... Socket,Pozi/Cross3. Metric and inch aluminum screw screw,or your requires4. Material of aluminum screw :Carbon steel, Alloy steel, stainless steel ... M2-M16mm, Inch size from #4-#107. Surface of aluminum screw :Plain, black finished, Zinc plated (Galv), Nickel, phosphate black ... on your quantity .............We custom kinds of aluminum screw based on your requirs or print drawing....... Aluminum Screws