| 摘要 |
The invention relates to a thread-forming composite anchor screw (10) for screwing directly into a bore (12) that is inserted into a solid anchoring substrate (13) and provided with a curable compound, wherein the screw (10) comprises a screw head (14) having a tool application means, a substantially cylindrical shank (16) and preferably a truncated cone-like or truncated pyramid-like tapered point (18). According to the invention, the screw (10) has two or more, preferably three, thread bands (20, 22, 24), each comprising two or more, preferably two, threads (26a, 26b, 28a, 28b, 30a, 30b) that are formed parallel to one another and extend helically at least partly over the length of the shank (16). |
