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 6610-00-065-8117
NSN 5960-00-883-0971
NSN 6685-00-961-1990
NSN 6645-01-500-0827
NSN 5950-01-295-0061
NSN 6620-01-329-3563
NSN 6240-00-489-8531
NSN 5930-00-597-5064
NSN 6130-01-252-8823
NSN 2925-01-411-4666
NSN 6320-01-605-7059
NSN 5998-00-927-3494