Abstract: The invention relates to a screw anchoring device adapted to be inserted in a bored hole and of the type having a tubular anchoring member moulded from plastics material and provided with longitudinally -- for example axially or helically -- extending slits or slots. The anchoring member cooperates with a screw in such a manner that the anchoring member may be axially compressed and thereby radially expanded by tightening of the screw. A sleeve or tubular member inserted in one end of the anchoring member cooperates with an internal shoulder abutment within the anchoring member, whereby the anchoring device is made universally applicable so that it may be mounted as well in through holes in panels or plates as in nonthrough holes in solid walls whether these walls are made from more or less pressure resistant materials and whether the diameters of the bored holes correspond more or less to the outer diameter of the anchoring device.