self drilling screw 1)Material:carbon steel,stainless steel 2)Grade:A2-A4 D:M5-M20 3)Size:various 4)Head style:various self drilling screwStandard:DIN, ANSI, GB, JISMaterial: stainless steel, carbon steel, steelSize: variousStrength: 4.6,4.8,5.6,5.8,6.8,8.8,10.9,12.9Finish: zinc plated in yellow, blue, white.or according to customers requirements.Packing: export packing (carton bulk packing, ...