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 5905-01-634-0595
NSN 5835-01-468-6170
NSN 6240-01-244-6353
NSN 5915-01-378-8220
NSN 5855-01-600-4130
NSN 6150-00-905-6070
NSN 6685-00-317-4319
NSN 4140-01-560-4983
NSN 6110-01-010-0905
NSN 5895-01-113-1991
NSN 7035-01-012-2259
NSN 5835-01-538-8080