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 5965-01-373-4716
NSN 5998-01-647-7900
NSN 5905-00-067-7364
NSN 6145-00-062-7897
NSN 6150-00-554-7591
NSN 6130-00-518-4305
NSN 6240-00-419-3196
NSN 6320-01-201-2776
NSN 5935-01-141-7694
NSN 5960-01-499-7172
NSN 6620-01-601-4314
NSN 5985-01-639-8150