Tuesday, March28, 2017 L-36.com

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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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.