材质 
M3
0.5
5.5
5.34
2.2
1.8
0.3
6.3
3
M4
0.7
7
6.8
3
2.6
0.3
8.1
4
M5
0.8
8
7.8
3.74
3.26
0.3
9.2
5
M6
1
10
9.8
4.24
3.76
0.4
11.5
6
M8
1.25
14
13.76
5.74
5.26
0.4
16.2
8
M10
1.5
17
16.76
7.29
6.71
0.4
19.6
10
M12
1.75
19
18.72
8.29
7.71
0.6
21.9
12
M14
2
22
21.72
9.29
8.71
0.6
25.4
14
M16
2
24
23.72
10.29
9.71
0.6
27.7
16
M18
2.5
27
26.72
12.35
11.65
1
31.2
18
M20
2.5
30
29.72
13.35
12.65
1
34.6
20
M22
2.5
32
31.66
14.35
13.65
1
36.9
22
M24
3
36
35.66
15.35
14.65
1
41.6
24
M27
3
41
40.66
17.35
16.65
1
47.3
27
M30
3.5
46
45.66
19.42
18.58
1
53.1
30
M36
4
55
54.6
23.42
22.58
1.5
63.5
36
M42
4.5
65
64.6
26.42
25.58
1.5
75
42
M48
5
75
74.6
30.42
29.58
1.5
86.5
48