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 5935-00-170-6519
NSN 5945-00-363-9481
NSN 5950-01-496-0553
NSN 5990-00-070-9608
NSN 5905-00-192-5863
NSN 6110-00-887-1923
NSN 6320-00-468-8421
NSN 5999-01-013-9236
NSN 5965-01-198-3256
NSN 4140-00-910-3425
NSN 5910-00-173-0356
NSN 6610-01-211-4210