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 5990-01-013-8464
NSN 6620-01-025-4690
NSN 5925-01-526-3328
NSN 6650-00-166-7160
NSN 2925-00-520-9546
NSN 4140-01-527-4341
NSN 5925-01-659-5405
NSN 5935-00-932-5241
NSN 5996-01-127-5431
NSN 5975-01-045-2159
NSN 6610-01-275-9771
NSN 5835-01-286-6499