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 5990-01-147-5225
NSN 6150-00-159-0813
NSN 6610-00-281-9516
NSN 5975-00-587-4871
NSN 5999-01-396-1892
NSN 4140-01-408-7760
NSN 5990-00-784-6067
NSN 6135-01-116-3385
NSN 5935-00-660-9703
NSN 6650-01-367-7593
NSN 6110-01-425-1449
NSN 6110-01-335-6815