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 6110-01-536-2470
NSN 5895-01-611-7647
NSN 6650-00-647-1085
NSN 5855-01-187-2293
NSN 5905-01-357-7001
NSN 6150-01-298-3802
NSN 5945-01-432-2829
NSN 4140-01-551-1125
NSN 5910-00-217-1717
NSN 5925-01-276-3749
NSN 5910-00-964-7279
NSN 7035-01-026-0117