Genuine OEM Hyundai Cylinder Head Bolt Washer, part number 223222B700. This essential component is used with cylinder head bolts to distribute the clamping load evenly across the cylinder head surface, preventing damage and ensuring consistent torque. It helps maintain the integrity of the cylinder head gasket seal, which is crucial for engine compression and coolant/oil containment. Using a genuine OEM washer ensures the correct material strength, dimensions, and surface finish for reliable fastening in high-stress engine applications.