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 5835-01-602-0311
NSN 6685-01-099-3933
NSN 5998-01-376-3644
NSN 6110-00-250-5949
NSN 5895-00-632-0901
NSN 6130-01-465-1354
NSN 5965-01-472-1997
NSN 5910-01-048-4293
NSN 6610-01-541-7422
NSN 6320-01-350-0320
NSN 5965-01-470-0393
NSN 6685-01-417-8168