| 摘要 |
The invention relates to a screw (1) comprising a cylindrical unit (3) with a threaded outer casing (4), an outer flange (4b) comprising an edge part (12b). The screw (1) is characterised in that the outer flange (4b) comprises a machining surface (12c) with an extension from the edge part (12b) to the outer casing (4a), and in that the outer flange (4b) comprises through holes (31) which extend from the first end face (12a) through the outer flange (4b) to the machining surface (12c). |
