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 6685-00-473-4920
NSN 6220-01-470-3301
NSN 5945-00-823-6156
NSN 6610-00-292-9895
NSN 5999-00-236-2566
NSN 5930-00-272-8876
NSN 5895-00-759-8205
NSN 6150-01-050-9362
NSN 5975-01-526-2273
NSN 5985-00-597-2966
NSN 4140-00-865-1535
NSN 5950-01-524-5823