Cross recessed pan head self drilling screws material:Stainless Steel 316,Stainless Steel 304 etc ... ANSI 3.Certificate: ISO 9001:2000 Cross recessed pan head self drilling screws 1.Machining method: cnc Turning, Milling, Drilling, threading ... , blackening, Nickel plating, Electrophoresis, Anodization3.size:Various kinds of screws are available4.Color: Metal colors available5.Packing: cartons, pallet, ...