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 6650-01-491-6733
NSN 2925-01-336-8019
NSN 6685-01-552-6578
NSN 5835-01-013-8797
NSN 5975-01-514-6629
NSN 6220-01-337-7789
NSN 6685-01-487-8713
NSN 2925-01-540-7389
NSN 6320-01-343-8191
NSN 5945-01-444-6440
NSN 5895-01-296-4692
NSN 4140-01-502-9649