Genuine OEM BMW Self Locking Hex Bolt, part number 11137551825. This hex bolt is designed with a self-locking feature, such as a thread-locking compound or a deformed thread, to prevent loosening due to vibration. It is used to securely fasten various components within the vehicle. Manufactured from high-strength steel with a protective coating. Genuine OEM bolts ensure the correct thread pitch, strength rating, and locking mechanism for safe and reliable assembly.