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 6620-01-542-2689
NSN 5996-00-504-6761
NSN 6130-01-528-5770
NSN 5965-00-052-9184
NSN 5905-00-067-7364
NSN 5990-01-586-8202
NSN 5905-00-721-3745
NSN 5920-00-372-5864
NSN 6150-00-046-2425
NSN 4140-01-497-9992
NSN 5915-01-090-3191
NSN 6145-00-581-1622