We are capable to make unstandard screws according to drawings or samples. General tolerance:+/-0.2mm. Applying Field: Home appliance, Machine,Metal parts,Assembled accessories,Washing machines,Dish washers,Refrigerators,Oven etc.Plating:Cr6+,Cr3+,Zinc plating,Phosphate plating,Copper plating,Sliver plating,Dacro,Ruspert,Mechanical plating etc.