Genuine OEM Hyundai Crankshaft Bolt, part number 231272A001. This heavy-duty fastener is engineered to secure essential components, such as the crankshaft pulley or harmonic balancer, to the engine's crankshaft. Its robust design is crucial for withstanding the high rotational forces and vibrations within the engine. The bolt features a flanged head and weighs approximately 0.24 kg, with dimensions of 10 cm in length and 4.5 cm in width/height. Using a genuine OEM crankshaft bolt ensures the correct material strength, thread pitch, and torque specifications, which are vital for maintaining engine integrity and preventing catastrophic failures.