材质 
M5
0.8
5.023
5.015
5
4.88
2.3
2.5
1.5
1.3
2.5
4
2.06
2.02
0.7
0.3
M6
1
6.023
6.015
6
5.88
2.9
3.1
1.8
1.6
3.2
5
2.58
2.52
0.7
0.3
M8
1
8.028
8.019
8
7.85
3.5
4
2
1.8
4
6
3.1
3.02
1
0.6
M10
1.25
10.028
10.019
10
9.85
4.6
5
2.3
2.1
5
7
4.12
4.03
1
0.6