| 摘要 |
A self perforating (punching) and thread forming connecting element such as a screw having a screw shaft 2 and screw tip 6 which tapers to a pointed end 4 as well as a single or multiple thread 8 which extends at least partially along the screw shaft 2 and along the screw tip 6 to the pointed end 4. This screw tip 6 has an essentially polygonal cross section along at least a partial region of its axial length and the thread 8 is constructed as a radially raised portion which has a helical shape with an outer thread edge 8a which, when viewed in an axial projection, forms a spiral in the region of the screw tip 6 as the radius of the thread becomes smaller and in the region of the screw shaft 2, the outer thread edge 8a proceeds with a constant radius in the form of a circle. |
