Genuine OEM Audi Rear Collar Nut, part number WHT000812. This specialized nut features an integrated collar, which helps distribute the clamping force over a wider area, providing a more secure and stable fastening for various components. It is typically used in the rear of the vehicle. Made from durable metal and weighing only 0.0011 kg, it ensures reliable attachment. Using genuine OEM fasteners guarantees the correct thread pitch, material strength, and precise dimensions for optimal torque and long-term component security.