The LOCK WASHER INTERNAL ZINC #6 INTERNAL TOOTHED is a hardened circular washer featuring inwardly extending prongs that provide enhanced grip and stability. Crafted from high-quality spring steel, this washer is ideal for applications where a finished appearance is essential, as the teeth remain hidden beneath the screw head. With a zinc coating for added corrosion resistance, this washer is suitable for various automotive and industrial applications, ensuring long-lasting performance and reliability.