Screw for screwing into a drilled hole and a pre-header - arrangement with such a screw screwed into the drilled hole

摘要

A screw for screwing into a drilled hole (4) into a porous material (6) comprises a core (12) with an insertion end (13) and a means - along - axis (15), a one piece with the core (12), extends along a at the insertion end (13) arranged a cutting thread - section (a_Sg) extending cutting threads (16) for cutting the latter, in the material (6), in one piece with the core (12) constructed pre-header - section (a_Vg) for biasing of the screw (2) in the material (6) and a along the means - along - axis (15) between the cutting thread - section (a_Sg) and the header - section (a_Vg) arranged force decoupling - section (a_Ke) with a smooth surface (17).