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 5920-01-184-3195
NSN 5835-01-062-6258
NSN 4140-01-189-2589
NSN 5910-00-448-6447
NSN 5999-01-187-2335
NSN 6620-01-568-9203
NSN 5950-01-097-4718
NSN 5999-01-459-5892
NSN 6620-00-400-4237
NSN 6130-01-557-1284
NSN 5999-00-761-0259
NSN 5985-01-212-9628