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 6240-01-156-4692
NSN 5930-01-527-7845
NSN 6610-00-907-9801
NSN 5990-00-915-4531
NSN 5915-01-366-7774
NSN 5945-00-088-4793
NSN 5930-01-146-8950
NSN 6240-01-350-3533
NSN 2925-01-391-9247
NSN 5990-00-232-3965
NSN 5965-01-432-3946
NSN 5905-01-246-4235