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 5895-01-206-1330
NSN 6620-00-893-1303
NSN 6145-00-051-9790
NSN 5960-00-808-6935
NSN 6610-00-598-5268
NSN 7035-00-782-7046
NSN 5855-01-426-5589
NSN 4140-01-126-5989
NSN 6135-00-255-1340
NSN 5835-00-918-8169
NSN 5910-00-419-0330
NSN 6240-01-521-2635