Genuine OEM Volkswagen Retaining Nut, part number 2D3803629. This specialized fastener is designed to provide a secure, hand-tightened fastening solution for various components within the vehicle. It is a black, robust nut, likely made from durable plastic, measuring approximately 0.045 meters in length. Despite its non-traditional appearance, it functions as a quick-release or easily removable securing element. Choosing genuine OEM nuts ensures the correct thread pitch, material strength, and design for reliable and safe attachment, preventing loosening due to vibration or wear.