Socket head cap screws to ISO 4762 / DIN 912 are the standard machine-building fastener: cylindrical head of diameter 1.5 d, hexagon socket, thread length 2d + 6 mm on longer screws. Property class 12.9 (black, oiled) is the default for machine tools and jigs, 8.8 and 10.9 where the joint is designed for lower preload or where zinc plating is required, stainless A2-70 and A4-70 for food, water and marine equipment. Head and socket dimensions are identical between ISO 4762 and DIN 912; only the older DIN sizes M10 and M12 differ marginally in head height tolerance. The finder groups the catalogue by thread diameter and length with one column per material.
Counterbore the head to DIN 974-1 (series 1 for socket heads, e.g. Ø 11 mm × 6.5 mm deep for M6). Use hexagon keys to ISO 2936 of the correct across-flats (5 mm for M6, 6 mm for M8, 8 mm for M10, 10 mm for M12); worn keys round the socket. Stainless socket screws gall easily — apply an anti-seize compound and tighten to the reduced torque values for A2/A4.
Coverage: 5,369 catalogue rows with a readable rating, of 9,674 in these categories. Each cell lists up to 2 part numbers per column; click a part number for the product page and a quotation.
| Thread × length | Steel 8.8 | Steel 10.9 | Steel 12.9 | Stainless A2 | Stainless A4 | Other |
|---|---|---|---|---|---|---|
| M1.6 × 3 | — | — | 476212016003 | 4762A201600370FTKNURL | 4762A4016003 4762A401600370 | — |
| M1.6 × 4 | — | — | 476212016004 | 4762A2016004 4762A201600470 | 4762A401600470 | — |
| M1.6 × 5 | — | — | 476212016005 476212016005KNURL | 4762A201600570 | 4762A401600570 4762A401600570W | — |
| M1.6 × 6 | — | — | 476212016006 | 4762A201600670 4762A201600670KNURL | 4762A401600670 4762A401600670W | 4762T016006 |
| M1.6 × 8 | — | — | 476212016008 | 4762A201600870 4762A201600870KNURL | 4762A401600870 4762A401600870W | — |
| M1.6 × 10 | — | — | 476212016010 | 4762A2016010 4762A201601070 | 4762A401601070 | — |
| M1.6 × 12 | — | — | — | 4762A201601270 | 4762A401601270 | — |
| M1.6 × 14 | — | — | — | 4762A201601470 | — | — |
| M1.6 × 16 | 47628016016 | — | — | 4762A2016016 4762A201601670 | 4762A401601670 | — |
| M1.6 × 18 | — | — | — | 4762A2016018 | — | — |
| M1.6 × 20 | — | — | — | 4762A201602070 | 4762A401602070 | — |
Part numbers and designations are those of the original manufacturers and are given for identification. cBallast is an independent supplier; confirm ratings against the nameplate of the installed equipment before ordering. Table generated from the cBallast catalogue on 2026-09-29.