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Alma Bolt Company & Prime Fasteners 1-800-526-2200

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Socket Set Screws

 

These headless, fully-threaded hex drive screws are made of heat treated alloy steel. Available in coarse and fine thread. Stocked in diameters from #0/80 to 1 1/2" and lengths up to 5". Also available with brass or nylon tips. Point styles include cup, cone, flat, oval, knurled, dog and half-dog. Technical data on most are shown below.

Group codes represented: SSS, SSSBT, SSSCP, SSSDP, SSSFP, SSSHD, SSSKP, SSSNT, SSSOP
Part# examples: 100U300SSS, 75S62SSS (and similar for all the other group codes listed.)


Nominal Size
Shortest Nominal Length To Which Column T Applies
J
Tightening Torque (Inch-Lbs.)
Cup & Flat Point
Cone & Oval Point
Half Dog Point
Hex Key Size
4
0.19
0.19
0.19
0.05
5
5
0.19
0.19
0.19
1/16
9.5
6
0.19
0.25
0.19
1/16
9.5
8
0.19
0.25
0.25
5/64
19.4
10
0.19
0.25
0.25
3/32
33.5
1/4
0.25
0.31
0.31
1/8
77.9
5/16
0.31
0.44
0.38
5/32
156
3/8
0.38
0.44
0.44
3/16
273
7/16
0.44
0.63
0.50
7/32
428
1/2
0.5
0.63
0.63
1/4
615
5/8
0.63
0.88
0.88
5/16
1315
3/4
0.75
1.00
1.00
5/8
2150
7/8
0.88
1.00
1.00
1/2
5130
1
1
1.25
1.25
9/16
Nominal Size
J
T
C
R
Y
P
Q
Hexagon Socket Size
Key Engage-ment
Cup & Flat Point Diameter
Oval Point Radius
Cone Pt. Ang. 90º + or - 2º for these lengths and over; 118º + or - 2 for shorter lengths
Half Dog Point
Diameter
Length
Nom
Min
Max
Min
Basic
Max
Min
Max
Min
4
0.050
0.070
0.061
0.051
0.084
0.190
0.075
0.070
0.030
0.026
5
0.0625
0.080
0.067
0.057
0.094
0.190
0.083
0.078
0.033
0.027
6
0.0625
0.080
0.074
0.064
0.104
0.190
0.092
0.087
0.038
0.032
8
0.0781
0.090
0.087
0.076
0.123
0.250
0.109
0.103
0.043
0.037
10
0.0938
0.10
0.102
0.088
0.142
0.250
0.127
0.120
0.049
0.041
1/4
0.125
0.125
0.132
0.118
0.188
0.310
0.156
0.149
0.067
0.059
5/16
0.1562
0.156
0.172
0.156
0.234
0.380
0.203
0.195
0.082
0.074
3/8
0.1875
0.188
0.212
0.194
0.281
0.440
0.250
0.241
0.099
0.089
7/16
0.2188
0.219
0.252
0.232
0.328
0.500
0.297
0.287
0.114
0.104
1/2
0.250
0.250
0.291
0.270
0.375
0.570
0.344
0.334
0.130
0.120
5/8
0.3125
0.312
0.371
0.347
0.469
0.750
0.469
0.456
0.164
0.148
3/4
0.375
0.375
0.450
0.425
0.562
0.880
0.562
0.549
0.196
0.180
7/8
0.500
0.500
0.530
0.502
0.656
1.000
0.656
0.642
0.227
0.211
1
0.5625
0.562
0.609
0.579
0.750
1.130
0.750
0.734
0.260
0.240
Tolerance on Length
Nominal Screw Length
Up to 0.63 in., Incl.
Over 0.63 to 2.00 in., Incl.
Over 2.00 to 3.00 in., Incl.
+ or - 0.01
+ or - 0.02
+ or - 0.03
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