Abstract: A security device, comprising, a bolt, comprising, a head, wherein the head comprises at least one functional marker; and a hollow cylinder, the hollow cylinder comprising a bolt internal threaded surface and a bolt external threaded surface, wherein the bolt internal threaded surface extends through the head; and a nut, comprising, a first nut cylinder, wherein the first nut cylinder is internally grooved threaded and of the same diameter as the bolt external threaded surface; and a second nut cylinder, whereby the second nut cylinder is capable of containing the head of the bolt when the bolt external threaded surface is securely screwed into the first nut cylinder. A bolt, the bolt further comprising at least one functional marker, and where the bolt is externally threaded in reverse.