| 螺纹直径d/mm | 性 能 等 级 | ||||||||||
| CU1 | CU2 | CU3 | CU4 | CU5 | AL1 | AL2 | AL3 | AL4 | AL5 | AL6 | |
| 最小破坏扭力矩/N·m | |||||||||||
| 1.6 | 0.06 | 0.10 | 0.10 | 0.11 | 0.14 | 0.06 | 0.07 | 0.08 | 0.1 | 0.11 | 0.12 |
| 2 | 0.12 | 0.21 | 0.21 | 0.23 | 0.28 | 0.13 | 0.15 | 0.16 | 0.2 | 0.22 | 0.25 |
| 2.5 | 0.24 | 0.45 | 0.45 | 0.5 | 0.6 | 0.27 | 0.3 | 0.3 | 0.43 | 0.47 | 0.5 |
| 3 | 0.4 | 0.8 | 0.8 | 0.9 | 1.1 | 0.5 | 0.6 | 0.6 | 0.8 | 0.8 | 0.9 |
| 3.5 | 0.7 | 1.3 | 1.3 | 1.4 | 1.7 | 0.8 | 0.9 | 0.9 | 1.2 | 1.3 | 1.5 |
| 4 | 1 | 1.9 | 1.9 | 2 | 2.5 | 1.1 | 1.3 | 1.4 | 1.8 | 1.9 | 2.2 |
| 5 | 2.1 | 3.8 | 3.8 | 4.1 | 5.1 | 2.4 | 2.7 | 2.8 | 3.7 | 4 | 4.5 |