22 内六角花形半沉头螺钉GB/T 2674—2004标准
内六角花形半沉头螺钉GB2674—2004标准
内六角花形半沉头螺钉的尺寸规格、质量见表4.2-51、表4.2-52。
表4.2-51 内六角花形半沉头螺钉的尺寸规格(mm)
螺纹规格 d(6g) | M2 | M2.5 | M3 | (M3.5) | M4 | M5 | M6 | M8 | M10 | ||
a max | 0.8 | 0.9 | 1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 3 | ||
b min | 25 | 25 | 25 | 38 | 38 | 38 | 38 | 38 | 38 | ||
dk | 理论 max | 4.4 | 5.5 | 6.3 | 8.2 | 9.4 | 10.4 | 12.6 | 17.3 | 20 | |
实际 | 公称=max | 3.8 | 4.7 | 5.5 | 7.3 | 8.4 | 9.3 | 11.3 | 15.8 | 18.3 | |
min | 3.5 | 4.4 | 5.2 | 6.94 | 8.04 | 8.94 | 10.87 | 15.37 | 17.78 | ||
k 公称=max | 1.2 | 1.5 | 1.65 | 2.35 | 2.7 | 2.7 | 3.3 | 4.65 | 5 | ||
rf ≈ | 4 | 5 | 6 | 8.5 | 9.5 | 9.5 | 12 | 16.5 | 19.5 | ||
内六角花形 | 槽号No | 6 | 8 | 10 | 15 | 20 | 25 | 30 | 45 | 50 | |
A参考 | 1.75 | 2.4 | 2.8 | 3.35 | 3.95 | 4.5 | 5.6 | 7.95 | 8.95 | ||
t | max | 0.77 | 1.04 | 1.15 | 1.53 | 1.8 | 2.03 | 2.42 | 3.31 | 3.81 | |
min | 0.63 | 0.91 | 0.88 | 1.27 | 1.42 | 1.65 | 2.02 | 2.92 | 3.42 | ||
l①商品规格范围 | 3〜20 | 3〜25 | 4〜30 | 3〜35 | 5〜40 | 6〜45 | 8〜60 | 10〜60 | 12〜60 |
注:尽可能不采用括号内的规格。
①公称长度系列为:3、4、5、6-16(2进级)、20-60(5进级)。
表4.2-52 内六角花形半沉头螺钉的质量
每1000件钢螺钉的质量(p=7.85g/cm³)/kg
l | G | l | G | l | G | l | G | l | G | l | G | l | G | l | G | l | G |
M2 | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | M10 | |||||||||
3 | 0.119 | 3 | 0.212 | 4 | 0.351 | 5 | 0.669 | 5 | 0.99 | 6 | 1.49 | 8 | 2.79 | 10 | 6.89 | 12 | 11.4 |
4 | 0.138 | 4 | 0.242 | 5 | 0.395 | 6 | 0.729 | 6 | 1.07 | 8 | 1.73 | 10 | 3.14 | 12 | 7.53 | 14 | 12.5 |
5 | 0.156 | 5 | 0.272 | 6 | 0.439 | 8 | 0.849 | 8 | 1.23 | 10 | 1.97 | 12 | 3.49 | 14 | 8.17 | 16 | 13.5 |
6 | 0.175 | 6 | 0.302 | 8 | 0.527 | 10 | 0.969 | 10 | 1.39 | 12 | 2.21 | 14 | 3.84 | 16 | 8.81 | 20 | 15.5 |
8 | 0.212 | 8 | 0.362 | 10 | 0.615 | 12 | 1.09 | 12 | 1.54 | 14 | 2.45 | 16 | 4.19 | 20 | 10.1 | 25 | 18 |
10 | 0.249 | 10 | 0.422 | 12 | 0.703 | 14 | 1.21 | 14 | 1.7 | 16 | 2.69 | 20 | 4.89 | 25 | 11.7 | 30 | 20.6 |
12 | 0.287 | 12 | 0.482 | 14 | 0.791 | 16 | 1.33 | 16 | 1.85 | 20 | 3.17 | 25 | 5.77 | 30 | 13.3 | 35 | 23.1 |
14 | 0.325 | 14 | 0.543 | 16 | 0.879 | 20 | 1.57 | 20 | 2.17 | 25 | 3.77 | 30 | 6.64 | 35 | 14.9 | 40 | 25.6 |
16 | 0.362 | 16 | 0.603 | 20 | 1.06 | 25 | 1.87 | 25 | 2.56 | 30 | 4.37 | 35 | 7.52 | 40 | 16.5 | 45 | 28.1 |
20 | 0.436 | 20 | 0.723 | 25 | 1.28 | 30 | 2.17 | 30 | 2.95 | 35 | 4.97 | 40 | 8.39 | 45 | 18.1 | 50 | 30.7 |
25 | 0.874 | 30 | 1.5 | 35 | 2.47 | 35 | 3.34 | 40 | 5.57 | 45 | 9.27 | 50 | 19.7 | 55 | 33.2 | ||
40 | 3.73 | 45 | 6.16 | 50 | 10.1 | 55 | 21.3 | 60 | 35.7 | ||||||||
50 | 6.76 | 55 | 11 | 60 | 22.9 | ||||||||||||
60 | 11.9 |