Ensure secure fastening with this Internal Tooth Lockwasher, an essential component for your assembly needs. Made of durable steel with a protective zinc coating, it guarantees reliability and longevity. With an outside diameter of 18mm and a thickness of 0.9mm, it provides a snug fit for M10 hole sizes. Its precise design, featuring an inside diameter of 10.5mm, ensures optimal performance. Compliant with RoHS regulations, this lockwasher is not only efficient but also environmentally friendly. Trust in its quality for your industrial or DIY projects.