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 6110-01-365-4649
NSN 5925-01-411-9736
NSN 5935-01-026-5983
NSN 6645-00-958-5299
NSN 4140-00-062-1335
NSN 5965-01-514-5692
NSN 6620-01-161-3704
NSN 5998-00-039-5092
NSN 6135-01-026-9960
NSN 5855-00-327-2112
NSN 5915-01-214-0747
NSN 6220-01-102-6629