Patent ID: 8641344

Claim:
A panel fastener comprising: a head member; a shank depending from said head member, the shank comprising a first end attached to the head member and a second end opposite the head member, an unthreaded section extending from the first end to an axial position along the shank where a threaded section begins, the threaded section extending to the second end; the second end comprising a tip, the tip comprising an axial aperture extending from an opening in the tip to a termination within the shank adjacent to the threaded section; the threaded section further comprising axially aligned openings on opposite facing sides of the shank, the openings penetrating through to the axial aperture; and a spring member comprising a closed end and two legs depending from the closed end, each leg commencing with an outwardly facing shoulder and terminating with an outwardly extending pawl, each pawl comprising a bottom facing said tip, a first portion of said bottom being perpendicular to the axis defined between the first end and the second end, and a second portion of said bottom being angled to allow insertion of said fastener into an aperture; wherein the spring member is disposed within the axial aperture with the closed end adjacent to the termination and a portion of each leg extendable into the respective axially aligned opening adjacent to each leg.