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 5999-01-241-3653
NSN 5998-00-172-7619
NSN 5930-01-529-2377
NSN 5930-00-369-0614
NSN 6240-00-153-8929
NSN 4140-00-960-4310
NSN 5910-00-765-3276
NSN 5990-01-332-6722
NSN 5950-00-097-9565
NSN 5990-01-270-3209
NSN 6650-01-161-9876
NSN 2925-01-390-7963