标称值
直径 (mm)
1/8
3.17500
5/32
3.96875
3/16
4.76250
1/4
6.35000
5/16
7.93750
3/8
9.52500
7/16
11.11250
1/2
12.70000
9/16
14.28750
5/8
15.87500
3/4
19.05000
7/8
22.22500
1
25.40000
