Patent ID: 8864837

Claim:
A screw-in element comprising a pole, an equator, and seen in a cross-section passing through a screw-in axis a nonlinear lateral surface in at least one partial area and a thread groove and a thread lying at least in this partial area, said thread having a changing thread profile formed by thread teeth running along a line surrounding the screw-in element in a direction from the pole of the screw-in element to the equator of the screw-in element, a first flank of each thread tooth lying in a screw-in direction having a constant angle, wherein a second flank of each thread tooth faces the equator and is subject to an angle change in the at least one partial area, wherein the angle change of the second flank of each thread tooth occurs continuously, wherein in a cross-section passing through the screw-in axis the first flank of each thread tooth lying in the screw-in direction is perpendicular to the screw-in axis of the screw-in element, and wherein a cutting edge is implemented on the second flank of each thread tooth.