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 5990-01-307-4489
NSN 5925-01-641-2879
NSN 6145-00-278-0697
NSN 6135-01-507-4346
NSN 6130-00-438-9271
NSN 5996-01-491-0178
NSN 6620-01-633-8443
NSN 5975-01-441-4012
NSN 5985-01-107-3360
NSN 5985-01-423-1491
NSN 6145-01-089-9230
NSN 6150-00-420-8613