标称值
直径 (mm)
1/8
3.17500
5/32
3.96875
3/16
4.76250
7/32
5.55625
1/4
6.35000
9/32
7.14375
5/16
7.93750
11/32
8.73125
3/8
9.52500
13/32
10.31875
1/2
12.70000
5/8
15.87500
3/4
19.05000
7/8
22.22500
1
25.40000