Enhance the security of your fastening applications with this Internal Tooth Lockwasher. Crafted from durable 400 Series Stainless Steel, it offers reliable protection against loosening and vibration. With an outside diameter of .312 inches and a thickness of .02 inches, this lockwasher is designed to fit #6 hole sizes. Its internal tooth design ensures a tight grip, while its RoHS compliance guarantees environmentally-friendly usage. Perfect for a wide range of industrial and DIY projects, this essential component provides peace of mind in any assembly process.