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 6110-01-308-4492
NSN 5930-01-354-4095
NSN 6685-00-775-4320
NSN 6145-01-269-5340
NSN 5835-01-469-6009
NSN 5915-01-168-6570
NSN 6110-01-610-3039
NSN 5965-01-351-6977
NSN 5975-01-286-4085
NSN 5950-00-597-3661
NSN 6610-01-361-8965
NSN 5935-01-360-6240