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 5855-01-513-9601
NSN 6685-01-634-0611
NSN 5945-01-643-5817
NSN 5950-01-158-4361
NSN 5935-01-420-6184
NSN 6220-01-173-3177
NSN 6145-00-926-8323
NSN 6110-00-445-8658
NSN 6145-01-322-9536
NSN 4140-00-056-9448
NSN 6645-01-134-2976
NSN 6620-00-248-6950