Ensure secure fastening with this Internal Tooth Lockwasher, designed for reliable performance in a variety of applications. Crafted from durable steel with a sleek matte finish, this lockwasher features an outside diameter of 7 mm and a thickness of .5 mm, making it ideal for use in metric systems. Its precise specifications, including an inside diameter of 3.7 mm and a hole size of M3.5, guarantee a perfect fit. Compliant with RoHS regulations, this lockwasher is not only efficient but also environmentally friendly. Upgrade your fastening solutions with this essential component.