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 5915-01-414-6433
NSN 6130-00-578-9783
NSN 5990-00-351-5479
NSN 5920-00-130-3593
NSN 5985-01-349-9183
NSN 4140-00-184-4812
NSN 6220-01-108-5105
NSN 7035-01-317-4227
NSN 6145-01-608-6233
NSN 6220-01-019-4090
NSN 5975-00-987-5352
NSN 5999-01-364-9003