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 5985-01-378-8653
NSN 4140-00-751-1694
NSN 5910-01-144-5605
NSN 6240-01-047-4085
NSN 6145-01-237-7678
NSN 6685-01-084-1433
NSN 6110-01-120-5984
NSN 5910-01-463-2710
NSN 6620-00-280-2874
NSN 6240-01-104-5693
NSN 6220-01-207-5325
NSN 5920-01-153-2360