材质 
M12
1.75
13.7
19.85
7.79
7.21
0.6
18
17.57
M14
2
15.7
22.78
9.09
8.51
0.6
21
20.16
M16
2
17.7
26.17
10.29
9.71
0.6
24
23.16
M18
2.5
20.2
29.56
11.85
11.15
0.6
27
26.16
M20
2.5
22.4
32.95
12.85
12.15
0.8
30
29.16
M22
2.5
24.4
37.29
14.35
13.65
0.8
34
33
M24
3
26.4
39.55
15.35
14.65
0.8
36
35
M27
3
30.4
45.2
17.35
16.65
1
41
40
M30
3.5
33.4
50.85
19.12
18.28
1
46
45
M33
3.5
36.4
55.37
21.42
20.58
1
50
49
M36
4
39.4
60.79
22.92
22.08
1.2
55
53.8
M39
4
42.4
66.44
25.42
24.58
1.2
60
58.8
M42
4.5
45.6
72.02
26.42
25.58
1.2
65
63.8