Item Descriptions:-M6x40mm Double End Threaded Stud Screw Bolts are made of 304 stainless steel, hardness, rust-resistance, and anti-corrosion. Not easy to slick, deep thread, no deformation, smooth thread, high precision, high hardness and low abrasion.-It has little wear and tears in connection with screws, is reusable, smooth surface, Easy to Use.-The screw thread is stable characteristics, high reliability?clean and accurate, even force, and it is durable.-Widely used in electric power, chemical industry, oil refining, valves, railways, bridges, steel structures, automobile and motorcycle accessories, machinery and large buildings, et.Package:40x Double End BoltItem Specifications:Color:SilverScrew Standard:M6x 40mm