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 6105-00-351-5552
NSN 4140-01-189-7899
NSN 6110-01-328-8832
NSN 5910-01-551-8720
NSN 6620-01-106-2814
NSN 6110-01-187-4379
NSN 6240-01-406-4042
NSN 6150-01-355-4258
NSN 5915-01-269-3874
NSN 5835-01-085-5487
NSN 6145-01-298-8914
NSN 5999-00-593-5750