Wafer Head self drilling screw 1. Standard: DIN, ANSI, GB 2. Size: ... .9 to ST6.3 3. Material: Carbon Steel,st Wafer Head self drilling screw1. Standard: DIN, ANSI, GB 2. Size: ST2 ... ,Stainless steel3.surface:Plain,Zinc,Black,H.D.G.4.head: Hex, Pan or CSK5.packing:general export packing poly bag ... cartons,then pallets6.delivery time:30days after order confirmation Wafer Head self drilling screw