The LOCK WASHER INTERNAL ZINC 3/8" INTERNAL TOOTHED is crafted from hardened spring steel, ensuring strength and reliability. Featuring twisted prongs that extend inward, this washer is ideal for applications where a polished appearance is essential, as the teeth remain hidden under the screw head. This component effectively prevents loosening due to vibration, making it suitable for various automotive and industrial uses. Its zinc plating offers added corrosion resistance, enhancing durability in challenging environments.