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 6110-01-371-1063
NSN 6135-01-086-0809
NSN 5985-00-253-4296
NSN 5975-01-073-3394
NSN 5920-01-285-0391
NSN 6105-01-255-8138
NSN 5999-01-508-4013
NSN 6620-00-257-2783
NSN 5835-01-550-1577
NSN 5920-01-053-9797
NSN 6105-01-334-3266
NSN 5855-01-535-6275