Patent ID: 8899895

Claim:
A fastener for use in a high vibration application, the fastener comprising: a nut comprising: a nut body comprising: a cam surface comprising wedge locking action fastening features; and a hex shape upon an outer surface of the nut body; and a locking washer comprising: matching wedge locking action fastening features to the wedge locking action fastening features of the cam surface; and a matching hex shape upon an outer surface of the washer to the hex shape upon the outer surface of the nut body; wherein the nut is configured to include: a threaded inner surface selected according to a bolt to be fastened; and a nut wall thickness selected according to a load to be applied to the nut; and wherein the wedge locking action fastening features include a planar should feature cam surface configured to prevent the fastener from turning relative to the lock washer in a tightening direction and comprising a planar shoulder feature slope angle of between forty degrees and fifty degrees between the shoulder feature cam surface and a radial plane extending normal to the rotational axis of a shank of the fastener.