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 6135-01-340-9731
NSN 5935-01-567-4278
NSN 5985-00-064-3958
NSN 5990-01-116-2181
NSN 4140-01-092-1098
NSN 5935-00-575-9049
NSN 5895-01-415-4739
NSN 6240-01-467-3341
NSN 5996-01-587-2082
NSN 6645-01-361-8947
NSN 5895-01-465-7639
NSN 5950-01-634-0677