Standard:ISO product name:drilling screw , self drilling screw , roofing screws Standard:DIN , ANSI/ASME, BS, GB, JS, Non-standard. materials:Carbon steel,stainless steel export:the world countries , main to American and Canada Service:ODM, OEM offerted surface treatment:Galvanized (Various of color), dacromet, black, phosphating,plain Delivery time:7-15days after the deposit packing:white box , colored box Surface Finishing:Brass/zinc/nickel/black plated Head type:Pan/Csk/Truss/Bind/Cheese Head Show More