Ensure secure fastening in your assemblies with this Internal Tooth Lockwasher. Crafted from durable steel with a protective zinc coating, it offers reliable performance in a variety of applications. Featuring an outside diameter of .278 inches and a thickness of .017 inches, it is designed to provide a tight grip. With an inside diameter of .133 inches and a hole size of #5, this lockwasher is perfectly suited for your specific needs. Rest assured, it complies with RoHS standards for environmentally friendly manufacturing practices. Trust in the quality and functionality of this essential component for your projects.