The LOCK WASHER INTERNAL ZINC 1/4" INTERNAL TOOTHED (SKU: ILW14) is a hardened circular washer featuring inward-extending prongs that provide superior locking capability. Made from high-quality spring steel and finished with a zinc coating, this washer is ideal for use in applications where the aesthetic is essential, as the teeth remain concealed beneath the screw head. Its robust design ensures secure fastening, making it suitable for automotive and industrial applications where reliability is paramount.