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 4140-00-347-6807
NSN 4140-00-407-1326
NSN 5998-01-038-3398
NSN 5985-00-803-7468
NSN 6145-00-760-8959
NSN 6685-01-182-1781
NSN 5999-01-227-0127
NSN 5835-00-113-6090
NSN 6150-01-495-1009
NSN 6650-00-170-5095
NSN 6650-01-522-0075
NSN 5835-00-198-4936