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 5950-01-121-7882
NSN 6320-01-384-3850
NSN 6685-00-273-7017
NSN 5935-01-487-3671
NSN 5930-01-310-2627
NSN 6650-01-530-8609
NSN 5910-01-655-7712
NSN 5920-01-424-2965
NSN 5910-00-838-4861
NSN 6130-01-172-0367
NSN 5930-01-080-2872
NSN 5950-01-303-0995