Enhance the security of your fastening applications with this External Tooth Lock Washer. Crafted from durable steel with a protective zinc coating, it provides reliable performance in various environments. Compliant with ASME B18.21.1 specifications, this washer features an outside diameter of .75 inches and a thickness of .036 inches, ensuring a snug fit. The external tooth design offers increased grip, preventing loosening and maintaining the integrity of your assemblies. With an inside diameter of .455 inches and a hole size of 7/16, it is compatible with a range of bolts and screws. Rest assured, this washer is RoHS compliant, making it an environmentally conscious choice for your projects. Trust in its quality to bolster the stability of your constructions.