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 5996-00-778-8663
NSN 5930-01-165-1664
NSN 5935-01-119-2891
NSN 6320-01-488-5581
NSN 6130-00-659-8106
NSN 6135-00-100-8890
NSN 5990-01-309-0048
NSN 6685-01-333-5820
NSN 6150-00-451-3014
NSN 5998-00-343-0732
NSN 6135-00-411-3171
NSN 2925-01-055-9705