| 摘要 |
A screw element (1), having a threaded shank (2) and a screw tip (4), on one shank end, and a screw head (5) on the opposite end with force-application means (7), and a screw thread (12) on the threaded shank (2) and the screw tip (4). The screw tip (4), has a front first tip portion (4a), which tapers towards the end of the screw element, and a second adjacent tip portion (4b), having, a polygonal cross section, with an enveloping circle diameter (dh) larger than a core diameter (dk) of the first tip portion (4a). On the transition between the first and the second tip portions 4a,4b) at least one end edge face is radially oriented in the diameter enlargement and terminates in a vertex (15) of the polygonal cross section, which lies on the enveloping circle of the second tip portion (4b). |
