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 6220-00-448-3522
NSN 5905-01-475-7510
NSN 2925-01-577-0004
NSN 5920-01-041-8936
NSN 5975-00-226-8429
NSN 6240-01-124-5309
NSN 6610-01-548-3401
NSN 5985-01-181-2593
NSN 6320-00-004-9158
NSN 5998-01-541-9243
NSN 6620-01-362-5432
NSN 5895-01-531-7013