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 5945-00-269-5375
NSN 5975-01-215-1205
NSN 5935-01-098-7859
NSN 5998-01-442-5829
NSN 5910-01-443-3016
NSN 6220-01-654-0007
NSN 6645-01-143-0137
NSN 6105-00-557-8962
NSN 5905-01-544-3941
NSN 6610-00-100-1195
NSN 5998-01-660-3710
NSN 6130-01-425-2678