Goodwill & Company

Nominal size	Thread per inch	Pitch (mm)
R 1/16	28	0.907
R 1/8	28	0.907
R 1/4	19	1.337
R3/8	19	1.337
R 1/2	14	1.814
R3/4	14	1.814
R 1	11	2.309
R 1 1/4	11	2.309
R 1 1/2	11	2.309
R 2	11	2.309
R 2 1/2	11	2.309
R 3	11	2.309
R 4	11	2.309
R 5	11	2.309
R 6	11	2.309