Screw for drilling and tapping in a first supporting surface section and a harder second supporting surface section

摘要

screw (100) on which a substrate (202) with a first untergrundabschnitt (204) and a second at least partially behind it was harder untergrundabschnitt (206) and the screw (100), a vorderseitige drill point (102) for at least partial cut of the e rsten untergrundabschnitts (204) and the second untergrundabschnitts (206).a back schraubenkopf (104) with a drive (130) to drehantreiben the screw (100), and a schaftabschnitt (106) between the drill point (102) and the schraubenkopf (104) with a in the schraubenkopf (104), directly or indirectly, thenin the first untergrundabschnitt (204) and the second untergrundabschnitt (204) selbstschneidenden gewindeabschnitt (108) and a drill point (102) directly to the subsequent gewindefreien remarkable rejuvenation, staff verju00fcngungsabschnitt (110), directly to the thread section (108) with.