Steel Nails & Self-Tapping Screws1. Steel NailsSteel nails are common fasteners made of high-strength carbon steel, used for fixing wooden battens, roof shingles, and auxiliary structures on the roof.Role in Solar Tile Installation　　•Fix preservative wood battens, counter battens, and roof sheathing firmly to the roof structure.　　•Secure lightweight accessories and auxiliary supports for the solar tile system.　　•Provide temporary or permanent fixing during roof construction.Key Performance　　•High hardness and strong penetrating force.　　•Good shear resistance to resist wind load a...