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: Cotters, cotter-pins, washers and similar articles, of aluminum
NSN 5915-01-325-0402
NSN 5990-01-147-5225
NSN 6685-01-154-0194
NSN 6145-01-453-3410
NSN 6620-01-147-5615
NSN 6320-00-004-9158
NSN 4140-00-142-2491
NSN 6105-00-726-8684
NSN 5999-01-461-7968
NSN 5910-00-936-1978
NSN 7035-01-231-2450
NSN 5935-01-251-8390