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 4140-01-628-5495
NSN 5855-01-357-7907
NSN 5945-00-188-6541
NSN 5855-01-428-9456
NSN 5950-01-633-6540
NSN 5935-01-611-1223
NSN 6150-00-155-8511
NSN 6130-01-025-9836
NSN 5910-01-456-6605
NSN 5910-01-076-3598
NSN 5905-01-422-2597
NSN 6645-00-470-5310