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 6150-01-425-2807
NSN 5965-01-429-6726
NSN 6240-01-160-4370
NSN 5996-00-681-0490
NSN 6645-01-089-6459
NSN 6110-01-236-8358
NSN 5999-01-432-2147
NSN 2925-00-263-2714
NSN 5990-01-599-4721
NSN 5985-01-290-0817
NSN 5990-00-956-9130
NSN 5925-01-651-9635