Screw forming a thread without cutting chips

摘要

The screw (10) has a pointed conical section (21) extending from a cone point (13) starting from a direction of a head (14). A cylindrical section (25) is arranged between the pointed conical section and the head. The pointed cone section includes a pointed angle between 20 degrees and 30 degrees based on a groove of a thread, where the pointed cone section is connected at the cone point. An initial point of another thread (15) has a distance of 0 to 0.3 millimeter from the cone point, where the initial point is turned away from the head.