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 6320-01-247-0898
NSN 5985-00-695-4547
NSN 5855-01-454-0982
NSN 5905-01-364-3559
NSN 4140-01-629-7605
NSN 5905-01-467-2112
NSN 6685-01-612-7653
NSN 5925-00-333-7475
NSN 7035-00-902-8995
NSN 6130-00-135-2979
NSN 5895-01-106-3809
NSN 5895-01-609-5385