Genuine OEM Volkswagen Hex Collared Bolt, part number N90245205. This bolt features a hexagonal head and an integrated collar, providing a wider bearing surface for secure fastening. It is located in the engine cooling system assembly. The bolt has a length of 0.017m, a width of 0.014m, and a height of 0.014m. Genuine OEM bolts ensure precise thread engagement and material integrity for critical engine cooling connections.