Product Name : pan head machine screw (pan head,flat head,oval head,hex head) Standard: ... JIS Product size:M3-M48 1/4" Product Namepan head machine screwBrand Namesun-alpsStandard ModelDIN ANSI JIS ASTMFINISHBlack,Zinc Plated ,HOT ... GALVANIZED,Cr Cu or Ni PlatedMaterialCarbon Steel,Brass, Stainless steel,Spring steelMaterial Class4.8 6.0 8.8 12.9gradeProduct sizeM3 ...