Fitting Thread Size

1/2
1/2 in
1/2" NPS (National Pipe Straight) Male Thread
1/2-14
1/2-20
1/4
1/4 in
1/4"-28
1/4-18
1/4-19
1/8
1/8 in
1/8"-27
1/8-27
1/8-28
3/4"-16
3/4-16
3/8
3/8 in
3/8-18
3/8-24
5/8"-18
5/8-18
7/16"-20
7/16-20
M22
M5
M6
M8