Ensure maximum security with our Internal Tooth Lockwasher. Crafted from durable stainless steel, this essential component boasts a .031-inch thickness and a .6-inch outside diameter, making it ideal for a wide range of applications. With an inside diameter of .326 inches and a hole size of 5/16, it offers a perfect fit for various fastening tasks. Rest assured, this lockwasher is fully compliant with RoHS regulations, guaranteeing both performance and environmental responsibility. Upgrade your hardware arsenal with this essential tool for secure and reliable fastening.