The Gages are used for general purpose pipe fittings where pressure tight joints are not required on Threads

Range: G1/16--G6

 

Gage Code	T.P.I	Pitch	Gage Code	T.P.I	Pitch
G1/16	28	0.907	G1 1/2	11	2.309
G1/8	28	0.907	G1 3/4	11	2.309
G1/4	19	1.337	G2	11	2.309
G3/8	19	1.337	G2 1/4	11	2.309
g1/2	14	1.814	G2 1/2	11	2.309
G5/8	14	1.814	G2 3/4	11	2.309
G3/4	14	1.814	G3	11	2.309
G7/8	11	1.814	G3 1/2	11	2.309
G1	11	2.309	G4	11	2.309
G1 1/8	11	2.309	……	11	2.309
G1 1/4	11	2.309	G6	11	2.309