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 5990-01-565-2226
NSN 5996-01-486-2045
NSN 6610-00-451-3325
NSN 6320-01-578-6006
NSN 6135-00-891-4944
NSN 5920-00-398-0766
NSN 5925-01-461-8378
NSN 5895-01-508-7777
NSN 6150-01-564-6205
NSN 6105-00-267-6954
NSN 6105-00-894-7007
NSN 5930-00-248-9157