Genuine OEM Volkswagen Nut, part number WHT010500. This nut serves as a fastener to join or secure components within the engine cooling system, specifically shown securing a hose assembly. It is essential for maintaining the integrity of coolant lines and ensuring there are no leaks. The nut is made from materials resistant to heat and coolant exposure. Genuine OEM nuts provide the exact specifications required for a secure fit and long service life in the cooling system.