Genuine OEM Volkswagen Hexagon Socket Head Bolt, part number N91183501. This fastener is engineered for the secure mounting of lighting components, specifically within the headlight assembly. It is located at position 10 in the provided diagram. The bolt features a precise hexagonal socket drive for reliable installation and removal. Genuine OEM hardware is critical for these assemblies to ensure the correct alignment and vibration-proof mounting of delicate headlight housings.