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 6130-01-512-9572
NSN 5985-00-083-6081
NSN 5996-00-143-4783
NSN 5915-00-468-0086
NSN 6135-01-457-2855
NSN 5925-01-617-6681
NSN 5925-01-521-3915
NSN 4140-00-819-5917
NSN 6685-01-292-6643
NSN 6110-01-232-0584
NSN 5945-01-409-2718
NSN 6220-01-326-5432