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 6135-01-312-1040
NSN 5835-01-126-9358
NSN 5975-01-101-1422
NSN 5835-01-512-4834
NSN 6645-01-056-5291
NSN 5999-01-453-0856
NSN 5996-00-573-1853
NSN 5990-00-054-0512
NSN 7035-01-271-1643
NSN 5895-01-240-9275
NSN 6650-01-003-9355
NSN 5835-01-502-9228