Thread & Flare Data For Brass Line Fittings

Tube/pipe size	Refrig. SAE flare thread size	Pipe BSP (T.P.I.)	Pipe NPT (T.P.I.)
1/8"	5/16" - 24 T.P.I.	28	27
3/16"	3/8" - 24 T.P.I.	-	-
1/4"	7/16" - 20 T.P.I.	19	18
5/16"	1/2" - 20 T.P.I.	-	-
3/8"	5/8" - 18 T.P.I.	19	18
1/2"	3/4" - 16 T.P.I.	14	14
5/8"	7/8" - 14 T.P.I.	-	-
3/4"	1 1/16" - 14 T.P.I.	14	14
7/8"	1 1/4" - 12 T.P.I.	-	-
1"	1 3/8" - 12 T.P.I.	11	11 1/2