材质 
M6
1
3.125
2.875
14
13.73
11.05
9.29
8.71
10
9.78
M8
1.25
3.65
3.35
18
17.73
14.38
12.35
11.65
13
12.73
M10
1.5
4.15
3.85
22
21.67
17.77
15.35
14.65
16
15.73
M12
1.75
4.15
3.85
25
24.67
20.03
18.35
17.65
18
17.73
M16
2
5.15
4.85
31
30.61
26.75
24.42
23.58
24
23.67
M20
2.5
6.15
5.85
37
36.61
33.53
30.42
29.58
30
29.67
M24
3
6.15
5.85
45
44.61
39.98
36.5
35.5
36
35.38
M27
3
7.18
6.82
50
49.61
45.63
40.5
39.5
41
40.38
M30
3.5
8.18
7.82
58
57.54
51.28
45.5
44.5
46
45.38
M36
4
10.18
9.82
68
67.54
61.31
54.6
53.4
55
54.26
M42
4.5
12.215
11.785
80
79.54
72.61
63.6
62.4
65
64.26
M48
5
14.215
13.785
92
91.46
83.91
72.6
71.4
75
74.26