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Socket Head Cap Screws

 

Designed for high tensile strength tool and die applications, these screws are manufactured from heat treated alloy steel and meet ANSI/ASME B18.3 standards. Available in coarse and fine thread. Stocked in diameters from #0/80 to 4" and lengths up to 24".

Group codes represented: SHCS
Part# examples: 43S850SHCS, 62U600SHCS

Basic Screw Diam.
D
A
H
C
J
T
G
K
Body Diameter
Head Diameter
Head Height
Top Chamfer or Radius
Hexagon Socket Size and Width Across Flats
Key Engage ment
Wall Thick ness
Bottom Chamfer or Radius
Max
Min
Max
Min
Max
Min
Min
Nom
Max
Min
Min
Min
Max
0
0.0600
0.0568
0.0960
0.0910
0.0600
0.0570
0.0040
0.0500
0.0510
0.0500
0.0250
0.0200
0.0070
1
0.0730
0.0695
0.1180
0.1120
0.0730
0.0700
0.0050
1/16
0.0635
0.0625
0.0310
0.0250
0.0070
2
0.0860
0.0822
0.1400
0.1340
0.0860
0.0830
0.0080
5/64
0.0791
0.0781
0.0380
0.0290
0.0070
3
0.0990
0.0949
0.1610
0.1540
0.0990
0.0950
0.0080
5/64
0.0791
0.0781
0.0440
0.0340
0.0070
4
0.1120
0.1075
0.1830
0.1760
0.1120
0.1080
0.0090
3/32
0.0952
0.0937
0.0510
0.0380
0.0080
5
0.1250
0.1202
0.2050
0.1980
0.1250
0.1210
0.0120
3/32
0.0952
0.0937
0.0570
0.0430
0.0080
6
0.1380
0.1329
0.2260
0.2180
0.1380
0.1340
0.0130
7/64
0.1111
0.1094
0.0640
0.0470
0.0080
8
0.1640
0.1585
0.2700
0.2620
0.1640
0.1590
0.0140
9/64
0.1426
0.1406
0.0770
0.0560
0.0080
10
0.1900
0.1840
0.3120
0.3030
0.1900
0.1850
0.0160
5/32
0.1587
0.1562
0.0900
0.0650
0.0080
1/4
0.2500
0.2435
0.3750
0.3650
0.2500
0.2440
0.0250
3/16
0.1900
0.1875
0.1200
0.0950
0.0100
5/16
0.3125
0.3053
0.4690
0.4570
0.3120
0.3060
0.0330
1/4
0.2530
0.2500
0.1510
0.1190
0.0100
3/8
0.3750
0.3678
0.5620
0.5500
0.3750
0.3680
0.0400
5/16
0.3160
0.3125
0.1820
0.1430
0.0100
7/16
0.4375
0.4294
0.6560
0.6420
0.4380
0.4300
0.0470
3/8
0.3790
0.3750
0.2130
0.1660
0.0100
1/2
0.5000
0.4919
0.7500
0.7350
0.5000
0.4920
0.0550
3/8
0.3790
0.3750
0.2450
0.1900
0.0150
5/8
0.625
0.6163
0.9380
0.9210
0.6250
0.6160
0.0700
1/2
0.5050
0.5000
0.3070
0.2380
0.0150
3/4
0.7500
0.7406
1.1250
1.1070
0.7500
0.7400
0.0850
5/8
0.6310
0.6250
0.3700
0.2850
0.0150
7/8
0.8750
0.8647
1.3120
1.2930
0.8750
0.8640
0.1000
3/4
0.7570
0.7500
0.4320
0.3330
0.0200
1
1.0000
0.9886
1.5000
1.4790
1.0000
0.9880
0.1140
3/4
0.7570
0.7500
0.4950
0.3800
0.0200
1 1/4
1.2500
1.2336
1.8750
1.8520
1.2500
1.2360
0.1440
7/8
0.8850
0.8750
0.6200
0.4750
0.0200
1 1/2
1.5000
1.4818
2.2500
2.2240
1.5000
1.4850
0.1760
1
1.0100
1.0000
0.7450
0.5700
0.0200
Tolerance on Length
Nominal Screw Size
Nominal Screw Length
Up to 1 in., Incl.
Over 1in. to 2-21/2 inl, Incl.
Over 2-1/2 to 6 in., Incl.
Over 6 in.
0 thru 3/8, Incl.
-0.03
-0.04
-0.06
-0.12
7/16 thru 3/4, Incl.
-0.03
-0.06
-0.08
-0.12
7/8 thru 1-1/2, Incl.
-0.05
-0.1
-0.14
-0.2

Mechanical Properties of Alloy Steel Socket Cap Screws

Nominal Size Tensile Strength (lbs., min.) Yield Strength (lbs., min.) Body Section Tightening Torque (In.-lbs.)
UNRC UNRF UNRC UNRF Single Shear Strength (lbs., min.) UNRC UNRF
0 .... 320 .... 290 305 .... 2.6
1 .... 500 .... 450 450 .... 4.8
2 665 .... 600 .... 625 7.5 ....
3 875 .... 790 .... 830 11 ....
4 1090 .... 975 .... 1060 16 ....
5 1430 .... 1290 .... 1325 24 ....
6 1640 1825 1470 1645 1615 30 34
8 2520 2650 2270 2385 2280 55 58
10 3150 3600 2835 3240 3060 79 90
1/4 5725 6550 5150 5900 5295 200 230
5/16 9430 10440 8490 9395 8285 415 460
3/8 13950 15805 12555 14225 11910 740 845
7/16 19135 21365 17220 19230 16200 1190 1305
1/2 25540 28780 22990 25905 21175 1800 2065
5/8 38400 43500 34550 39150 31300 3400 3800
3/4 56750 .... 51100 .... 45050 6000 ....
7/8 78500 .... 70700 .... 61350 8250 ....
1 103000 .... 92700 .... 80100 12500 ....
1 1/4 164700 .... 148250 .... 125100 25000 ....
1 1/2 238800 .... 215950 .... 180200 43500 ....

There are many variables that can effect these torque and load amounts. It should be used as a guide only.

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