FASTENERS Mechanical fastening systems with a steel rod and a polymer head. This fastener is used to transfer loads from a façade onto a wall structure. Its role is to transfer axial tensile forces, caused by the suction effect of wind, protecting the boards from coming off the wall.

 The grab strength of the fastener depends on the friction force between the expanding section of the fastener and the inner surface of the borehole. The force varies according to the substrate type as well as the insertion depth and expansion capacity of the fastener. Apart from its function as an installation element, the fastener is intended to reinforce the initial bonding strength of the adhesive.