材质 
M16
2
16.7
15.3
27
26.16
31.2
29.3
1
0.6
18.7
10.45
9.55
M20
2.5
20.84
19.16
32
31
36.9
35.03
1.2
0.8
23.24
13.9
12.1
M22
2.5
22.84
21.16
36
35
41.6
39.55
1.2
0.8
25.24
14.9
13.1
M24
3
24.84
23.16
41
40
47.3
45.2
1.2
0.8
27.24
15.9
14.1
M27
3
27.84
26.16
46
45
53.1
50.85
1.5
1
30.84
17.9
16.1
M30
3.5
30.84
29.16
50
49
57.7
55.37
1.5
1
33.84
20.05
17.95
M33
3.5
34
32
55
53.8
63.5
60.79
1.5
1
37
22.05
19.95