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 6150-01-332-2347
NSN 6130-01-536-5844
NSN 5990-01-621-6969
NSN 6240-01-221-1378
NSN 5855-01-349-8583
NSN 5975-01-154-2804
NSN 5950-01-115-0818
NSN 5935-01-501-8443
NSN 6685-00-871-7293
NSN 5915-00-923-3824
NSN 5945-01-427-3790
NSN 5835-00-853-7785