a countersunk head screw is provided . the countersunk head screw includes a head attached to or integrally formed with the shank . a thread extends over a partial region of the shank and a portion of the head includes a bearing surface that tapers conically towards the shank . at least one cutting rib is arranged in a lower region of the bearing surface facing or adjacent the shank . additionally , at least one restraint rib is arranged in a top region of the bearing surface turned away or spaced apart from the shank .