Genuine OEM Volkswagen Socket Head Bolt, part number 01L409135. This high-strength bolt is specifically designed to secure various components within the center differential assembly. Its precise threading and head design ensure proper alignment and maintain the integrity of the assembly during operation. The bolt is typically made from hardened steel for maximum durability. Genuine OEM bolts are manufactured to exact tolerances, ensuring reliable fastening and preventing loosening due to vibration, which is critical for drivetrain safety.