材质 
M8
1
9.7
10.25
4.5
6.3
M10
1.25
11.87
12.65
5.7
7.8
M12
1.5
14.4
15
6.8
9.4
M14
1.5
16.52
17.7
7.8
10.9
M16
1.5
18.52
19.9
8.8
12.4
M18
2
21.07
22
10.1
14
M20
2
23.12
24.2
11.1
15.5
M22
2
25.27
26.8
12.1
17
M24
2
27.27
29.1
13.1
18.5
M27
2
30.27
32.4
14.6
20.8
M30
2
33.27
35.81
16.1
23
M33
2
36.27
39.01
17.6
25.3
M36
3
40.45
42.67
19.6
27.8
M39
3
43.45
45.75
21.1
30.1