3/4 in. B 1/2 in.
No other part numbers with same form, fit, and function found.
A fitting with pipe threads having a female connection inside of a male connection, used in conjunction with another fitting, to connect in the same line, two pipes of different sizes.
NSN 7035-01-487-6481
NSN 6650-00-992-4540
NSN 5935-01-301-1627
NSN 6610-01-506-0044
NSN 7035-00-205-1932
NSN 6110-00-953-1027
NSN 2925-01-604-8984
NSN 6610-01-200-4610
NSN 5930-01-446-9190
NSN 6650-01-467-8818
NSN 5975-01-068-3043
NSN 5905-00-618-0203