Genuine OEM Ford Crankshaft Pulley Screw, part number 1149131. This screw is specifically designed to secure the crankshaft pulley to the crankshaft. It plays a critical role in maintaining the correct timing of the engine's rotating assembly. The screw has a hexagonal head and a flanged base for secure mounting. Genuine Ford parts are manufactured to precise specifications, ensuring proper fitment and durability for critical engine components.