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 6645-00-171-9639
NSN 6220-00-515-6998
NSN 6220-01-184-3052
NSN 6610-01-469-8904
NSN 6150-01-196-5871
NSN 5960-01-123-8775
NSN 6320-01-441-2438
NSN 5965-01-084-6921
NSN 5999-00-877-3799
NSN 6145-00-827-4958
NSN 7035-01-220-6392
NSN 6145-01-344-9709