Importance

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Abstract

A ground connection with a grounding screw having a countersunk head with a countersinking region and having a cylindrical threaded shaft, proceeding from the countersunk head, for the mechanical and electrical connection of a first sheet-metal part to another metal part is described, wherein the first sheet-metal part resting on the head side of the grounding screw has a varnish layer on all sides, said varnish layer is broken through by a protrusion, proceeding from a countersinking region of the head, when the screw is tightened, wherein the head-side borehole is cylindrical and provided with a diameter D1 that is slightly smaller than the head diameter D2 of the head, and wherein the sheet edge of the first sheet-metal part uses, as counterbearing, the oblique circumferential surface of the grounding screw, which cuts through the varnish when the screw is tightened, without creating varnish chips. At the same time, the segment cutting edge or protrusion centres the grounding screw in the cylindrical borehole.

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First Claim