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 6645-01-314-2889
NSN 5985-01-560-1157
NSN 5855-00-160-2286
NSN 5965-00-234-0219
NSN 6145-00-809-2368
NSN 6240-01-420-5905
NSN 6610-00-700-3679
NSN 6220-00-357-9534
NSN 5935-01-657-2595
NSN 6135-01-164-3561
NSN 4140-00-757-3047
NSN 5975-01-420-6591