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 6240-01-536-3604
NSN 5990-00-137-9848
NSN 5905-00-236-8119
NSN 5998-00-925-9927
NSN 6620-00-538-8746
NSN 6685-00-143-4747
NSN 5925-01-508-2348
NSN 5985-00-997-8341
NSN 6620-01-246-7133
NSN 6220-01-246-2303
NSN 7035-01-322-8180
NSN 5990-01-095-8866