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 5905-01-529-4781
NSN 6685-01-634-0611
NSN 6130-01-330-2714
NSN 5920-01-632-5891
NSN 5965-00-006-8004
NSN 6610-00-735-9555
NSN 6685-00-409-4970
NSN 5835-00-034-4976
NSN 5985-01-447-0139
NSN 6620-00-488-0626
NSN 5999-01-446-7248
NSN 5835-00-113-6090