Hexagonal lock nut designed for securing bolts and reducing loosening under vibration. Key specs: 18 mm (0.71 in) width across flats, 1.75 mm (0.07 in) thread pitch, and 12 mm (0.47 in) thread size for versatile applications. Additional specs: D-type locking, 8.30 mm (0.33 in) wrench height, and 12 mm (0.47 in) thickness for reliable performance. Made from high quality general steel for durability and strength. Finished with zinc flake coating for enhanced corrosion resistance.