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 5965-01-586-9717
NSN 6105-01-235-5254
NSN 5999-00-348-2473
NSN 6135-00-539-8088
NSN 6645-01-329-1779
NSN 6110-00-525-3418
NSN 5950-00-836-9724
NSN 5998-01-588-7433
NSN 5975-01-200-7710
NSN 6650-01-503-4469
NSN 5990-01-223-4711
NSN 6130-00-879-9887