39 十字槽盘头自钻自攻螺钉GB/T 15856.1—2002标准
十字槽盘头自钻自攻螺钉GB15856.1—2002标准
十字槽盘头自钻自攻螺钉的尺寸规格、质量见表4.2-94、表4.2-95。
表4.2-94 十字槽盘头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 | |
| 头部直径dk | max | 5.6 | 7 | 8 | 9.5 | 11 | 12 |
| 头部高度k | max | 2.4 | 2.6 | 3.1 | 3.7 | 4 | 4.6 |
| 钻头直径dp ≈ | 2.3 | 2.8 | 3.6 | 4.1 | 4.8 | 5.8 | |
| 十字槽号 | 1 | 2 | 2 | 2 | 3 | 3 | |
| 公称长度l | 范围 | 9.5~19 | 9.5~25 | 13~38 | 13~50 | 16~50 | 19~50 |
表4.2-95 十字槽盘头自钻自攻螺钉的质量
每1000件钢螺钉的质量（p = 7.85 g/cm3) /kg
| l | G | l | G | l | G | l | G | l | G | l | G |
| ST2.9 | ST3.5 | 规格=ST4.2 | ST4.8 | ST5.5 | ST6.3 | ||||||
| 9.5 | 0.56 | 9.5 | 0.87 | 13 | 1.57 | 13 | 2.47 | 16 | 3.72 | 19 | 5.62 |
| 13 | 0.67 | 13 | 1.04 | 16 | 1.77 | 16 | 2.7 | 19 | 4.03 | 22 | 6.1 |
| 16 | 0.76 | 16 | 1.18 | 19 | 1.97 | 19 | 2.97 | 22 | 4.38 | 25 | 6.58 |
| 19 | 0.86 | 19 | 1.31 | 22 | 2.17 | 22 | 3.23 | 25 | 4.73 | 32 | 7.7 |
| 22 | 1.45 | 25 | 2.36 | 25 | 3.5 | 32 | 5.55 | 38 | 8.66 | ||
| 25 | 1.59 | 32 | 2.82 | 32 | 4.11 | 38 | 6.26 | 45 | 9.78 | ||
| 38 | 3.21 | 38 | 4.65 | 45 | 7.08 | 50 | 10.58 | ||||
| 45 | 5.27 | 50 | 7.67 | ||||||||
| 50 | 5.71 | ||||||||||