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 5990-00-223-5938
NSN 6650-01-044-5431
NSN 5895-01-301-8240
NSN 4140-01-607-3198
NSN 5930-00-826-6915
NSN 6645-01-056-5291
NSN 6220-00-300-3595
NSN 6130-01-429-0063
NSN 5910-00-824-8998
NSN 5950-00-296-5505
NSN 5930-00-453-2003
NSN 6685-01-192-3051