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 4140-01-519-9343
NSN 5925-01-011-2202
NSN 6320-01-389-8128
NSN 5835-00-060-9889
NSN 6220-00-994-5033
NSN 5999-01-263-2566
NSN 5960-01-331-3817
NSN 5945-00-823-3030
NSN 5915-01-423-4642
NSN 6240-01-052-5971
NSN 5996-01-467-9391
NSN 6320-00-790-4844