1/4
20
1
0.5
5/16
18
1.25
0.625
3/8
16
1.5
0.75
1/2
13
2
1
5/8
11
2.313
1.25
3/4
10
2.75
1.5
7/8
9
3.5
1.75
1
8
3.75
2