Hexagon Socket Head with Serrated Flange Screws
DIN 251 内六角圆柱头带法兰面螺钉（防滑螺钉）
See all versions and complete specifications: Hexagon Socket Head with Serrated Flange Screws — Full Specification Page
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M3 | 0.7 | 2 | 3 | 4 | 8.8 | 6.78 | 7 | 1 | 1.2 | 3.82 | 9 |
| M4 | 1 | 3 | 5 | 6 | 12.3 | 9.7 | 10 | 1.3 | 1.5 | 5.7 | 12.6 |
| M5 | 1.5 | 5 | 8 | 10 | 19.7 | 15.7 | 16 | 2 | 2.2 | 9.7 | 20 |
| M6 | 2 | 7 | 12 | 14 | 26.7 | 20.67 |
Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.
| 21 |
| 2.2 |
| 2.8 |
| 13.57 |
| 28 |
| M8 | 2.5 | 9 | 14 | 18 | 32.4 | 26.67 | 27 | 3 | 3.6 | 17.57 | 34 |
| M10 | 2.5 | 11 | 17 | 22 | 37.4 | 32.61 | 33 | 3 | 3.6 | 21.48 | 39 |
| M12 | 3 | 13.5 | 19 | 27 | 48.4 | 39.61 | 40 | 4 | 4.6 | 26.48 | 50 |
| M14 | 3.5 | 15.5 | 22 | 30 | 54.1 | 44.61 | 45 | 4 | 4.6 | 29.48 | 56 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.