The External Tooth Lock Washer, a reliable component designed for secure fastening applications. Made from durable stainless steel, this washer features an ASME B18.21.1 specification, ensuring high quality and performance. With an outside diameter of .402 inches and a thickness of .021 inches, it provides a precise fit for #10 hole sizes. The external tooth design enhances grip and prevents loosening, offering added security in various industrial and mechanical settings. Its RoHS compliance underscores its commitment to environmental responsibility. Trust in this essential washer for your fastening needs, guaranteeing optimal strength and stability.