Patent ID: 6997519

Claim:
A sheet-metal center disk wheel for a motor vehicle, comprising: a wheel-center disk ( 1 ) provided with a plurality of bolt holes ( 3 ) distributed along a hole circle ( 2 ), each bolt hole having a through-hole ( 4 ) surrounded by a countersink ( 7 ) having a surface provided with elevations and indentations including at least 3 elevations or at least 3 indentations, at least the indentations being provided with a protective coating, the elevations having contact surfaces configured and dimensioned to contact a centering collar of a wheel bolt or a wheel nut, when the center disk wheel is mounted on the wheel hub or brake drum of a motor vehicle, and wherein the protective coating remains on said indentations and the contact surfaces are substantially free of protective coating, after the contact surfaces are contacted by said centering collar and the wheel bolt or wheel nut is tightened.