A fastening device including a fastener having a head portion and an elongated threaded body portion extending axially from the head portion. The threaded body portion includes opposing flat sections. A lock washer has a lower surface with an array of radially extending engagement teeth. The lock washer also defines an axial aperture for receiving the fastener. The axial aperture has two flat inner surfaces for cooperating with the two flat sections of the threaded body portion to prevent relative rotation of the washer and threaded body portion. A threaded lock nut mates with the threaded body portion. The lock nut has an upper surface with at least one cantilevered pawl members for ratcheted engagement with the array of radially extending engagement teeth of the lock washer.