... , Blunt Diamond Point, Diamond Point, Screw Shank or Ring Shank ROOFING NAIL STANDARD: DIN GB SPECIFICATION: Diameter: 2.2-6mm Length ... round iron Wire nails, headless iron wire nails, Galvanized Roofing Nails, Galvanized Concrete Nails, wood screws, self-drilling screw, chipboard screws and so on. Umbrella Head Roofing Nails BWG8x3"