材质 
M12
1.75
12.85
12.74
23.91
1.2
22
21.16
7.55
8.45
M16
2
16.85
16.74
29.56
1.2
27
26.16
9.25
10.75
M20
2.5
20.84
20.71
35.03
1.5
32
31
12.1
13.9
M22
2.5
22.84
22.71
39.55
1.5
36
35
13.1
14.9
M24
3
24.84
24.71
45.2
1.5
41
40
14.1
15.9
M27
3
27.84
27.71
50.85
2
46
45
16.1
17.9
M30
3.5
30.83
30.67
55.37
2
50
49
17.95
20.05
M36
4
36.83
36.67
66.44
2
60
58.8
21.95
24.05