Enhance fastening security with this External Tooth Lock Washer. Crafted from durable Phosphor Bronze and coated with protective Tin, it ensures long-lasting performance in various applications. Designed to ASME B18.21.1 specifications, this washer features an outside diameter of .501 inches and a thickness of .025 inches, with an inside diameter of .262 inches. The 1/4 hole size accommodates standard bolts, providing a reliable grip and preventing loosening. Compliance with RoHS standards underscores our commitment to environmental responsibility. Trust in this essential component for a robust and efficient fastening solution.