An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 5996-00-948-6748
NSN 5975-01-201-4353
NSN 6130-01-081-3412
NSN 5965-01-215-0993
NSN 5960-00-672-3836
NSN 5960-01-509-8779
NSN 6220-00-834-1852
NSN 6110-00-042-4712
NSN 6150-01-410-9061
NSN 5999-00-012-5542
NSN 6150-00-616-1541
NSN 5910-01-359-9177