Fitting Identification Charts

Male NPT Size Chart:

NPT	Threads Per Inch	AN Size
1/8	27	4
1/4	18	6
3/8	18	8
1/2	14	10
3/4	14	12
1	11-1/2	16

 

Male AN Size Chart:

AN Size	Hose Size	Thread Size
-3	3/16	3/8-24
-4	1/4	7/16-20
-6	3/8	9/16-18
-8	1/2	3/4-16
-10	5/8	7/8-14
-12	3/4	1-1/16
-16	1	1-5/16

 

AN Hex Nut Sizing Chart:

AN Size	Hex Size
-4	9/16
-6	11/16
-8	7/8
-10	1
-12	1-1/4
-16	1-12