内六角圆柱头螺钉(摘自GB/T 70.1—2000)
螺纹规格d = M5、公称长度l = 20、性能等级为8.8级、表面氧化的内六角圆柱头螺钉:标记示例
螺钉 GB/T 70.1 M5×20
附表10 mm
螺纹规格d |
M3 |
M4 |
M5 |
M6 |
M8 |
M10 |
M12 |
M14 |
M16 |
M20 |
P(螺距) b dk k t s e r |
0.5 18 5.5 3 1.3 2.5 2.87 0.1 |
0.7 20 7 4 2 3 3.44 0.2 |
0.8 22 8.5 5 2.5 4 4.58 0.2 |
1 24 10 6 3 5 5.72 0.25 |
1.25 28 13 8 4 6 6.86 0.4 |
1.5 32 16 10 5 8 9.15 0.4 |
1.75 36 18 12 6 10 11.43 0.6 |
2 40 21 14 7 12 13.72 0.6 |
2 44 24 16 8 14 16 0.6 |
2.5 52 30 20 10 17 19.44 0.8 |
公称长度l |
5~30 |
6~40 |
8~50 |
10~60 |
12~80 |
16~100 |
20~120 |
25~140 |
25~160 |
30~200 |
l系列 |
2.5,3,4,5,6,8,10,12,14,16,20,25,30,35,40,45,50,55,60,65,70,80,90,100,110,120,130,140,150,160,180,200,220,240,260,280,300 |