Genuine OEM Volkswagen socket head bolt, part number N91087001. This fastener is designed with a high-strength cylindrical head and internal drive to secure critical components within the transmission housing. It is used to maintain structural integrity under the vibration and thermal loads typical of a transmission assembly. Genuine OEM bolts are engineered with the exact tensile strength and corrosion-resistant coating required to prevent fastener failure and ensure consistent clamping force.