Countersunk Tight-Grip External-Tooth Lock Washers are critical components in preventing fastener loosening due to vibration, thermal expansion, or dynamic loads. Our selection includes split, tooth, and wedge-lock designs manufactured from high-strength materials like spring steel and stainless steel. These washers provide a reliable mechanical lock by creating tension or biting into the mating surface, ensuring long-term structural integrity in automotive, aerospace, and heavy machinery applications. Engineered to meet rigorous industrial standards, they offer exceptional performance in high-vibration environments.