Enhance the security of your fastening applications with our External Tooth Lock Washer. Crafted from durable 400 Series Stainless Steel, this washer ensures reliable performance in demanding environments. With an ASME B18.21.1 specification type, it meets rigorous industry standards. Featuring a precise outside diameter of .501 inches and a thickness of .025 inches, it provides a perfect fit for your 1/4-inch hole size. The internal diameter of .262 inches offers compatibility with various fasteners. Rest assured, this washer is RoHS compliant, making it an environmentally responsible choice. Upgrade your assembly process with this essential locking component.