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 5920-01-424-0745
NSN 5945-01-443-3423
NSN 6130-01-359-2701
NSN 6130-00-175-8063
NSN 6110-01-116-4251
NSN 6685-01-284-4540
NSN 5998-01-421-3179
NSN 5960-01-089-8155
NSN 5999-00-509-2589
NSN 6645-01-633-1852
NSN 5965-00-469-5009
NSN 5925-01-218-5999