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 5990-01-149-0691
NSN 6105-01-226-7600
NSN 6220-00-296-4101
NSN 5990-00-409-3594
NSN 5910-01-100-3068
NSN 5960-01-206-8809
NSN 6620-00-431-3837
NSN 6105-01-094-5268
NSN 2925-01-154-2949
NSN 6105-01-521-3937
NSN 5925-01-330-7616
NSN 5910-01-477-3514