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 5950-01-577-4410
NSN 4140-00-228-3661
NSN 6145-00-498-8288
NSN 6110-01-406-4818
NSN 5895-01-294-5761
NSN 5996-01-487-7323
NSN 5998-01-040-3800
NSN 6650-01-044-0183
NSN 5935-01-497-9241
NSN 5915-01-131-2088
NSN 6145-01-646-1232
NSN 7035-01-286-1075