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 6220-01-435-4839
NSN 5950-01-053-6595
NSN 5910-00-010-4874
NSN 6240-01-364-8696
NSN 6610-01-648-6527
NSN 6620-01-574-1862
NSN 6130-01-025-5995
NSN 6145-00-526-3056
NSN 6645-00-787-0651
NSN 6610-01-498-0524
NSN 5925-01-497-9874
NSN 5895-01-082-4065