材质 
M2
0.4
3.8
3.62
2.6
1.733
2
1.86
0.1
1.58
1.52
1
M2.5
0.45
4.5
4.32
3.1
2.303
2.5
2.36
0.1
2.08
2.02
1.1
M3
0.5
5.5
5.32
3.6
2.873
3
2.86
0.1
2.58
2.52
1.3
M4
0.7
7
6.78
4.7
3.443
4
3.82
0.2
3.08
3.02
2
M5
0.8
8.5
8.28
5.7
4.583
5
4.82
0.2
4.095
4.02
2.5
M6
1
10
9.78
6.8
5.723
6
5.7
0.25
5.14
5.02
3
M8
1.25
13
12.73
9.2
6.863
8
7.64
0.4
6.14
6.02
4
M10
1.5
16
15.73
11.2
9.149
10
9.64
0.4
8.175
8.025
5