Enhance the security and stability of your fastening applications with this External Tooth Lock Washer. Crafted from durable bronze with a protective nickel coating, it offers reliable performance in various industrial settings. Designed to ASME B18.21.1 specifications, it features an outside diameter of .402 inches and a thickness of .021 inches, ensuring a snug fit for #10 hole sizes. The toothed design provides a firm grip, preventing loosening and vibration, while its RoHS compliance underscores its commitment to environmental responsibility. Upgrade your assembly process with this essential component for optimal fastener retention.