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 6110-00-778-1839
NSN 6105-00-454-5767
NSN 6320-00-149-7570
NSN 5930-00-679-5096
NSN 6620-01-032-3937
NSN 6150-01-554-0977
NSN 2925-00-485-0543
NSN 5950-01-451-7682
NSN 5950-01-555-5162
NSN 6130-01-527-3523
NSN 7035-01-049-6776
NSN 6610-01-391-6781