Patent ID: 8216076

Claim:
A method for manufacturing a hardened steel locking washer, including an anti-corrosion coating, said washer having a first side and a second side, and including a pattern of teeth on said first side of said washer and a pattern of cams on said second side of said washer, the method comprising the steps of providing a low-alloy steel washer, having a carbon content greater than 0.25% by weight, hardening said low-alloy steel washer by heating to an austenitizing temperature and subsequent quenching to convert said low-alloy steel washer into a hardened low-alloy steel washer, and applying a basic coating comprising zinc flakes non-electrolytically onto said hardened low-alloy steel washer to convert said hardened low-alloy steel washer into said hardened steel locking washer having a hardness over 500 HV.