材质 
M2
0.4
2.6
4.32
1.525
1.275
0.1
4
3.82
M2.5
0.45
3.1
5.45
1.825
1.575
0.1
5
4.82
M3
0.5
3.6
6.01
2.125
1.875
0.1
5.5
5.32
M3.5
0.6
4.1
6.58
2.525
2.275
0.1
6
5.82
M4
0.7
4.7
7.66
2.925
2.675
0.2
7
6.78
M5
0.8
5.7
8.79
3.65
3.35
0.2
8
7.78
M6
1
6.8
11.05
4.15
3.85
0.25
10
9.78
M8
1.25
9.2
14.38
5.45
5.15
0.4
13
12.73
M10
1.5
11.2
17.77
6.58
6.22
0.4
16
15.73