材质 
M1.6
0.35
0.8
0.55
0.803
0.724
0.711
0.7
M2
0.4
1
0.75
1.003
0.902
0.889
0.8
M2.5
0.45
1.5
1.25
1.427
1.295
1.27
1.2
M3
0.5
2
1.75
1.73
1.545
1.52
1.2
M4
0.7
2.5
2.25
2.3
2.045
2.02
1.5
M5
0.8
3.5
3.2
2.87
2.56
2.52
2
M6
1
4
3.7
3.44
3.071
3.02
2
M8
1.25
5.5
5.2
4.58
4.084
4.02
3
M10
1.5
7
6.64
5.72
5.084
5.02
4
M12
1.75
8.5
8.14
6.86
6.095
6.02
4.8
M16
2
12
11.57
9.15
8.115
8.025
6.4
M20
2.5
15
14.57
11.43
10.115
10.025
8
M24
3
18
17.57
13.72
12.142
12.032
10