Secure your fasteners with ease using this Internal Tooth Lockwasher. Made from durable stainless steel, this lockwasher ensures a reliable grip, with an outside diameter of 18 mm and a thickness of .9 mm. Designed for Metric systems, it features an inside diameter of 10.5 mm and a hole size of M10, making it suitable for a variety of applications. Rest assured of its quality and environmental compliance with its RoHS certification. Keep your assemblies tight and secure with this essential hardware component.