Ensure secure fastening with this External Tooth Lock Washer. Crafted from durable steel with a zinc finish coating, it offers reliable protection against corrosion and wear. Designed to meet ASME B18.21.1 specifications, this washer features an outside diameter of .373 inches and a thickness of .021 inches. Its #8 hole size and .172-inch inside diameter make it suitable for various applications. This washer is essential for maintaining the integrity of your assemblies. Please note, it is not RoHS compliant.