Patent ID: 7934297

Claim:
A twist off tamper-proof fastener that requires destruction for removal, comprising in combination: an elongate strap having a first side portion, an opposing second side portion and tapered to a rounded tip at one end portion; plural parallel adjacent transverse teeth defined in the first side portion and in the second side portion; a head portion interconnected with the elongate strap opposite the rounded tip, the head portion having, a rigid substantially planar configuration with a first wing at one lateral edge and a spaced apart second wing at opposing lateral edge, the first wing and the second wing defining a first planar marking side and an opposing second planar marking side for marking indicia, a T slot frame to prevent tampering between the first wing and the second wing defining a T slot channel therethrough communicating from the first planar marking side to the opposing second planar marking side proximate the interconnection with the elongate strap, the T slot channel having, a parallel portion spacedly adjacent and aligned with the elongate strap communicating with a transverse portion distal from the elongate strap, the transverse portion having dimensions substantially similar to dimensions of the elongate strap to allow the elongate strap to pass therethrough and to positionally secure the elongate strap within the transverse portion of the T slot channel to reduce likelihood of tampering, an immovable fingernail tooth within the transverse portion opposite the parallel portion for engagement with transverse teeth defined in one side portion of the elongate strap, a flexing arm within the parallel portion having at least one tooth on an end portion proximate the fingernail tooth for engagement with transverse teeth defined in the opposing side portion of the elongate strap; a notch defined in and extending circumferentially about the elongate strap immediately adjacent the head portion that creates reduced resistance to shearing forces but is resistant to tensive forces; the rounded tip and a length of the elongate strap may pass through the transverse portion of the T slot channel in only one direction and not removed therefrom; the twist off fastener must be destroyed to be removed; and the fastener is breakable without tools by a user manually grasping and twisting the head portion using the first and second wings for leverage which focuses shearing forces at the circumferentially extending notch causing the fastener to break at the circumferentially extending notch.