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 5990-00-428-1895
NSN 5990-00-866-1225
NSN 6145-01-242-9211
NSN 6220-01-464-6707
NSN 5998-01-403-2586
NSN 6240-00-161-8099
NSN 5985-01-224-9016
NSN 5935-00-489-1997
NSN 5999-01-174-2256
NSN 2925-01-453-1606
NSN 6645-01-649-5069
NSN 5999-01-413-3449