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 5985-00-696-7989
NSN 5990-00-759-9305
NSN 5905-01-287-6770
NSN 5960-01-567-1096
NSN 5960-01-449-1310
NSN 6650-01-029-5414
NSN 6645-00-915-9397
NSN 5915-01-179-4809
NSN 5855-01-007-9541
NSN 6130-00-891-8800
NSN 5965-01-173-2486
NSN 6240-01-013-8895