NPT Pipe Thread Male to AN Male 90 Degree Blue Aluminum

How to measure pipe thread or AN fitting thread

Pipe Thread Dimensions:
1/16" NPT is 1/16" I.D. / 0.313 O.D.
1/8" NPT is 1/8" I.D. / 0.405" O.D.
1/4" NPT is 1/4" I.D. / 0.540" O.D.
3/8" NPT is 3/8" I.D. / 0.675" O.D.
1/2" NPT is 1/2" I.D. / 0.840" O.D.
3/4" NPT is 3/4" I.D. / 1.050" O.D.
1" NPT is 1" I.D. / 1.315" O.D.
1-1/4" NPT is 1-1/4" I.D. / 1.660" O.D.
1-1/2" NPT is 1-1/2" I.D. / 1.900" O.D.
2" NPT is 2" I.D. / 2.375" O.D.
AN Fitting Thread Dimensions:
AN #2 is 5/16"-24 thread
AN #3 is 3/8"-24 thread
AN #4 is 7/16"-20 thread
AN #6 is 9/16"-18 thread
AN #8 is 3/4"-16 thread
AN #10 is 7/8"-14 thread
AN #12 is 1-1/16"-12 thread
AN #16 is 1-5/16"-12 thread
AN #20 is 1-5/8"-12 thread
AN #24 is 1-7/8"-12 thread
AN #28 is 2-1/4"-12 thread
AN #32 is 2-1/2"-12 thread