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 5925-01-538-4747
NSN 5925-01-640-9238
NSN 6220-01-324-6422
NSN 6150-01-364-8688
NSN 5999-01-496-8506
NSN 5985-01-398-3817
NSN 5915-01-171-6222
NSN 5835-01-038-9945
NSN 5996-01-118-9475
NSN 5895-01-643-2143
NSN 5960-01-307-5409
NSN 6620-01-158-7309