Ensure optimal fastening with this External Tooth Lock Washer. Crafted from durable Steel and coated with Zinc for enhanced longevity, this washer guarantees reliable performance. Measuring .252 inches in outside diameter and .015 inches in thickness, it is designed to fit securely in place. With an inside diameter of .119 inches and a hole size of #4, it is suitable for a variety of applications. Compliant with ASME B18.21.1 standards, this washer is a essential component for any fastening project.