... , shank diameter-3.8mm, length-50mm 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 ... ,small box,carton then pallet or as customers' requirement. Galvanized Concrete Nail