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 5895-00-068-3778
NSN 5996-00-209-9105
NSN 6150-00-985-1594
NSN 6150-01-005-5789
NSN 5945-01-451-7457
NSN 5945-00-917-9714
NSN 5985-01-249-6926
NSN 5998-01-366-0759
NSN 5935-01-158-8187
NSN 7035-01-081-5797
NSN 6110-01-347-0954
NSN 5950-01-533-2009