Bolt Size | Grade 1(8.8) | Grade 2 (10.9) | ||
Bumps | Refusals | Bumps | Refusals | |
M12 | 4 | 3 | - | - |
M16 | 4 | 3 | 4 | 3 |
M20 | 5 | 3 | 5 | 3 |
M22 | 5 | 3 | 6 | 4 |
M24 | 6 | 4 | 7 | 4 |
M27 | 6 | 4 | 7 | 4 |
M30 | 7 | 4 | 8 | 5 |
M33 | - | - | 8 | 5 |
M36 | 8 | 5 | - | - |