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 6610-01-173-6323
NSN 5999-00-495-6850
NSN 5895-01-342-1911
NSN 2925-00-888-9551
NSN 5925-01-520-8210
NSN 6240-01-495-1912
NSN 5965-00-954-3011
NSN 5996-01-201-0981
NSN 6620-01-069-8594
NSN 5925-01-168-6090
NSN 6150-00-168-8540
NSN 6620-00-062-9722