Patent ID: 8517651

Claim:
A component assembly comprising a sheet metal part and at least one functional element having a longitudinal axis, a body section, a hollow piercing section, an annular contact surface at the body part, which extends substantially perpendicular to the longitudinal axis and radially away from the piercing section and an axially extending ring groove which is provided in the body section radially inside the contact surface, with the functional element being designed for attachment to a component which is of planar shape at least in the region of the attachment, to the sheet metal part, wherein the body section has a pressing surface at the side remote from the piercing section; wherein ribs providing security against rotation are provided which cross the ring groove at least in part; wherein the hollow piercing section has a free end face provided with a circular cutting edge having an edge diameter, wherein a peripheral bead having an apex with an apex diameter is provided at the piercing section between the annular contact surface and the free end face of the piercing section; wherein a ring recess is provided around the piercing section axially between the bead and the free end face of the piercing section and wherein the edge diameter is of the same seize as the apex diameter; wherein material of the sheet metal part contacts the contact surface and at least substantially fills out the ring groove and wherein the sheet metal part has a piercing in the region of the piercing section through which the piercing section extends, with the bead being received in an annular groove in a marginal zone of the piercing.