42 六角法兰面自钻自攻螺钉GB/T 15856.4—2002标准
六角法兰面自钻自攻螺钉GB15856.4—2002标准
六角法兰面自钻自攻螺钉的尺寸规格、质量见表4.2-100、表4.2-101。
表4.2-100 六角法兰面自钻自攻螺钉的尺寸规格(mm)
| 螺纹规格 | ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | |
| 法兰厚度C | min | 0.4 | 0.6 | 0.8 | 0.9 | 1 | 1 |
| 法兰直径dc | max | 6.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 |
| 头部高度k | max | 2.8 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| 对边宽度s | 公称 | 4 | 5.5 | 7 | 8 | 8 | 10 |
| 钻头直径 dp ≈ | 2.3 | 2.8 | 3.6 | 4.1 | 4.8 | 5.8 | |
| 公称长度l | 范围 | 9.5-19 | 9.5-25 | 13-38 | 13-50 | 16-50 | 19-50 |
表4.2-101 六角法兰面自钻自攻螺钉的质量
每1000件钢制品的质量（p = 7.85 g/cm3) /kg
| l | G | l | G | l | G | l | G | l | G | l | G |
| ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | ||||||
| 9.5 | 0.43 | 9.5 | 0.81 | 13 | 2.74 | 13 | 3.7 | 16 | 5.02 | 19 | 8.66 |
| 13 | 0.54 | 13 | 0.97 | 16 | 2.94 | 16 | 3.93 | 19 | 5.37 | 22 | 9.14 |
| 16 | 0.63 | 16 | 1.65 | 19 | 3.14 | 19 | 4.2 | 22 | 5.72 | 25 | 9.62 |
| 19 | 0.72 | 19 | 1.79 | 22 | 3.34 | 22 | 4.46 | 25 | 6.07 | 32 | 10.74 |
| 22 | 1.93 | 25 | 3.53 | 25 | 4.73 | 32 | 6.89 | 38 | 11.7 | ||
| 25 | 2.07 | 32 | 3.99 | 32 | 5.35 | 38 | 7.6 | 45 | 12.82 | ||
| 38 | 4.39 | 38 | 5.88 | 45 | 8.42 | 50 | 13.62 | ||||
| 45 | 6.5 | 50 | 9.01 | ||||||||
| 50 | 6.95 | ||||||||||