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 5905-01-469-2424
NSN 6620-00-408-5478
NSN 6110-01-548-8864
NSN 5925-00-580-0869
NSN 6145-00-528-6467
NSN 6130-01-126-0455
NSN 5999-01-377-5248
NSN 4140-01-569-9714
NSN 7035-01-647-4897
NSN 5950-01-261-7938
NSN 6110-01-453-2402
NSN 6220-01-579-3138