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 5998-01-425-2185
NSN 2925-00-436-9837
NSN 5855-01-003-7102
NSN 6645-00-171-9639
NSN 6110-00-311-6664
NSN 6610-01-533-9871
NSN 6105-00-679-5129
NSN 5999-01-653-4921
NSN 5915-00-247-8770
NSN 6620-01-400-2928
NSN 4140-01-576-1989
NSN 5910-01-484-9015