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 6320-01-125-3361
NSN 5985-01-101-6165
NSN 6645-01-511-3272
NSN 5975-01-042-8693
NSN 7035-01-399-5354
NSN 7035-01-659-2644
NSN 6620-00-564-9412
NSN 5960-01-649-1341
NSN 5905-00-516-2871
NSN 5925-00-088-8312
NSN 6620-01-414-4578
NSN 5985-01-449-1318