材质 
M5
0.8
11.25
11.14
5.48
3.1
2.5
3.1
2.5
0.4
0.2
5.48
4.52
M6
1
13.5
12.4
6.48
3.6
3
3.6
3
0.5
0.25
6.48
5.52
M8
1.25
18
16.9
8.58
4.8
4
4.8
4
0.8
0.4
8.58
7.42
M10
1.5
22.5
21.2
10.58
5.8
5
5.8
5
0.8
0.4
10.58
9.42
M12
1.75
27
25.7
12.7
6.8
6
6.8
6
1.2
0.6
12.7
11.3
M16
2
36
34.4
16.7
8.9
8
8.9
8
1.2
0.6
16.7
15.3
M20
2.5
45
43.4
20.84
10.9
10
10.9
10
1.6
0.8
20.84
19.16
M24
3
54
52.1
24.84
13.1
12
13.1
12
1.6
0.8
24.84
23.16