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 5855-01-260-7445
NSN 5985-01-109-4201
NSN 5950-01-172-9668
NSN 5855-01-442-7929
NSN 5855-01-503-0144
NSN 6650-01-199-0570
NSN 4140-00-544-6873
NSN 5975-01-358-0851
NSN 5910-00-942-0399
NSN 5975-01-601-5252
NSN 6135-01-630-7662
NSN 6105-01-063-2158