This product is a self-locking nut designed specifically for use in Volkswagen and Audi vehicles. It is a genuine OEM part with the part number N90085001. The nut is used to secure various components in the vehicle and has a unique design that prevents it from loosening or coming off. It is made with high-quality materials to ensure durability and reliability. This self-locking nut is an essential component for maintaining the safety and functionality of your VW or Audi vehicle.