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 5998-01-416-0734
NSN 6130-00-820-4986
NSN 5915-01-160-8993
NSN 6105-01-045-5128
NSN 5930-01-181-4877
NSN 5996-00-463-1806
NSN 7035-01-242-6496
NSN 5905-01-634-0595
NSN 6645-00-684-3424
NSN 5985-00-942-1154
NSN 5915-00-225-9506
NSN 5975-00-549-9431