Enhance the security of your fastening applications with our External Tooth Lock Washer. Crafted from durable stainless steel and coated in sleek black oxide, it ensures reliable performance and corrosion resistance. With an ASME B18.21.1 specification, this washer features precise measurements: an outside diameter of .402 inches, thickness of .021 inches, and an inside diameter of .199 inches. Designed for #10 hole size compatibility, it guarantees a perfect fit for your assembly needs. Compliant with RoHS regulations, it's also environmentally friendly. Elevate the strength and stability of your projects with this essential locking component.