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 5990-00-399-2454
NSN 7035-01-027-8569
NSN 6135-00-715-4001
NSN 4140-00-420-0251
NSN 5855-00-138-2386
NSN 6645-00-806-6961
NSN 6220-01-415-3115
NSN 6685-01-364-8552
NSN 6240-01-471-4180
NSN 6650-01-519-9165
NSN 5998-01-651-3356
NSN 5835-01-093-3211