Genuine OEM Volkswagen Hexagon Flange Screw, part number WHT011493. This screw is used for fastening the rear bumper cover. It is identified as item 23 in the differential and axle diagram. The hexagon flange head provides a wider surface area for secure attachment and helps distribute clamping force evenly. Genuine OEM screws are manufactured to precise specifications for optimal thread grip and material strength, ensuring the rear bumper cover remains securely attached.