The LOCK WASHER SPLIT METRIC ZINC M4 is engineered from high-quality zinc-plated steel for enhanced corrosion resistance and durability. With a diameter of 4mm, this split lock washer is ideal for securing bolts and screws in various automotive and industrial applications. Its unique design provides superior locking force, ensuring that fasteners remain tight under vibration and stress. Perfect for use in machinery, equipment assembly, and maintenance tasks, this washer meets stringent industry standards for reliability.