1/4
20|28|32
0.25
0.2408
1
5/16
18|24|32
0.3125
0.3026
1.125
3/8
16|24|32
0.375
0.3643
1.25
7/16
14|20|28
0.4375
0.4258
1.375
1/2
13|20|28
0.5
0.4876
1.5
9/16
12|18|24
0.5625
0.5495
1.625
5/8
11|18|24
0.625
0.6113
1.75
3/4
10|16|20
0.75
0.7353
2
7/8
9|14|20
0.875
0.8592
2.25
1
8|12|20
1
0.983
2.5
1-1/8
7|12|18
1.125
1.1064
2.75
1-1/4
7|12|18
1.25
1.2314
3
1-3/8
6|12|18
1.375
1.3544
3.25
1-1/2
6|12|18
1.5
1.4794
3.5