材质 
M16
2
18.83
30
10.75
9.25
10.9
1.2
10.9
11.3
11
12.8
M20
2.5
24.4
37
13.9
12.1
13.6
1.2
13.6
14.1
13.8
16.1
M22
2.5
26.4
41
14.9
13.1
15.1
1.2
15.1
15.6
15.3
17.8
M24
3
28.4
44
15.9
14.1
16.4
1.6
16.4
16.9
16.6
19.3
M27
3
32.84
50
17.9
16.1
18.6
2
18.6
19.3
18.7
21.9
M30
3.5
35.84
55
20.05
17.95
20.6
2
20.6
21.4
20.8
24.4