Hexagon Washer Head Tapping Screws
GB /T 16824.1 - 2023 六角凸缘（华司）自攻螺钉
See all versions and complete specifications: Hexagon Washer Head Tapping Screws — Full Specification Page
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ST2.2 | 1.1 | 2.6 | 3.82 | 5.8 | 4.28 | 1.1 | 0.4 | 2.5 | 4 | 6.3 | 2.8 |
| ST2.9 | 1.3 | 3.5 | 5.32 | 7.6 | 5.96 | 1.3 | 0.6 | 3 | 5.5 | 8.3 | 3.4 |
| ST3.9 | 1.8 | 6.0 | 9.78 | 12.2 | 10.95 | 1.8 | 1 | 5.3 | 10 | 13.5 | 5.9 |
| ST4.2 | 2.1 | 7.5 | 12.73 | 16.7 | 14.26 |
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| 2.1 |
| 1.2 |
| 6.4 |
| 13 |
| 18 |
| 7 |
| (ST3.5) | 1.6 | 4.3 | 7.78 | 9.8 | 8.71 | 1.6 | 0.9 | 3.8 | 8 | 10.5 | 4.3 |
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