材质 
M2
0.4
25
2.00
1.65
1.6
1.3
3.20
3.02
2.6
0.1
3.38
M2.5
0.45
25
2.50
2.12
2.1
1.8
4.00
3.82
3.1
0.1
4.28
M3
0.5
25
3.00
2.58
2.3
2.0
5.00
4.82
3.6
0.1
5.4
M4
0.7
38
3.50
3.00
2.6
2.3
5.50
5.32
4.1
0.1
5.96
M5
0.8
38
4.00
3.43
3.0
2.6
7.00
6.78
4.7
0.2
7.59
M6
1
38
5.00
4.36
3.8
3.3
8.00
7.78
5.7
0.2
8.71
M8
1.25
38
6.00
5.21
4.7
4.1
10.00
9.78
6.8
0.3
10.95
M10
1.5
38
8.00
7.04
6.0
5.2
13.00
12.73
9.2
0.4
14.26
M12
1.75
38
10.00
8.86
7.5
6.5
16.00
15.73
11.2
0.4
17.62