This External Tooth Lock Washer provides essential hardware for secure fastening applications. Made from durable 410 Stainless Steel, it offers reliable strength and corrosion resistance. With an ASME B18.21.1 specification, it meets industry standards for quality and performance. The washer features an outside diameter of .402 inches and a thickness of .021 inches, ensuring a precise fit. Its external tooth design enhances grip and prevents loosening, making it ideal for use in high-vibration environments. The inside diameter of .199 inches and hole size of #10 accommodate various bolts and screws. This washer is RoHS compliant, guaranteeing its environmental responsibility. Trust in this External Tooth Lock Washer for dependable fastening solutions.