45 六角凸缘自攻螺钉GB/T 16824.1—1997标准
六角凸缘自攻螺钉GB16824.1—1997标准
六角凸缘自攻螺钉的尺寸规格见表4.2-105。
表4.2-105 六角凸缘自攻螺钉的尺寸规格（mm)
| 螺纹规格 | ST2.2 | ST2.9 | ST3.5 | ST3.9 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | ST8 | |
| P | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | 2.1 | |
| a max | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | 2.1 | |
| dc | max | 4.2 | 6.3 | 8.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 | 18 |
| min | 3.8 | 5.8 | 7.6 | 7.6 | 8.1 | 9.8 | 10 | 12.2 | 16.7 | |
| c min | 0.25 | 0.4 | 0.6 | 0.6 | 0.8 | 0.9 | 1 | 1 | 1.2 | |
| S | 公称=max | 3 | 4 | 5.5 | 5.5 | 7 | 8 | 8 | 10 | 13 |
| min | 2.86 | 3.82 | 5.32 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 | 12.73 | |
| e min | 3.2 | 4.28 | 5.96 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 | 14.26 | |
| K | 公称=max | 2 | 2.8 | 3.4 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 | 7 |
| min | 1.7 | 2.5 | 3 | 3 | 3.6 | 3.8 | 4.8 | 5.3 | 6.4 | |
| K’ min | 0.9 | 1.3 | 1.5 | 1.5 | 1.8 | 2.2 | 2.7 | 3.1 | 3.3 | |
| r1 | min | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.4 |
| r2 | max | 0.15 | 0.2 | 0.25 | 0.25 | 0.3 | 0.3 | 0.4 | 0.5 | 0.6 |
| y参考 | c型 | 2 | 2.6 | 3.2 | 3.5 | 3.7 | 4.3 | 5 | 6 | 7.5 |
| F型 | 1.6 | 2.1 | 2.5 | 2.7 | 2.8 | 3.2 | 3.6 | 3.6 | 4.2 | |
| l① 商品规格范围 | 4.5~19 | 6.5〜19 | 6.5〜22 | 9.5-25 | 9.5〜25 | 9.5~32 | 13〜38 | 13 ~50 | 16 ~50 | |
①公称长度系列为4.5、6.5、9.5、13-25(3进级）、32、38、45、50 mm。