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 5920-00-256-6589
NSN 6135-01-010-0891
NSN 6610-00-374-1563
NSN 5950-00-006-9040
NSN 5985-01-429-5716
NSN 6320-00-343-1798
NSN 6650-01-553-2805
NSN 5925-00-879-5108
NSN 5975-00-507-7670
NSN 5895-00-148-8386
NSN 5930-01-562-4354
NSN 6620-01-288-2627