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 5905-01-303-3895
NSN 5935-00-639-1382
NSN 6645-01-218-5234
NSN 6610-01-507-9476
NSN 6650-00-181-8376
NSN 6105-00-797-6258
NSN 2925-00-111-4097
NSN 5998-01-189-5336
NSN 5996-00-272-2560
NSN 5945-00-482-9822
NSN 6610-01-307-6363
NSN 5905-00-443-9490