Ensure secure fastening with this External Tooth Lock Washer. Crafted from durable bronze, it provides reliable locking power for #8 hole sizes. With an outside diameter of .373 inches and a thickness of .021 inches, it is designed to fit snugly in place. The ASME B18.21.1 specification guarantees high quality, making it a must-have for any industrial or mechanical application. Its precise .172-inch inside diameter ensures a perfect match with corresponding screws or bolts. Trust in its robust construction for effective vibration resistance and peace of mind in any assembly.