Genuine OEM Volkswagen Double Hexagon Screw, part number N91113301. This specialized fastener is designed to secure components within the fuel system, ensuring a tight and reliable seal. It is used in the fuel rail and injector assembly to maintain structural integrity under pressure. This screw is manufactured to exact factory specifications for material composition and thread precision. Choosing genuine OEM fasteners ensures the correct torque retention and resistance to heat and vibration required for fuel system safety.