1/4
20
1
0.5
0.21875
0.406
5/16
18
1.25
0.625
0.28125
1.219
3/8
16
1.5
0.75
0.34375
0.563
1/2
13
2
1
0.4375
0.750
5/8
11
2.3125
1.25
0.53125
0.938
3/4
10
2.75
1.5
0.625
1.125
7/8
9
3.5
1.75
0.875
1.313
1
8
3.75
2
0.875
1.5