Title: Method of fabricating a fastener assembly

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Abstract: The present disclosure relates to a novel externally threaded fastener unit and the novel combination resulting from employment of said unit with an internally threaded element, such as a nut or the like, and the method of manufacture thereof. The fastener unit includes a headed screw member having a frusto-conical washer preassembled thereon and held in captive relation by the external thread form. Disposed adjacent the threaded portion of the screw member is an unthreaded neck section of a controlled cross-sectional dimension. This neck section is designed to have a dimension which is less than the minimum minor dimension of an internal thread designed in accordance with industry specified dimensions and tolerances for mating engagement with the external thread on said fastener. Thus, the screw member may be advanced along the internally threaded portion of said element, with said internal threads passing over the unthreaded neck section, without producing interfering engagement therewith, such that effective compression of the frusto-conical washer can be obtained regardless of the relative thinness of the workpieces being clamped with the fastener unit.


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