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 5998-00-816-9752
NSN 5920-01-218-6191
NSN 5905-01-261-5314
NSN 6240-01-023-7720
NSN 6130-01-299-3375
NSN 5999-00-644-9767
NSN 5975-01-237-9442
NSN 5990-01-595-4584
NSN 5855-01-070-8084
NSN 5855-01-277-1663
NSN 6145-01-223-6996
NSN 6620-00-104-5677