Patent ID: 6854942

Claim:
A fastener for joining an object to another structure and comprising a head having a portion adapted for receiving torque to rotate said fastener, and an annular tapered portion joined to said torque receiving portion, and a shank joined to and extending from said annular tapered portion and terminating in a point adapted to extend through a preformed aperture in said object or create such an aperture as it is rotatably forced against said object, said shank having a primary thread continuously extending along its periphery from at least a location removed from said head and ending at said annular tapered portion in a primary terminus along the circumference of said shank, said primary thread having a pitch and being spirally wound about said shank in convolutions spaced to create a continuous, unthreaded portion of said shank between said primary thread convolutions, and a supplemental thread located in at least a part of said continuous unthreaded portion of said shank between said primary thread convolutions, said supplemental thread ending at said annular tapered portion in a supplemental terminus spaced from said primary terminus along the circumference of said shank.