PETROCHEMICAL
SOCKET CAPSCREWS
Socket Capscrews are available off the shelf in the materials listed below. These are available in Imperial and Metric threads and can be coated or plated to suit customer requirements as requested. Other grades of material are manufactured to order. For a full list of materials available please see our materials section.
| GRADE | MATERIAL DESCRIPTION |
|---|---|
| A193 B7 | Chromium-Molybdenum, Alloy Steel, AISI 4140 |
| A320 L7 | Chromium-Molybdenum, Alloy Steel, AISI 4140, Low Temperature Service |
DIMENSIONS
ASME B18.3 (1960 SERIES)
| DIAMETER | A | B | B° nom | M (MIN) | R° min | S (MIN) |
|---|---|---|---|---|---|---|
| 1/4 | 0.365 - 0.375 | 0.244 - 0.250 | 3/16 (0.188) | 0.120 | — | 1.000 |
| 5/16 | 0.457 - 0.469 | 0.306 - 0.312 | 1/4 (0.250) | 1.151 | 0.009 | 1.120 |
| 3/8 | 0.550 - 0.562 | 0.368 - 0.375 | 5/16 (0.312) | 0.182 | 0.012 | 1.250 |
| 7/16 | 0.642 - 0.656 | 0.430 - 0.438 | 3/8 (0.375) | 0.213 | 0.014 | 1.380 |
| 1/2 | 0.735 - 0.750 | 0.492 - 0.500 | 3/8 (0.375) | 0.245 | 0.016 | 1.500 |
| 9/16 | 0.827 - 0.843 | 0.554 - 0.562 | 7/16 (0.438) | 0.276 | 0.021 | 1.630 |
| 5/8 | 0.921 - 0.938 | 0.616 - 0.625 | 1/2 (0.500) | 0.307 | 0.021 | 1.750 |
| 3/4 | 1.107 - 1.125 | 0.740 - 0.750 | 5/8 (0.625) | 0.370 | 0.025 | 2.000 |
| 7/8 | 1.293 - 1.312 | 0.864 - 0.875 | 3/4 (0.750) | 0.432 | 0.031 | 2.250 |
| 1 | 1.479 - 1.500 | 0.988 - 1.000 | 3/4 (0.750) | 0.495 | 0.034 | 2.500 |
| 1-1/8 | 1.665 - 1.688 | 1.111 - 1.125 | 7/8 (0.875) | 0.557 | 0.039 | 2.810 |
| 1-1/4 | 1.852 - 1.875 | 1.236 - 1.250 | 7/8 (0.875) | 0.620 | 0.044 | 3.120 |
| 1-3/8 | 2.038 - 2.062 | 1.360 - 1.375 | 1 (1.000) | 0.682 | 0.048 | 3.440 |
| 1-1/2 | 2.224 - 2.250 | 1.485 - 1.500 | 1 (1.000) | 0.745 | 0.052 | 3.750 |
PLATE & BOLT DATA
1/4
A0.365 - 0.375
B0.244 - 0.250
B° NOM3/16 (0.188)
M (MIN)0.120
R° MIN—
S (MIN)1.000
5/16
A0.457 - 0.469
B0.306 - 0.312
B° NOM1/4 (0.250)
M (MIN)1.151
R° MIN0.009
S (MIN)1.120
3/8
A0.550 - 0.562
B0.368 - 0.375
B° NOM5/16 (0.312)
M (MIN)0.182
R° MIN0.012
S (MIN)1.250
7/16
A0.642 - 0.656
B0.430 - 0.438
B° NOM3/8 (0.375)
M (MIN)0.213
R° MIN0.014
S (MIN)1.380
1/2
A0.735 - 0.750
B0.492 - 0.500
B° NOM3/8 (0.375)
M (MIN)0.245
R° MIN0.016
S (MIN)1.500
9/16
A0.827 - 0.843
B0.554 - 0.562
B° NOM7/16 (0.438)
M (MIN)0.276
R° MIN0.021
S (MIN)1.630
5/8
A0.921 - 0.938
B0.616 - 0.625
B° NOM1/2 (0.500)
M (MIN)0.307
R° MIN0.021
S (MIN)1.750
3/4
A1.107 - 1.125
B0.740 - 0.750
B° NOM5/8 (0.625)
M (MIN)0.370
R° MIN0.025
S (MIN)2.000
7/8
A1.293 - 1.312
B0.864 - 0.875
B° NOM3/4 (0.750)
M (MIN)0.432
R° MIN0.031
S (MIN)2.250
1
A1.479 - 1.500
B0.988 - 1.000
B° NOM3/4 (0.750)
M (MIN)0.495
R° MIN0.034
S (MIN)2.500
1-1/8
A1.665 - 1.688
B1.111 - 1.125
B° NOM7/8 (0.875)
M (MIN)0.557
R° MIN0.039
S (MIN)2.810
1-1/4
A1.852 - 1.875
B1.236 - 1.250
B° NOM7/8 (0.875)
M (MIN)0.620
R° MIN0.044
S (MIN)3.120
1-3/8
A2.038 - 2.062
B1.360 - 1.375
B° NOM1 (1.000)
M (MIN)0.682
R° MIN0.048
S (MIN)3.440
1-1/2
A2.224 - 2.250
B1.485 - 1.500
B° NOM1 (1.000)
M (MIN)0.745
R° MIN0.052
S (MIN)3.750
Dimensions in accordance with ASME B18.3 1960 Series