Screw for connecting e.g. aluminum castings of motor vehicle, has screw head comprising set of contact elements that run radial to shaft, where flanks of contact elements run opposite to axial direction in inclined manner

摘要

The screw (10) has a screw head (14) comprising a set of contact elements (18) for an automatic screwing tool. The contact elements run radial to a shaft (12), where flanks (26) of the contact elements run opposite to axial direction in an inclined manner. The flanks exhibit a smaller cross section surface on a side turning towards a passage point of a shaft axle (20), than on another side that is turned away from the passage point. The contact elements run from outer circumference of the screw head towards the passage point.