Essential Lock Washer designed to prevent nuts and bolts from loosening during operation. Key specifications: 18.10 mm (0.71 in) outer diameter, 10 mm (0.39 in) nominal size, ideal for various mechanical applications. Additional specs: 1.80 mm (0.07 in) thickness, providing robust and reliable performance. Made from high quality general steel for durability and strength. Zinc finish enhances corrosion resistance and longevity.