Patent ID: 8690507

Claim:
A fastener assembly comprising: a threaded fastener having a seating surface normal to an axis of the threaded fastener; at least three coaxial washers positioned normal to the axis, wherein an innermost washer engages the seating surface, an outermost washer is adapted to engage a clamping surface, and an interposed washer is positioned therebetween, each of the innermost washer, the outermost washer and the interposed washer having opposing flat faces parallel to each other in an unstressed condition to engage one another face to face; and a locking mechanism to combine the washers to the threaded fastener in a manner which allows independent movement of the washers, the locking mechanism engaging the outermost washer such that an entirety of the locking mechanism is axially recessed away from an outermost of the flat faces of the outermost washer in an axial direction toward the innermost washer.