Plastic-headed fastener assembly

Claim 1

A plastic-headed fastener assembly for use in attaching a first panel of a first thickness to a second substantially thicker member comprising a metal screw fastener having a threaded shank and having a head at one end thereof, said head having rotation inducing surfaces, the threads beneath the head having a first outside diameter; a plastic head member overlying the metallic head and being affixed thereto, said plastic head mating with and transmitting the rotational forces to the metallic head, a first outer sealing flange of the plastic head member extending outwardly and downwardly from the edge of the underlying metallic head, said downward extent being for a first axial distance relative to the screw, a second inner sealing flange extending generally downwardly and substantially parallel to the axis of said fastener for a second axial distance relative to the screw, said second axial distance being substantially greater than said first axial distance, the second sealing flange having an inside diameter which is greater than said first outside diameter by at least several times the first panel thickness whereby said second sealing flange acts to prevent the creation of significant friction between the plastic head member and the panel being attached by allowing said fastener to easily strip out a hole in said first panel before fully engaging said second member.