A device for torque limiting, which includes a nut and a holding element including a top part having an entrainment profile in a rear area for the rotatably fixed coupling of the top part with a setting tool. A receiving part has a receptacle in a front area of the holding element, in which the nut is rotatably fixedly accommodated. A device for torque transmission from the top part to the receiving part connects the top part and the receiving part and breaks at a limiting torque, interrupting the connection between the top part and the receiving part. The holding element includes at least one holding claw situated on the receiving part and securing the nut in the receptacle on the front side of the nut. A fastening arrangement made up of an expansion anchor and a device of this type for torque limiting as well as a method for manufacturing a device of this type.

An expansion anchor including an anchor bolt, and at least one expansion shell, wherein the anchor bolt includes a wedge zone for expanding the at least one expansion shell, a neck zone accommodating at least parts of the expansion shell, the neck zone being located rearwardly of the wedge zone, an abutment zone forming a rearward stop for the expansion shell, the abutment zone being located rearwardly of the neck zone, an intermediate zone, the intermediate zone being located rearwardly of the abutment zone, and a rear zone for intruding tensile force into the anchor bolt, the rear zone being located rearwardly of the intermediate zone, wherein the anchor bolt is, within the neck zone, provided with at least one longitudinally running neck zone groove, and wherein the anchor bolt is, within the intermediate zone, provided with at least one longitudinally running intermediate zone groove.

An expansion anchor includes an anchor bolt, an expansion sleeve as a first element where the expansion sleeve surrounds the anchor bolt, a wedge body for expanding the expansion sleeve as a second element where the wedge body is disposed on the anchor bolt, and a double coating disposed on one of the first and second elements at least in an area of contact with the other of the first and second elements. The one of the first and second elements on which the double coating is disposed is carbon steel. The double coating has a zinc flake and/or an aluminum flake top layer and a hot dip galvanized zinc, a ZnNi, or a ZnFe base layer that is covered by the zinc flake and/or the aluminum flake top layer.

A device for torque limiting is provided, including a holding element for a nut or a screw head, the holding element including a top part having an entrainment profile in a rear area of the holding element for the rotatably fixed coupling of the top part with a setting tool, and the holding element including a receiving part having a receptacle in a front area of the holding element for rotatably fixedly accommodating the nut or the screw head. According to the invention, the holding element includes three torque-transmitting webs, which connect the receiving part and the top part and which form a predetermined breaking point. The invention also relates to a fastening arrangement made up of a device of this type and an expansion anchor.

A post installation bracket for installing posts on a base such as a concrete slab is provided. The post installation bracket includes a leveling plate with at least one leveling element and an anchoring bolt securing assembly configured to securely receive a first end of an anchoring bolt, a second end of the anchoring bolt distal to the first end securely anchored into the base. The post installation bracket further includes at least one leveling bolt securely fastened to each of the at least one leveling elements, the at least one leveling bolt used to position the leveling plate and post with respect to the base.

An expansion anchor including an anchor bolt, and at least one expansion shell located at the anchor bolt, wherein the anchor bolt includes a wedge zone for expanding the at least one expansion shell, a neck zone accommodating at least parts of the expansion shell, the neck zone being located rearwardly of the wedge zone, an abutment zone forming a rearward stop for the expansion shell, the abutment zone being located rearwardly of the neck zone, and a rear zone for intruding tensile force into the anchor bolt, the rear zone being located rearwardly of the abutment zone, wherein the anchor bolt is provided with at least one forwards groove, located in front of the abutment zone. The anchor bolt is provided with an aligned rearwards groove, which is aligned with the at least one forwards groove, and which is located rearwardly of the abutment zone.

An expansion anchor including an anchor bolt, and at least one expansion shell located at the anchor bolt, wherein the anchor bolt includes a wedge zone for expanding the at least one expansion shell, an abutment zone forming a rearward stop for the expansion shell, the abutment zone being located rearwardly of the wedge zone, and a rear zone for intruding tensile force into the anchor bolt, the rear zone being located rearwardly of the abutment zone, and wherein, located between the abutment zone and the rear zone, and spaced from the abutment zone, the anchor bolt includes a bulged zone, which radially protrudes on the anchor bolt.

A self-drilling anchor assembly including a drill bit and an anchor positioned over and attached to the drill bit. In various embodiments, the drill bit includes a shank, a drill head integrally connected to one end of the shank, and a threaded tail integrally connected to an opposite end of the shank. The tail includes a mechanical engaging structure that is engageable by a tool to rotate the drill bit, and a helical thread formation to facilitate attachment of a securing device such as nut and washer to the tail of the drill bit. The anchor includes an elongated generally tubular body including an inner surface defining a longitudinally extending inner channel, and a head integrally connected to and extending from a first end of the body. The drill bit is configured to remain in the anchor and in the substrate after installation of the anchor assembly in the substrate.

A fastening system is provided, including an anchor (1), which has an anchor area (22) in a front area (32) for anchoring the anchor in a hole (99) in a substrate (5), and a load receiving device (18) in a rear area (33) for introducing a tensile force. A sensor (40) is provided for measuring a distance of the front area from a reference position of the substrate. A measuring method, using a fastening system of this type is also provided.

A fastening device is provided for forming a joint between two edge to edge panels arranged to either side of a central panel. The fastening device is of the kind including an elongate dowel and a sleeve, with the dowel having a head at one end, an expander at the other end and a shank extending between the two. The expander co-operates with an expandable region of the sleeve to cause the expandable region to expand radially outwardly upon relative axial movement between the dowel and sleeve. The expandable region of the sleeve is arranged to expand in a non-uniform manner, with a greater degree of expansion being caused at a free end of the sleeve.