材质 
M5
0.8
5.7
11.8
4.48
7.3
6.5
6.25
0.2
1.45
1.7
M6
1
6.8
14.2
5.35
9.2
7.5
7.25
0.25
1.75
2
M8
1.25
9.2
17.9
7.19
10.95
10
9.75
0.4
2.65
2.9
M10
1.5
11.2
21.8
9.03
12.65
12
11.75
0.4
3.6
3.9
M12
1.75
13.7
26
10.86
16.4
14
13.75
0.6
4.1
4.4
M14
2
15.7
29.9
12.70
18.15
16
15.75
0.6
5.1
5.4
M16
2
17.7
34.5
14.70
21.85
19
18.75
0.6
5.5
5.8
M18
2.5
20.2
38.6
16.38
25.4
21.5
21.25
0.6
6
6.4
M20
2.5
22.4
42.8
18.38
28.9
24
23.75
0.8
6.5
6.9