ISO 8736 dimensions — Taper pins with internal thread, unhardened
- Edition
- 1986 edition, current
| Size | PThread pitch | aChamfer | d2Internal thread | d3Counterbore diameter | t1Internal thread length | t2Hole depth | t3End relief |
|---|---|---|---|---|---|---|---|
| min | |||||||
| 6 | 0.7 | 0.8 | M4 | 4.3 | 6 | 10 | 1 |
| 8 | 0.8 | 1 | M5 | 5.3 | 8 | 12 | 1.2 |
| 10 | 1 | 1.2 | M6 | 6.4 | 10 | 16 | 1.2 |
| 12 | 1.25 | 1.6 | M8 | 8.4 | 12 | 20 | 1.2 |
| 16 | 1.5 | 2 | M10 | 10.5 | 16 | 25 | 1.5 |
| 20 | 1.75 | 2.5 | M12 | 13 | 18 | 28 | 1.5 |
| 25 | 2 | 3 | M16 | 17 | 24 | 35 | 2 |
| 30 | 2.5 | 4 | M20 | 21 | 30 | 40 | 2 |
| 40 | 2.5 | 5 | M20 | 21 | 30 | 40 | 2.5 |
| 50 | 3 | 6.3 | M24 | 25 | 36 | 50 | 2.5 |
Dimensions from ISO 8736:1986, the current edition.