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 2925-01-456-6840
NSN 5990-01-154-7296
NSN 6620-00-366-1365
NSN 5935-01-123-4699
NSN 6320-01-365-2701
NSN 6220-01-521-7978
NSN 6150-00-100-4373
NSN 6645-00-456-2219
NSN 6240-01-433-3212
NSN 6320-01-605-7059
NSN 5950-01-641-2901
NSN 5999-01-121-9531