材质 
M5
0.5|0.8
11.8
8.79
7.1
6.52
4.7
8
7.78
M6
0.75|1
14.2
11.05
9.1
8.52
5.7
10
9.78
M8
1|1.25
17.9
14.38
11.1
10.4
7.64
13
12.73
M10
1|1.25|1.5
21.8
16.64
13.5
12.8
9.64
15
14.73
M12
1|1.25|1.5|1.75
26
20.03
16.1
15.4
11.57
18
17.73
M14
1|1.5|2
29.9
23.36
18.2
16.9
13.3
21
20.67
M16
1|1.5|2
34.5
26.75
20.3
19
15.3
24
23.67
M20
1.5|2|2.5
42.8
32.95
24.8
22.7
18.7
30
29.16