材质 
M3
0.5
13.7
12.7
3.6
0.1
2.3
2.1
6.01
2.125
1.875
5.5
5.32
M4
0.7
16.4
15
4.7
0.2
3
2.8
7.66
2.925
2.675
7
6.78
M5
0.8
18.9
17.3
5.7
0.2
3.9
3.7
8.79
3.65
3.35
8
7.78
M6
1
21
19
6.8
0.25
4.6
4.4
11.05
4.15
3.85
10
9.78
M8
1.25
25.7
23.2
9.2
0.4
6.2
6
14.38
5.45
5.15
13
12.73
M10
1.5
30.8
27.8
11.2
0.4
7.7
7.5
17.77
6.58
6.22
16
15.73
M12
1.75
36
32.5
13.7
0.6
9.2
9
20.03
7.68
7.32
18
17.73
M16
2
45
41
17.7
0.6
12.7
12.5
26.75
10.18
9.82
24
23.67
M20
2.5
54.5
49.5
22.4
0.8
16.2
16
33.53
12.715
12.285
30
29.67
M24
3
63.5
57.5
26.4
0.8
19.2
19
39.98
15.215
14.785
36
35.38