材质 
M6
1
10
16
6.095
6.02
5
M8
1.25
14
20
8.115
8.025
7
M10
1.5
18
25
10.115
10.025
9
M12
1.75
22
30
14.142
14.032
11
M16
2
25
40
17.23
17.05
13
M20
2.5
30
50
22.275
22.065
16
M24
3
38
60
27.275
27.065
22