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 6620-00-679-5830
NSN 6220-01-071-8437
NSN 6130-00-369-6637
NSN 5975-01-362-5622
NSN 6320-01-233-5798
NSN 6320-01-466-4175
NSN 6135-00-243-8330
NSN 6685-01-114-6809
NSN 6320-00-977-3930
NSN 5998-01-108-1782
NSN 5855-01-519-2486
NSN 5960-01-605-9921