Genuine OEM Volkswagen Hexagon Head Bolt, part number N91121301. This standard fastener is designed to provide a secure, reliable connection within various engine and mechanical assemblies. It features a precise hexagonal head for standard tool compatibility and consistent torque application. Genuine OEM fasteners are essential for maintaining the structural integrity of your assembly, as they are manufactured to exact material hardness and thread pitch specifications to prevent loosening or stripping under vibration.