L-36.com

Screw Head Dimensions


Binding Head Undercut

Nominal Size A F O J T U X
Head Dia. Height of Head Width of Slot Depth of Slot Dimensions of Undercut
Hgt. of Oval Total Hgt. Diameter Depth
Max. Min.. Max. Min.. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min..
2
3
4
5
6
8
10
1/4
.181
.208
.235
.263
.290
.344
.399
.513
.171
.197
.223
.249
.275
.326
.378
.488
.018
.022
.025
.029
.032
.039
.045
.061
.013
.016
.018
.021
.024
.029
.034
.046
.050
.059
.068
.078
.087
.105
.123
.165
.043
.052
.061
.069
.078
.095
.112
.152
.031
.035
.039
.043
.048
.054
.060
.075
.023
.027
.031
.035
.039
.045
.050
.064
.030
.036
.042
.048
.053
.065
.077
.105
.024
.025
.034
.035
.044
.054
.064
.088
.141
.162
.184
.205
.226
.269
.312
.410
.124
.143
.161
.180
.199
.236
.274
.360
.010
.011
.012
.014
.015
.017
.020
.026
.005
.006
.007
.009
.010
.012
.015
.021

 

Flat Head

Machine Screw, Wood Screws, Tapping 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


Flat Head Undercut

Machine Screws, Self Tapping Screws
Nominal
Size
L A H J T M G N Phillips
Driver
Size
These
Lengths or Shorter
are
Undercut
Head Diameter Height of
Head
Width
Of
Slot
Depth of
Slot
Dimensions of Recess
Max.
Edge
Sharp
Min..
Edge
Rounded
or Flat
Diameter Depth Width
Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min.
4
6
8
10
12
1/4
5/16
3/8
3/16
3/16
1/4
5/16
3/8
7/16
1/2
9/16
0.225
0.279
0.332
0.385
0.438
0.507
0.635
0.762
0.195
0.244
0.292
0.340
0.389
0.452
0.568
0.685
0.047
0.059
0.070
0.081
0.092
0.107
0.134
0.161
0.038
0.048
0.058
0.068
0.078
0.092
0.116
0.140
0.039
0.048
0.054
0.060
0.067
0.075
0.084
0.094
0.031
0.039
0.045
0.050
0.056
0.064
0.072
0.081
0.022
0.027
0.032
0.037
0.043
0.050
0.062
0.075
0.014
0.017
0.021
0.024
0.028
0.032
0.041
0.049
0.117
0.146
0.174
0.189
0.233
0.250
0.317
0.365
0.104
0.133
0.161
0.176
0.220
0.237
0.304
0.352
0.078
0.078
0.106
0.121
0.121
0.136
0.168
0.216
0.062
0.055
0.083
0.098
0.098
0.113
0.146
0.194
0.018
0.025
0.029
0.030
0.030
0.032
0.053
0.061
1
2
2
2
3
3
4
4

 

Fillister Head

Machine Screws, SLOTTED, PHILLIPS
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.
2
3
4
5
6

8
10
12
1/4
5/16
3/8
.140
.161
.183
.205
.226
.270

.313
.357
.414
.518
.622
.124
.145
.166
.187
.208
.250

.292
.334
.389
.490
.590
.062
.070
.079
.088
.096
.113

.130
.148
.170
.211
.253
.053
.061
.069
.078
.086
.102
.118
.134
.155
.194
.233
.083
.095
.107
.120
.132
.156

.180
.205
.237
.295
.355
.066
.077
.088
.100
.111
.133

.156
.178
.207
.262
.315
.031
.035
.039
.043
.048
.054

.060
.067
.075
.084
.094
.023
.027
.031
.035
.039
.045

.050
.056
.064
.072
.081
.037
.043
.048
.054
.060
.071

.083
.094
.109
.137
.164
.025
.030
.035
.040
.045
.054

.064
.074
.087
.110
.133
.104
.112
.122
.143
.166
.182

.199
.259
.281
.322
.389
.091
.099
.109
.130
.153
.169

.186
.246
.268
.309
.376
.059
.068
.078
.067
.091
.108

.124
.141
.161
.203
.233
.017
.019
.019
.027
.028
.030

.031
.034
.036
.042
.065
1
1
1
2
2
2

2
3
3
3
4

Flat Head 100 degree

Machine Screws, SLOTTED, PHILLIPS
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 Washer Head

Machine Screws, Tapping Screws, Self Drilling Screws
SLOTTED
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


Oval Head

Machine Screws , Tapping Screws , Wood Screws* SLOTTED, PHILLIPS
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

 

Pan Head

Machine Screws, Tapping Screws , Self Drilling Screws
SLOTTED, PHILLIPS
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

 

Round Head


Machine Screws, Wood Screws* SLOTTED PHILLIPS
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
3
4
5
6
7*
8
9*
10
12
14*
1/4
5/16
3/8
1/2
.162
.187
.211
.236
.260
.285
.309
.334
.359
.408
.457
.472
.590
.708
.813
.146
.169
.193
.217
.240
.264
.287
.311
.334
.382
.429
.443
.557
.670
.766
.069
.078
.086
.095
.103
.111
.120
.128
.137
.153
.170
.175
.216
.256
.355
.059
.067
.075
.083
.091
.099
.107
.115
.123
.139
.155
.160
.198
.237
.332
.031
.035
.039
.043
.048
.048
.054
.054
.060
.067
.075
.075
.084
.094
.106
.023
.027
.031
.035
.039
.039
.045
.045
.050
.056
.064
.064
.072
.081
.091
.048
.053
.058
.063
.068
.072
.077
.082
.087
.096
.106
.109
.132
.155
.211
.037
.040
.044
.047
.051
.055
.058
.062
.065
.072
.080
.082
.099
.117
.159
.100
.109
.118
.154
.162
.170
.178
.186
.195
.249
.265
.268
--
--
--
.087
.096
.105
.141
.149
.157
.165
.173
.182
.236
.252
.255
--
--
--
.053
.062
.072
.074
.084
.092
.101
.110
.119
.125
.142
.147
--
--
--
.017
.018
.019
.027
.027
029
.030
.030
.031
.032
.034
.034
--
--
--
1
1
1
2
2
2
2
2
2-3*
3
3
3
--
--
--

 

Truss Head

Machine Screws, Tapping Screws SLOTTED, PHILLIPS
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
.053
.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
--

 

Combination Drive Pan Head

  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

 

Pan Head Torx Drive

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


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