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 6220-01-320-9490
NSN 6130-00-205-1714
NSN 6620-01-196-7670
NSN 5960-00-455-9218
NSN 5905-01-434-3580
NSN 6110-01-610-2665
NSN 6620-01-653-9278
NSN 4140-01-183-4140
NSN 5855-01-041-9392
NSN 6240-01-095-8739
NSN 6135-01-447-3086
NSN 6240-00-426-1972