Patent ID: 9334888
Filing Date: 2016-05-10
CPC Classification: F16B

Claim Text:
1. A fastening device for anchorage in a base material to secure an attachment part to the base material, the fastening device consisting of: a combination of a screw and a sleeve, the screw formed using a screw blank made of steel and having a shaft extending in an axial direction between a first and second end, the screw including a thread extending along part of the shaft from the first end, the screw including a head at the second end and a recess formed at the head for the insertion of a tool, the sleeve mounted on the shaft of the screw and including a rim portion forming a seat disposed adjacent to the head of the screw, the sleeve including an external thread and the rim portion including means for the placement of a second tool, the screw including a support section disposed between the thread of the screw and the mounted sleeve and being enlarged towards a first end of the mounted sleeve located opposite the rim portion by deformation of the screw blank to hold the sleeve on the shaft in the axial direction between the head and the support section in such a manner that the screw and/or the sleeve can be rotated, and the screw including first cutting edges at the support section and the sleeve including second cutting edges at the rim portion; wherein the screw is hardened with the sleeve mounted thereon.