GB /T 16674.2 – 2004 – Bu lông liền long đen
| Screw Thread | M8 | M10 | M10 | M12 | M12 | M14 | M16 | |
| P | Pitch | 1 | 1 | 1.25 | 1.25 | 1.5 | 1.5 | 1.5 |
| b | L≤125 | 22 | 26 | 26 | 30 | 30 | 34 | 38 |
| 125＜L≤200 | 28 | 32 | 32 | 36 | 36 | 40 | 44 | |
| dc | max | 17 | 20.8 | 20.8 | 24.7 | 24.7 | 28.6 | 32.8 |
| k | max | 8.5 | 9.7 | 9.7 | 12.1 | 12.1 | 12.9 | 15.2 |
| s | max | 10 | 13 | 13 | 15 | 15 | 18 | 21 |
| min | 9.78 | 12.73 | 12.73 | 14.73 | 14.73 | 17.73 | 20.67 | |
