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 5835-01-190-5192
NSN 5920-00-351-8428
NSN 6130-00-937-9625
NSN 5998-00-247-3786
NSN 6645-01-355-5067
NSN 4140-01-355-5628
NSN 6650-00-388-4517
NSN 6220-01-237-2488
NSN 5990-01-161-4625
NSN 5935-00-633-8302
NSN 5950-01-619-8592
NSN 5930-00-815-2861