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 6610-01-202-7404
NSN 5910-01-218-5413
NSN 5910-00-265-5797
NSN 5960-01-100-4454
NSN 6145-01-576-6575
NSN 6130-00-964-2928
NSN 5985-00-887-7775
NSN 5920-01-217-1637
NSN 5910-01-254-6097
NSN 5930-00-172-9197
NSN 4140-01-240-1116
NSN 5985-01-610-5176