Abstract: A bolt is provided for fastening a component or a ground connection of electrical or electronic components to a vehicle body. The bolt has a head portion with an external thread, the head portion being formed from a steel material, and a foot portion. The foot portion is formed from an aluminum alloy and is connected integrally to the head portion by a friction-weld connection. The bolt is configured in the form of a welding stud for drawn arc stud welding, for which purpose it has an ignition tip on its end side, which delimits the foot portion.

Abstract: A ground connection for an aluminum component has grounding bolt which is fastened to the component, with an adapter over the surface, and which is composed of a material having greater strength than the aluminum component and differs from the aluminum component in electrochemical series and has a thread element which clamps the cable shoe of the ground conductor on a corresponding contact area of the grounding bolt. Permanently high functional reliability is obtained by the grounding bolt and the adapter being composed of materials matched to one another so as to prevent corrosion and connected to one another in a cohesive manner, and the adapter is zinc-plated on the component side and is fastened to the component over a large surface area by a welded/soldered connection which is established using aluminum as an additional material.

Abstract: A bolt is provided for fastening a component or a ground connection of electrical or electronic components to a vehicle body. The bolt has a head portion with an external thread, the head portion being formed from a steel material, and a foot portion. The foot portion is formed from an aluminum alloy and is connected integrally to the head portion by a friction-weld connection. The bolt is configured in the form of a welding stud for drawn arc stud welding, for which purpose it has an ignition tip on its end side, which delimits the foot portion.

Abstract: A ground connection for an aluminium component, in particular an aluminium vehicle body component, has grounding bolt which is fastened to the component, with the interposition of an adapter that extends over the surface, and which is composed of a material which exhibits greater strength than the aluminium component and differs from the aluminium component in terms of the electrochemical series, in particular steel, and has a thread element which clamps the cable shoe of the ground conductor on a corresponding contact area of the grounding bolt.

Abstract: A method is provided for permanently joining a first metallic component that is formed from a 5000 series aluminum alloy material and a second metallic component that is formed from a steel alloy material. One of the first and second components is provided with a layer of an aluminum alloy material that is different from the 5000 series aluminum alloy material used to form the first and second metallic components, such as a layer of a 6000 series aluminum alloy material. The layer of the 6000 series aluminum alloy material can be provided as a coating on the selected one of the first and second components or in solid form. After the layer of the 6000 series aluminum alloy material can be provided on the selected one of the first and second components, the first and second components are secured together without the application of heat, such as by magnetic pulse welding, friction welding, and the like.