Genuine OEM Volkswagen Hexagon Head Bolt, part number N90738202. This bolt features a combination hexagon head and is used in engine applications, specifically for pistons. It has a length of 0.154m, width of 0.04m, and height of 0.04m, weighing 0.1515 kg. Genuine OEM bolts for piston applications are manufactured to exact specifications for strength and durability, ensuring the critical integrity of the engine's rotating assembly and preventing catastrophic failure.