Patent ID: 8052363
Filing Date: 2011-11-08
Classification: F16B

Abstract:
1. Self-tapping screw comprising a head, a boring part and a threaded shaft for attaching a panel to a substructure, wherein the screw is configured such that it produces a through hole in the panel, which accommodates the threaded shaft with a degree of play, and produces in the substructure a bore hole, in which the thread of the shaft cuts a counter-thread, wherein the boring part ( 30 ) has a boring tip ( 50 ) arranged eccentric relative to a longitudinal axis ( 38 ) of the screw ( 20 ) to define an initial drive axis offset by an angle a to the longitudinal axis, and a cutting edge lying in a plane parallel to the longitudinal axis and extending from the boring tip inclined across the screw to an opposite radial side of the shaft from the boring tip so that the boring part is adapted to cut the through hole up to twice the diameter of the boring part, the cutting edge ( 32 ) has first and second axially offset cutting regions ( 34 , 36 ) that are axially spaced apart relative to each other by an axial portion that extends parallel to the longitudinal axis ( 38 ) of the screw ( 20 ) from an end of the first cutting region ( 34 ) inclined away from the tip to an end of the second cutting region that is oriented toward the tip.