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 6645-01-513-3071
NSN 6320-00-242-3300
NSN 5915-01-079-6072
NSN 5855-01-320-7640
NSN 6320-01-412-2973
NSN 2925-01-181-3972
NSN 5935-01-051-9171
NSN 6105-01-146-9604
NSN 5935-00-060-3912
NSN 5930-01-526-2616
NSN 5996-00-820-4703
NSN 6620-01-492-9508