JIC 37deg
Dash Size Inch Size Thread
2 1/8 5/16-24
3 3/16 3/8-24
4 1/4 7/16-20
5 5/16 1/2-20
6 3/8 9/16-18
8 1/2 3/4-16
10 5/8 7/8-14
12 3/4 1 1/16-12
14 7/8 1 3/16-12
16 1 1 5/16-12