steel concrete nail 45#steel nails head diameter-8mm, shank diameter-4mm, length-63mm strength-HRC52 Galvanized Steel Concrete Nail Use for construction Nails series specification options,Material:Iron, carbon steel, stainless steel, Q195,Q235.Head type: flat, round flat, oval, headless...Shank type: smooth, spiral, Annular, grooved...Surface treatment:Plain, galvanized, black, HDG, ,YZP...Head ...