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Hexagonal Lock Nut designed for secure fastening in various applications. Features a 13 mm (1/2 in) width across flats, 1.25 mm (0.05 in) thread pitch, and D-type locking for enhanced stability. Includes a 5.15 mm (0.2 in) wrench height and 8 mm (5/16 in) thickness for robust performance. Made from high quality general steel. Finished with a zinc coating for improved corrosion resistance.