PETROCHEMICAL
Plating & Coatings
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SOCKET HEAD CAPSCREWS (IMPERIAL)
ASME B18.3 (1960 SERIES)
| DIA | 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 | 0.007 | 1.000 |
| 5/16 | 0.457 - 0.469 | 0.306 - 0.312 | 1/4 (0.250) | 0.151 | 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 |
DIA
Dimensions in inches
Available in Grade12.9 Steel and A2 & A4 Stainless Steel
Other materials manufactured on request