Hexagon Washer Head drilling Screws with Tapping Screw Thread
GB /T 15856.5 - 2023 六角凸缘（华司）自钻自攻螺钉
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| Standard Body | Standard Number |
|---|---|
| GB | GB /T 15856.5 |
| DIN | DIN EN ISO 15480 |
| ISO | ISO 15480 |
| UNI | UNI 8117 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ST2.9 | 1.3 | 0.25 | 0.1 | 7.6 | 5.96 | 1.3 | 0.6 | 3 | 1.5 | 8.3 | 3.4 |
| ST3.5 | 1.6 | 0.3 | 0.2 | 9.8 | 8.71 | 1.6 | 0.9 | 3.8 |
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| 2.2 |
| 10.5 |
| 4.3 |
| ST4.2 | 1.8 | 0.5 | 0.25 | 12.2 | 10.95 | 1.8 | 1 | 5.3 | 3.1 | 13.5 | 5.9 |
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