Patent ID: 8740502

Claim:
An anchor nut, comprising: a screw thread hole having a first region with a screw thread of a first diameter and a second region, the screw thread hole being uncovered at a rear end of the second region prior to installation of the anchor nut on an externally threaded body, the second region being one of: i) free of any screw thread, and ii) having a screw thread of a second diameter, the second diameter being reduced in size in comparison to the screw thread of the first diameter, wherein the second region is provided in a region of a ring that projects from a face of the anchor nut, the ring being provided on the face of the anchor nut opposite to an approximately hemispherical part of the anchor nut; wherein the first and second regions of the anchor nut are constructed and arranged so that under a condition of an entirety of the first region being threaded onto the externally threaded body having a thread corresponding to the thread of the first region, continued rotation of the anchor nut results in the second region being pulled over the externally threaded body so that the externally threaded body penetrates the second region, causing the projecting ring to deform by radially widening at least an outer circumferential surface of the projecting ring from the face of the anchor nut, the first and second regions remaining attached to one another, and wherein the screw thread hole remains uncovered at the rear end of the second region provided in the ring opposite the face of the anchor nut during the threading.