材质 
M4
0.7
7.66
9.9
9.3
2.9
2.7
2.3
7
6.78
M5
0.8
8.79
10.85
10.15
4.4
3.5
2.5
8
7.78
M6
1
11.05
12.35
11.65
4.9
4
3
10
9.78
M8
1|1.25
14.38
14.35
13.65
6.44
5.1
4.1
13
12.73
M10
1|1.25|1.5
18.9
18.5
17.7
8.04
6.3
5.3
16
15.73
M12
1.25|1.5|1.75
21.1
22.9
22.1
10.37
7.8
5.8
18
17.73
M14
1.5|2
24.49
26.8
26
12.1
8.8
6.8
21
20.67
M16
1.5|2
26.75
27.9
27.1
14.1
9.8
7.8
24
23.67
M20
1.5|2|2.5
32.95
35.5
34.5
16.9
11.8
9.8
30
29.16