(under subclass 531) Subject matter wherein the element is formed with folds defining a series of alternating grooves and ridges on the opposed faces thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
161, for a washer having ridges or grooves extending more or less radially across its axially facing surfaces, and wherein the washer is disclosed as being a component of a bolt-to-substructure, or a nut-to-substructure, locking arrangement.
