Genuine OEM Volkswagen Hexalobular Flange Screw, part number N91127901. This screw features a hexalobular (Torx) drive and an integrated flange head, which provides a wide bearing surface for secure, stable fastening. It is designed for use in cooling system assemblies to ensure components remain tightly sealed against vibration. Genuine OEM screws are manufactured to exact material specifications to prevent corrosion and ensure consistent clamping force in thermal-cycling environments.