Patent ID: 8807511

Claim:
A system for fastening an add-on part to a vehicle, comprising: a base with a groove, wherein the groove has a first side surface, a second side surface and a base surface, wherein each of the first and second side surfaces is adjacent to the base surface; a connecting element, wherein the connecting element passes through the base; and a connection part having a receptacle, an inner surface, an outer surface, a first adjacent surface and a second adjacent surface, wherein the inner surface is opposite the outer surface, wherein each of the first and second adjacent surfaces is adjacent to the outer surface, wherein the receptacle is adapted to receive the connecting element, wherein the connection part has a cross section of a regular polygon with at least one interior angle deviating from 90°, wherein the first adjacent surface is flush with the first side surface, wherein the second adjacent surface is flush with the second side surface, and wherein each of the first side surface, the second side surface, the first adjacent surface and the second adjacent surface is planar.