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 5985-00-317-8237
NSN 6320-00-521-9350
NSN 5960-01-323-6432
NSN 6645-00-518-2068
NSN 6645-00-819-5045
NSN 6145-01-570-3895
NSN 6220-01-634-0660
NSN 4140-01-219-3096
NSN 5975-01-277-6344
NSN 5985-00-422-5337
NSN 5975-00-621-0152
NSN 5920-01-374-1104