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 5910-01-041-3583
NSN 5910-00-124-5084
NSN 6130-00-581-9322
NSN 5975-01-421-3976
NSN 5915-01-464-4379
NSN 6145-01-565-1100
NSN 5998-01-532-3577
NSN 5996-01-048-5196
NSN 6620-01-365-1499
NSN 5835-01-424-0054
NSN 6620-01-303-2563
NSN 6135-00-221-4720