Thread Cutting Screws

 

Flat Head Thread Cutting Screws Flat Head
Machine Screws
Wood Screws *
Tapping Screws
Flat Head Thread Cutting Screws
SLOTTED PHILLIPS

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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

 

 

Floorboard Thread Cutting Screws Flat Head Torx® Drive
(Floorboard)
® Torx is a registered trademark of Camcar division of Textron Inds.
Floorboard Thread Cutting Screws

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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

 

Flat Head 100º
Machine Screws
SLOTTED PHILLIPS
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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
Hex Washer Head Thread Cutting Screws Machine Screws
Tapping Screws
Self Drilling Screws
Hex Head Thread Cutting Screws
SLOTTED SLOTTED
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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 Thread Cutting Screws Oval Head
Machine Screws
Tapping Screws
Wood Screws*
Oval Head Thread Cutting Screws
SLOTTED PHILLIPS
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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 Thread Cutting Screws Pan Head
Machine Screws
Tapping Screws
Self Drilling Screws
Pan Head Thread Cutting Screws
SLOTTED PHILLIPS
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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 Tapping 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

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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

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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

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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

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

 

Wood Screws Click here toRequest a quote.

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