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 5855-01-408-3154
NSN 5950-00-883-1830
NSN 5910-01-316-8955
NSN 6610-01-535-0310
NSN 5895-01-527-1134
NSN 5996-01-642-0409
NSN 6320-01-362-9518
NSN 6240-00-156-1607
NSN 6150-01-331-5686
NSN 4140-01-364-2913
NSN 6685-00-722-7210
NSN 5999-01-145-5084