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 6130-01-152-9131
NSN 5915-01-054-9266
NSN 5930-01-246-8624
NSN 6320-01-108-5933
NSN 5930-01-215-3325
NSN 6105-00-454-6270
NSN 6685-01-124-2347
NSN 6320-01-262-8642
NSN 5990-00-980-7808
NSN 5965-00-117-4214
NSN 5975-00-889-0496
NSN 5990-00-819-9949