Sems

Pan Head Sems Pan Head
Machine Screws
Tapping Screws
Self Drilling Screws
Pan Head Sems
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

 

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
Machine Screw Sems

 

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 A-AB Sems

 

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
Sems

 

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
Type U Sems

 

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
Wood Screw Sems

 

 

Lock Washers For Sems

Nominal
Size or Basic Screw
INTERNAL TOOTH EXTERNAL TOOTH
Washer
Thickness
Washer
Outside
Diameter
Washer
Thickness
Washer
Outside
Diameter
Max Min Max Min Max Min Max Min
2 0.0860
4 0.1120
6 0.1380
8 0.1640
10 0.1900
0.016
0.019
0.021
0.023
0.025
0.010
0.015
0.017
0.018
0.020
0.185
0.268
0.288
0.338
0.383
0.175
0.258
0.278
0.327
0.327
0.016
0.020
0.020
0.023
0.024
0.010
0.012
0.014
0.018
0.018
0.180
0.230
0.285
0.320
0.381
0.170
0.220
0.270
0.305
0.365
Lock Washers for Sems
Nominal Size or Basic Screw SPLIT LOCK SQUARE CONICAL
Washer
Thickness
Washer
Outside
Diameter
Washer
Thickness
Washer
Outside
Diameter
Max Min Max Min Max Min Max Min
4 0.1120
6 0.1380
8 0.1640
10 0.1900
0.031
0.040
0.047
0.056
0.025
0.031
0.040
0.047
0.208
0.261
0.319
0.373
0.195
0.248
0.305
0.359
0.015
0.025
0.030
0.032
0.007
0.019
0.025
0.026
0.250
0.320
0.383
0.446
0.244
0.307
0.370
0.433