Nut and washer assembly

Claim 1

A fastener assembly comprising: a washer member molded from plastic and including a skirt portion having a sealing face and a reduced diameter end portion integrally joined to said skirt portion by a collar section interposed between said skirt and end portions, a fastener receiving aperture for receiving the threaded shank of an elongated threaded fastener, said aperture extending generally centrally through said skirt portion, said end portion and said collar portion,at least the portion of said aperture associated with said skirt portion being devoid of threads; a generally cup-shaped metal nut means having an internal open configuration generally corresponding to said end portion positioned over and enclosing said end portion and press fitted thereto for driving rotation therewith, said nut means having side walls terminating above said skirt portion and further including a threaded opening aligned with said aperture and adapted to threadedly receive the shank of an elongated threaded fastener extending through said aperture; and, said collar section having a width substantially less than said end portion and a conformation to facilitate fracture thereof when a predetermined torque load is applied between said skirt portion and end portion for allowing said skirt portion and end portions to be rotated relative to each other.