... screw for electrical appliances 1.material: steel 2.specification:M1.4-M20-8-1 3.finish: nickel plated precision screw for electrical ... , etc.Material: 1010 carbon steel, 1018 carbon steel, 1022 carbon steel, 302 stainless steel, 304 stainless steel, 306 stainless steel, etc.Electroless nickel products, ... the standard of European Union ROHS. precision special steel screw for electrical appliances