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 5895-00-401-8601
NSN 7035-00-572-7086
NSN 5998-01-322-9986
NSN 6620-00-373-9349
NSN 6135-00-080-9176
NSN 6320-01-567-9792
NSN 2925-01-418-8106
NSN 5895-01-582-6116
NSN 5990-01-246-7417
NSN 2925-00-596-9775
NSN 6135-01-435-8451
NSN 5950-01-533-3239