DIN 931 dimensions — Hex Head Bolt, Partially Threaded
- Edition
- 1987 edition, withdrawn, replaced by ISO 4014
- Differs
- from ISO 4014: wrench size at M10, M12, M14 and M22Full comparison →
| Size | PThread pitch | sWidth across flats | kHead height | eWidth across corners | bThread length | ||
|---|---|---|---|---|---|---|---|
| max | nom. | min | l ≤ 125 | 125 < l ≤ 200 | l > 200 | ||
| M1.6 | 0.35 | 3.2 | 1.1 | 3.41 | 9 | – | – |
| M2 | 0.4 | 4 | 1.4 | 4.32 | 10 | – | – |
| M2.5 | 0.45 | 5 | 1.7 | 5.45 | 11 | – | – |
| M3 | 0.5 | 5.5 | 2 | 6.01 | 12 | – | – |
| M3.5 | 0.6 | 6 | 2.4 | 6.58 | 13 | – | – |
| M4 | 0.7 | 7 | 2.8 | 7.66 | 14 | – | – |
| M5 | 0.8 | 8 | 3.5 | 8.79 | 16 | 22 | – |
| M6 | 1 | 10 | 4 | 11.05 | 18 | 24 | – |
| M7 | 1 | 11 | 4.8 | 12.12 | 20 | 26 | – |
| M8 | 1.25 | 13 | 5.3 | 14.38 | 22 | 28 | – |
| M10 | 1.5 | 17 | 6.4 | 18.9 | 26 | 32 | 45 |
| M12 | 1.75 | 19 | 7.5 | 21.1 | 30 | 36 | 49 |
| M14 | 2 | 22 | 8.8 | 24.49 | 34 | 40 | 53 |
| M16 | 2 | 24 | 10 | 26.75 | 38 | 44 | 57 |
| M18 | 2.5 | 27 | 11.5 | 30.14 | 42 | 48 | 61 |
| M20 | 2.5 | 30 | 12.5 | 33.53 | 46 | 52 | 65 |
| M22 | 2.5 | 32 | 14 | 35.72 | 50 | 56 | 69 |
| M24 | 3 | 36 | 15 | 39.98 | 54 | 60 | 73 |
| M27 | 3 | 41 | 17 | 45.2 | 60 | 66 | 79 |
| M30 | 3.5 | 46 | 18.7 | 50.85 | 66 | 72 | 85 |
| M33 | 3.5 | 50 | 21 | 55.37 | 72 | 78 | 91 |
| M36 | 4 | 55 | 22.5 | 60.79 | 78 | 84 | 97 |
| M39 | 4 | 60 | 25 | 66.44 | 84 | 90 | 103 |
Dimensions from DIN 931-1:1987. The standard is withdrawn; we still make parts to it.