Enhance the security of your fasteners with this Internal Tooth Lockwasher. Crafted from durable Phosphor Bronze material, it ensures reliable performance in various applications. With a thickness of .021 inches and an outside diameter of .402 inches, it offers a snug fit for #10 hole sizes. The precision-engineered design features an inside diameter of .199 inches, guaranteeing optimal functionality. Compliant with RoHS standards, this lockwasher is a responsible choice for your assembly needs. Upgrade your hardware with this essential component for enhanced safety and stability.