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 6320-01-532-7491
NSN 5915-01-145-3070
NSN 5855-01-433-2220
NSN 6650-00-959-6869
NSN 5990-01-425-2175
NSN 2925-00-063-5898
NSN 6620-01-577-6285
NSN 5999-01-478-3974
NSN 6240-00-274-4028
NSN 5975-01-257-3494
NSN 6620-00-470-3219
NSN 5975-01-029-9682