Screw for attaching non-perforated steel sheet profiles on wooden sub-structures, has screw thread, which begins on screw shaft and extends to front end of screw tip, and is formed as double thread on screw tip

摘要

The screw has a screw head (2) and a cylindrical screw shaft (1), which extends in the screw head facing away an end region into a screw tip (4) and is formed in a two-piece. A head area attaching to the screw head together with the screw head is made of stainless steel and the area having the screw tip is made of carbon steel. A screw thread (6) is provided, which begins on the screw shaft and extends to the front end (5) of the screw tip. The screw thread is formed as a double thread (6) on the screw tip.