- 中山螺丝
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DIN 557 
*All measurements in millimeters (mm)*
| d | d1 | s | e | m |
| M5 | 6.7 | 8 | 11.3 | 4 |
| M6 | 8.7 | 10 | 14.1 | 5 |
| M8 | 11.5 | 13 | 18.4 | 6.5 |
| M10 | 14.5 | 16 | 22.6 | 8 |
| M12 | 16.5 | 18 | 25.4 | 10 |
| M16 | 22 | 24 | 33.9 | 13 |
All information is strictly informative