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 6110-01-400-4207
NSN 5998-01-348-4154
NSN 5895-01-406-5134
NSN 6105-00-907-6071
NSN 6135-01-164-3561
NSN 5975-00-883-1321
NSN 5905-00-254-8086
NSN 6220-01-447-3657
NSN 6620-01-633-8443
NSN 5975-01-560-6928
NSN 5925-01-573-6136
NSN 5895-00-382-9294