材质 
M8
1.25
2.88
3.12
10
9.42
5.5
5.32
10.78
11.22
0.4
8
7.78
2
2.25
10
9.42
M10
1.5
2.88
3.12
13
12.3
7
6.78
12.78
13.22
0.4
10
9.78
2.5
2.75
13
12.3
M12
1.75
3.85
4.15
17
16.3
8.5
8.28
15.78
16.22
0.6
13
12.73
3
3.25
17
16.3
M16
2
3.85
4.15
21
20.16
12
11.73
19.74
20.26
0.6
16
15.73
4
4.3
21
20.16
M20
2.5
4.85
5.15
27
26.16
15
14.73
24.74
25.26
0.8
21
20.67
5
5.3
27
26.16
M24
3
5.85
6.15
32
31
18
17.73
27.74
28.26
0.8
24
23.67
6
6.3
32
31