Self-tapping screw for anchoring in gas or light concrete component has in front of shaft part with specially configured thread a thread-less spike for driving into component

摘要

The screw has a shaft (3) with thread (5) at least in part. In front of the shaft part (6) with the thread is a thread-less spike (7) for driving into the component. The thread is shaped so that the surface of the supporting thread flank perpendicular to the supporting thread length meets equation A0n equals k(db) to the power of one half with k being a constant of the value: 5 equals or is less than k which is equal or less than 8. The spike tapers towards its pointed end.