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 6645-00-467-6094
NSN 6130-00-535-0522
NSN 6320-01-162-5977
NSN 5998-01-355-4298
NSN 2925-01-356-6017
NSN 6620-00-404-0149
NSN 5998-01-303-6218
NSN 5855-01-316-3634
NSN 5910-01-526-5702
NSN 5998-01-605-1506
NSN 5935-01-235-1257
NSN 2925-01-422-1542