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 6620-01-406-6840
NSN 5990-00-518-0684
NSN 6110-01-090-0804
NSN 5915-00-156-7877
NSN 5960-00-987-1897
NSN 5905-01-101-6731
NSN 5990-01-485-0260
NSN 5960-01-470-1579
NSN 6135-01-176-2206
NSN 6135-00-505-0679
NSN 6110-01-355-9732
NSN 5920-01-011-9378