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Screw Head Dimensions


Binding Head Undercut

Binding Head Undercut Machine Screws
Machine Screws
Binding Head Undercut Machine Screws
SLOTTED   SLOTTED
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

Flat Head Screws Machine Screw
Wood Screws *
Tapping Screws
Phillips 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
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

Flat Head Undercut Screws Machine Screws
Self Tapping Screws
Flat Head Undercut 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

Slotted Fillister Head Machine Screws
Machine Screws
Phillips 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

Slotted Flat Head 100 Screws Machine Screws Phillips Flat Head 100 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

Hex Washer Head Screws Machine Screws
Tapping Screws
Self Drilling Screws
Hex Head Screws
SLOTTED   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

Slotted Oval Head Screws Machine Screws
Tapping Screws
Wood Screws*
Phillips Oval Head 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

Slotted Pan Head Screws Machine Screws
Tapping Screws
Self Drilling Screws
Phillips Pan Head 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

Slotted Round Head Screws Machine Screws
Wood Screws*
Phillips Round Head 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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