Ensure secure fastening with this External Tooth Lock Washer. Made of durable steel with a protective yellow zinc coating, it offers reliable performance. Measuring .682 inches in outside diameter and .036 inches in thickness, it is ideal for various industrial applications. Designed to fit a 3/8-inch hole, with an inside diameter of .391 inches, it provides a perfect grip. This washer, compliant with ASME B18.21.1 standards and RoHS regulations, guarantees both quality and environmental responsibility. Trust it for your assembly needs.