls and a conical bottom.

Nominal Size or Basic Screw Diameter
M
Recess
Square
T
Recess
Depth
Drive
Size
F
Penetration
Gauging Depth
Max
Min.
Min.
Max.
Max.
Min.
3
0.0990
4
0.1120
5
0.1250
6
0.1380
7
0.1510
8
0.1640
10
0.1900
12
0.2160
1/4
0.2500
5/16
0.3125
3/8
0.3750
0.071
0.071
0.091
0.091
0.091
0.1126
0.1126
0.133
0.133
0.191
0.191
0.0696
0.0696
0.090
0.090
0.090
0.111
0.111
0.1315
0.1315
0.1895
0.1895
0.073
0.073
0.113
0.113
0.113
0.140
0.140
0.165
0.165
0.201
0.201
0.063
0.063
0.105
0.105
0.105
0.119
0.119
0.155
0.155
0.191
0.191
0
0
1
1
1
2
2
3
3
4
4
0.038
0.038
0.065
0.065
0.065
0.075
0.075
0.095
0.095
0.100
0.100
0.032
0.032
0.057
0.057
0.057
0.065
0.065
0.085
0.085
0.090
0.090

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
G
H
J
A
M
T
F
N
 
 
Screw
Size
Head
Dimensions
Slot
Dimemsions
Recess
Dimensions
Driver
Size
Head
Diam.
Head
Height
Width
Depth
Width
Depth
Max.
Rad
Min.
Wing
Width
Recess
Penetration
Max.
Min.
Max.
Min.
Max.
Min.
0
.116
.104
.044
.036
--
--
--
--
.067
.054
.039
.021
.010
.013
.032
.014
0
1
.142
.130
.053
.044
--
--
--
--
.074
.061
.045
.025
.010
.014
.040
.022
0
2
.167
.155
.062
.053
.031
.023
.031
.022
.104
.091
.059
.041
.020
.017
.052
.034
1
3
.193
.180
.071
.062
.035
.027
.036
.026
.112
.099
.065
.050
.020
.019
.061
.043
1
4
.219
.205
.080
.070
.039
.031
.040
.030
.122
.109
.078
.060
.020
.019
.071
.053
1
5
.245
.231
.089
.079
.043
.035
.045
.034
.158
.145
.083
.057
.025
.028
.072
.046
2
6
.270
.256
.097
.087
.048
.039
.050
.037
.166
.153
.091
.066
.025
.028
.080
.055
2
7
.296
.281
.106
.096
.048
.039
.054
.041
.176
.163
.100
.075
.025
.029
.089
.064
2
8
.322
.306
.115
.105
.054
.045
.058
.045
.182
.169
.108
.082
.025
.030
.097
.071
2
10
.373
.357
.133
.122
.060
.050
.068
.053
.199
.186
.124
.100
.025
.031
.113
.089
2
12
.425
.407
.151
.139
.067
.056
.077
.061
.259
.246
.141
.115
.030
.034
.124
.098
3
1/4
.492
.473
.175
.162
.075
.064
.087
.070
.281
.268
.161
.135
.030
.036
.144
.118
3
5/16
.615
.594
.218
.203
.084
.072
.106
.085
.350
.337
.193
.169
.035
.059
.173
.149
4
3/8
.740
.716
.261
.244
--
--
--
--
.389
.376
.233
.210
.035
.065
.213
.190
4
7/16
.863
.838
.304
.286
--
--
--
--
.413
.400
.259
.234
.035
.068
.239
.214
4
1/2
.987
.958
.348
.327
--
--
--
--
.435
.422
.280
.255
.035
.071
.260
.235
4

This type of recess has a square center opening, slightly tapered side walls and a conical bottom.

Nominal
Size or Basic Screw
Diameter
H
R
M
T
Driver
Size
P
Head
Height
Head
Radius
Recess
Square
Recess
Depth
Penetration
Gauging Depth
Max
Min
Min
Max
Min
Max
Min
Max
Min
3
0.0990
4
0.1120
5
0.1250
6
0.1380
0.078
0.086
0.095
0.103
0.067
0.075
0.083
0.091
0.010
0.010
0.015
0.015
0.071
0.071
0.091
0.091
0.0696
0.0696
0.090
0.090
0.073
0.073
0.113
0.113
0.063
0.063
0.105
0.105
0
0
1
1
0.038
0.038
0.065
0.065
0.032
0.032
0.057
0.057
7
0.1510
8
0.1640
10
0.1900
12
0.2160
0.111
0.120
0.137
0.153
0.099
0.107
0.123
0.139
0.015
0.015
0.020
0.025
0.091
0.112
0.112
0.133
0.090
0.111
0.111
0.1315
0.113
0.140
0.140
0.165
0.105
0.119
0.119
0.155
1
2
2
3
0.065
0.075
0.075
0.095
0.057
0.065
0.065
0.085
1/4
0.2500
5/16
0.3125
3/8
0.3750
0.175
0.216
0.256
0.160
0.198
0.237
0.035
0.040
0.040
0.133
0.191
0.191
0.1315
0.1895
0.1895
0.165
0.201
0.201
0.155
0.191
0.191
3
4
4
0.095
0.100
0.100
0.085
0.090
0.090

Screw
Size
Head Dimensions
Recess Dimensions
D
H
R
G
(Fallaway)
Penetration
Head
Diameter
Head
Height
Ref.
Gage
Penetration
Max.
Min.
Max.
Min.
Min.
Max.
4
6
8
10
.219
.270
.322
.372
.205
.256
.306
.357
.080
.097
.115
.133
.070
.087
.105
.122
.111
.132
.155
.178
.035
.045
.055
.070
.016
.020
.025
.025

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.
4
6
8
10
1/4
5/16
3/8
.257
.321
.384
.448
.573
.698
.823
.241
.303
.364
.425
.546
.666
.787
.069
.086
102
.118
.150
.183
.215
.059
.074
.088
103
133
162
.191
--
.048
.054
.060
.075
.084
.094
--
.039
.045
.050
.064
.072
.081
--
.050
.058
.068
.087
.106
.124
--
.037
.045
.05, 3
.070
.085
.100
.112
.158
.173
.188
.263
.352
--
.099
145
.160
.175
.250
.339
--
.069
.084
.099
.115
.143
.193
--
.017
.027
.029
.030
.033
.059
--
1
2
2
2
3
4
--

Nominal Size or
Basic Screw Diameter
Threads
per Inch
D
d
L
Major
Diameter
Minor
Diameter
These Lengths or Shorter Have AB Threads
Max.
Min.
Max.
Min.
90°
Heads
Csk
Heads
6
0.139
7
0.155
8
0.165
10
0.192
12
0.218
14
0.252
20
0.330
24
0.385
18
16
15
12
11
10
9
9
0.141
0.158
0.168
0.194
0.221
0.254
0.333
0.390
0.136
0.152
0.162
0.188
0.215
0.248
0.327
0.383
0.102
0.114
0.123
0.133
0.162
0.185
0.234
0.291
0.096
0.108
0.116
0.126
0.155
0.178
0.226
0.282
1/4
5/16
3/8
3/8
7/16
1/2
11/16
3/4
5/16
3/8
7/16
1/2
9/16
5/8
13/16
1

Nominal Size or
Basic Screw Diameter
Threads
per Inch
D
d
L
Major
Diameter
Minor
Diameter
These Lengths or Shorter Have AB Threads
Max.
Min.
Max.
Min.
90°
Heads
Csk
Heads
4
0.1120
6
0.1380
8
0.1640
10
0.1900
12
0.2160
1/4
0.2500
5/16
0.3125
3/8
0.3750
24
20
18
16
14
14
12
12
0.114
0.139
0.188
0.189
0.215
0.246
0.315
0.380
0.110
0.135
0.161
0.183
0.209
0.240
0.306
0.371
0.086
0.104
0.122
0.141
0.164
0.192
0.244
0.309
0.082
0.099
0.116
0.135
0.157
0.185
0.236
0.299
3/16
7/32
9/32
21/64
3/8
13/32
5/8
3/8
7/32
17/64
21/64
3/8
13/32
15/32
3/4
29/32

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

Type High-Low
Self Tapping Screws

Nominal Diameter
and Thread
D
B
P
Head Size
High
Thread Diameter
Low
Thread Diameter
Point Diameter
4-24
.105-.115
.086
.061-070
3
6-19
.135-.145
.108
.080-.090
5*
8-18
.160-.170
.130
.095-.105
6
10-16
.185-.195
.145
.099-.110
8
1/4-15
.250.260
.200
.161-175
1/4

Pan Head
Nominal
Size
A
H
M
G
Phillips
Driver Size
Diameter of Head
Height of Head
Dimensions of Recess
Recessed
Diameter
Depth
Max
Min.
Max
Min.
Max
Min.
Max
Min.
4*
.193
.180
.071
.062
.112
.099
.062
.053
1
6
.254
.240
.097
.087
.158
.145
.072
.046
2
8
.270
.256
.097
.087
.166
.153
.080
.055
2
10
.322
.306
.115
.105
.182
.169
.097
.071
2
1/4
.492
.473
.175
.162
.259
.246
.144
.118
3
Hex Washer Head
Nominal Size
A
W
H
F
U
Width
Across Flats
Width
Across
Corners
Height of
Head
Diameter of
Washer
Thickness of
Washer
Max.
Min.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
4
.125
.120
.134
.055
.044
.177
.163
.016
.010
6
.188
.181
.202
.070
.058
.260
.240
.025
.015
8
.250
.244
.272
.093
.080
.328
.302
.025
.015
10
.250
.244
.272
.110
.096
.348
.322
.031
.019
Wing Screws
Basic
Screw
Dia.
Thrd per Inch
S
H
W
d
D
G
T
L
Wing Spread
Wing Hght
Wing Thick.
Shank
Dia.
Shank Dia.
Hght
Stock Thick.
Practical Screw Lngth
Max
Min.
Max
Min.
Max
Min.
Max
Min.
Max
Min.
Max
Min.
Max
Min.
Max
Min.
8
10
1/4
5/16
32
24
20
18
0.78
0.90
1.09
1.31
0.72
0.84
1.03
1.25
0.40
0.46
0.46
0.62
0.34
0.40
0.40
0.56
0.18
0.21
0.26
0.29
0.12
0.15
0.20
0.23
0.35
0.35
0.47
0.57
0.31
0.31
0.43
0.53
0.40
0.53
0.61
0.68
0.34
0.47
0.55
0.62
0.21
0.22
0.24
0.29
0.14
0.16
0.18
0.23
0.04
0.04
0.04
0.07
0.03
0.03
0.03
0.05
0.75
1.00
1.50
1.50
0.38
0.38
0.50
0.50

Hex Washer Slotted

Self Piercing Screws

Size
A
W
H
F
U
J
T
D
d
Width
Across Flats
Width
Across
Corner
Head Height
Washer Diam.
Washer Thickness
Slot Width
Slot Depth
Major Diam.
Minor Diam.
Max.
Min.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
6-18
7-16
8-15
10-12
.250
.250
.250
.258
.244
.244
.244
.244
.272
.272
.272
.272
.093
.093
.110
.110
.080
.080
.096
.096
.328
.328
.348
.414
.302
.302
.322
.384
.025
.029
.031
.031
.015
.017
.019
.019
.048
.048
.054
.054
.039
.039
.045
.045
.053
.062
.074
.074
.033
.040
.052
.052
.141
.158
.168
.194
.136
.152
.162
.188
.102
.114
.123
.133
.096
.108
.116
.126

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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