A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide additional bearing area on the material being fastened. It may or may not have a flush flange feature.
Classification: Copper washers including spring washers not threaded
NSN 5990-00-924-4167
NSN 5950-00-188-9839
NSN 2925-01-645-2948
NSN 2925-01-089-6269
NSN 6105-00-960-6327
NSN 5996-00-081-3175
NSN 6320-00-701-0437
NSN 6685-00-148-4847
NSN 6135-01-365-2707
NSN 5835-01-547-6892
NSN 5996-01-196-4502
NSN 6240-00-889-8442