Gevinddannende element, navnlig til huller frembragt i materialer, der er deformerbare i kold tilstand

摘要

The present invention relates to a thread-forming element, particularly for holes made in cold-deformable materials, comprising a cylindrical body (2) with a circular cross-section which has on at least part of its outer surface a helical thread (4). The helical thread (4) extends in proximity to at least one conical end (5) of the cylindrical body (2). The distinctive characteristic of the thread-forming element (1) consists in the fact that on the surface of the end (5) there is at least one tapping element (6), which has a hexahedral shape with a triangular base.