材质 
M6
1
15.1
13.3
6
5.35
4.4
3.6
3.48
2.7
0.5
6.3
5.84
M8
1.25
19.1
17.3
7
6.19
5.4
4.6
4.48
3.6
0.5
8.36
7.8
M10
1.5
24.3
22.16
8
7.03
6.4
5.6
5.48
4.6
0.5
10.36
9.8
M12
1.75
29.3
27.16
9
7.86
8.45
7.55
6.48
5.6
0.8
12.43
11.76
M14
2
33.6
31
10
8.70
9.45
8.55
7.9
6.55
0.8
14.43
13.76
M16
2
36.6
34
11
9.70
10.45
9.55
8.9
7.55
1
16.43
15.76
M20
2.5
45.6
43
12
10.38
12.55
11.45
10.9
9.55
1
20.52
19.72
M24
3
53.9
50.8
13
11.05
17.55
16.45
13.1
11.45
1.5
24.52
23.72