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 5910-01-230-0713
NSN 4140-00-415-6513
NSN 5855-00-951-6483
NSN 2925-00-183-4390
NSN 5935-01-167-7060
NSN 4140-01-632-6958
NSN 5935-01-091-1285
NSN 5935-00-169-4271
NSN 6685-00-559-2742
NSN 5990-01-601-7332
NSN 5925-00-804-4412
NSN 4140-01-655-3052