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 6650-00-419-4863
NSN 5999-01-415-7830
NSN 5925-01-443-6246
NSN 5965-01-059-4028
NSN 5999-01-123-9685
NSN 6220-00-243-4205
NSN 5996-01-430-2440
NSN 5950-01-294-2893
NSN 5835-01-552-3153
NSN 5935-00-208-4872
NSN 6110-00-562-3363
NSN 5925-01-547-4304