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 6645-00-149-1100
NSN 5985-00-215-7922
NSN 2925-01-603-6379
NSN 6645-01-384-7791
NSN 4140-01-468-2975
NSN 5920-01-300-6055
NSN 6105-01-448-0936
NSN 5960-01-442-9304
NSN 6150-00-853-3348
NSN 6135-01-136-8306
NSN 6130-00-696-8309
NSN 6240-01-359-4288