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 6110-00-553-6159
NSN 5950-01-381-5610
NSN 5920-01-104-9190
NSN 6105-00-388-1602
NSN 5925-01-304-0372
NSN 5915-00-747-9679
NSN 5835-01-373-9506
NSN 6130-00-677-4085
NSN 5960-01-030-6407
NSN 5935-01-640-7385
NSN 4140-00-007-9639
NSN 6130-00-074-5324