About This Specification - Product Type: M10 Spring Lock Washer; Color: Black; Package Quantity: 20 PCS. Material - Made of 304 Stainless Steel which has excellent high temperature resistance, thermal conductivity and low resistivity. Performance - Great corrosion resistance in bad environment such as high temperature, cold weather, and high humidity areas; Superior rust resistance, excellent oxidation resistance and long service life. Function - The spring washers are compatible with nuts and bolts of the same size, which are used to evenly distribute the load fastened by screws to prevent the bolts and the connecting objects from loosening. Widely Application - Apply for electronics, machinery, automotive, marine uses, industrial, furniture, etc. Overview Material : Stainless Steel Outside Diameter : 10 Millimeters Washer Type : Split Lock Exterior Finish : Black Oxide Fastener Size : M10