Abstract: A bolt seal protector includes a V-shape or trapezoidal shape set of side and front walls. A set of transverse walls are attached to the side walls in the interior space defined by the side and front walls and include bolt shank receiving apertures. The transverse walls are attached to the side walls by projections. Top and bottom walls may be provided to enhance security. Flanges may be attached to the side walls. The flanges may extend inwardly or outwardly relative to the interior space at the top and bottom side wall edges. The transverse walls are recessed for receiving the bracket of a hasp of a keeper bar assembly which hasp is received between the transverse walls. Slots are provided in the side walls to receive a keeper bar handle and to provide clearance for hasp bracket fasteners and the like. Different thickness walls and flange shapes are provided for a given security need. Different embodiments are disclosed including a tool for use with certain of the embodiments.

Abstract: A steel bolt has weakening grooves at one end to which a head is swaged, the head having two frusto-conical portions at opposite ends. One end has a frusto-conical step for receiving a pair of jaws of a bolt breaking tool. A resilient spacer is attached to the bolt next to the head for limiting the depth of entry of the bolt head into a hasp hole, to provide access clearance for the tool and to permit the bolt to tilt to assist in breaking the bolt. The spacer is received in one hasp hole smaller in diameter than a second hasp hole to limit the depth of insertion of the spacer and the bolt head tapered end portion into the hasp. A seal with a conventional locking mechanism has a frusto-conical end region which partially engages the other hasp hole. The bolt and seal cooperate to lock the seal axially at different positions so the seal is engaged with one hasp hole and the bolt head engaged with the other hasp hole.

Abstract: A lock body through bore receives a steel bolt with an array of annular grooves. A locking mechanism secured in the bore has an annular array of locking jaws normally biased engaged with an inserted bolt groove. A jaw spreader has a conical surface for spreading the jaws radially outwardly to disengage the bolt. A locking member normally is radially outwardly of the jaws to preclude such spreading. A spring with a high spring constant, e.g., 300 pound load, axially biases the locking member in the jaw locking position. The spreader and locking member define a locking jaw conical path for radially outwardly releasing the jaws during bolt insertion and for locking the jaws in the opposite bolt withdrawal direction.