ISO 7380
ISO 7380 Button Head Socket Cap Screws / Metric Button Head Hex Socket Screws;
The dimension of ISO 7380 as below:
 |
| Size | M3 | M4 | M5 | M6 | M8 | M10 | M12 |
| r1 | 3 | 4.1 | 5.2 | 5.6 | 7.5 | 10 | 11 |
| t min. | 1.04 | 1.3 | 1.56 | 2.08 | 2.6 | 3.12 | 4.16 |
| s | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 |
| k max. | 1.65 | 2.2 | 2.75 | 3.3 | 4.4 | 5.5 | 6.6 |
| d1 | 5.5 | 7.5 | 9.5 | 10.5 | 14 | 18 | 21 |
| R.S. Torque (NM) | 1.15 | 2.7 | 5.4 | 9.15 | 22 | 44 | 77 |
* All size in mm ;