ISO 8737 dimensions — Taper pins with external thread, unhardened
- Edition
- 1986 edition, current
| Size | PThread pitch | aChamfer | bThread section length | d2External thread | d3Thread end diameter | zThread end length | |||
|---|---|---|---|---|---|---|---|---|---|
| max | min | max | min | max | min | max | |||
| 5 | 0.8 | 2.4 | 14 | 15.6 | M5 | 3.25 | 3.5 | 1.25 | 1.5 |
| 6 | 1 | 3 | 18 | 20 | M6 | 3.7 | 4 | 1.5 | 1.75 |
| 8 | 1.25 | 4 | 22 | 24.5 | M8 | 5.2 | 5.5 | 2 | 2.25 |
| 10 | 1.5 | 4.5 | 24 | 27 | M10 | 6.6 | 7 | 2.5 | 2.75 |
| 12 | 1.75 | 5.3 | 27 | 30.5 | M12 | 8.1 | 8.5 | 3 | 3.25 |
| 16 | 2 | 6 | 35 | 39 | M16 | 11.5 | 12 | 4 | 4.3 |
| 20 | 2 | 6 | 35 | 39 | M16 | 11.5 | 12 | 4 | 4.3 |
| 25 | 2.5 | 7.5 | 40 | 45 | M20 | 14.5 | 15 | 5 | 5.3 |
| 30 | 3 | 9 | 46 | 52 | M24 | 17.5 | 18 | 6 | 6.3 |
| 40 | 3.5 | 10.5 | 58 | 65 | M30 | 22.5 | 23 | 7 | 7.5 |
| 50 | 4 | 12 | 70 | 78 | M36 | 27.5 | 28 | 9 | 9.4 |
Dimensions from ISO 8737:1986, the current edition.