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 5835-01-616-6131
NSN 5999-00-599-1705
NSN 6685-01-103-3143
NSN 6620-00-941-5672
NSN 6320-01-036-2598
NSN 5965-01-521-3224
NSN 6220-01-634-0660
NSN 5990-00-936-3947
NSN 6610-01-478-4392
NSN 5996-01-213-5184
NSN 6645-00-948-9763
NSN 5925-00-283-1410