hot sell self drilling screw Head styles:hex ,lange,pan,flat,oval ... :DIN ANSI JIS Surface: ZP,phospha Material:c1022 Product Namehot sell self drilling screwBrand Namesun-alpsStandard ModelDIN ANSI JIS ASTMFINISHBlack,Zinc ... Ni PlatedMaterialCarbon Steel,Brass, Stainless steel,Spring steelMaterial Class4.8 6.0 8.8 12.9gradeProduct sizeM3-M48 1/4"-3 ...