Enhance the security of your fastening system with this External Tooth Lock Washer. Constructed from durable steel with a sleek nickel finish coating, it not only provides reliable performance but also adds a touch of sophistication to your assembly. Designed to meet ASME B18.21.1 specifications, this washer ensures precise and consistent fit. With an outside diameter of .252 inches and a snug inside diameter of .119 inches, it is compatible with #4 hole sizes. Its ultra-thin .015-inch thickness allows for efficient fastening in tight spaces. Rest assured, this washer is RoHS compliant, making it an environmentally responsible choice for your projects. Upgrade your hardware with this essential component for added safety and peace of mind.