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 7035-01-237-8653
NSN 4140-00-108-5688
NSN 5950-01-570-5389
NSN 5960-01-389-9941
NSN 6105-01-586-7211
NSN 6145-00-925-2004
NSN 6620-01-415-2307
NSN 5996-00-421-8429
NSN 6220-01-089-7185
NSN 5965-00-823-8623
NSN 6105-00-893-6470
NSN 5996-01-161-0613