120 Qty 5/16-18 x 2 1/2" Flat Head Floorboard Self-Tapping Thread Cutting Screws & Trailer Deck Screws, T40 Star Drive, Type F, Black Phosphate Finish

120 Qty 5/16-18 x 2 1/2" Flat Head Floorboard Self-Tapping Thread Cutting Screws & Trailer Deck Screws, T40 Star Drive, Type F, Black Phosphate Finish

Heavy-Duty Trailer Floor Application: Engineered for trailers, utility trucks & heavy equipment flooring. Securely fasten wood, metal, or composite materials with vibration-resistant hold, even under extreme loads and repeated impacts. Thread Cutting Design: Sharp Type F tip and precision-cut threads bite into tough materials instantly, reducing installation time by 50% – perfect for both professionals and DIYers. Included T40 Star Drive System: Comes with 1 industrial-grade T40 star drive bit. Anti-camout grooves maximize torque transfer, eliminating stripped screws and frustration during high-pressure installations. Military-Grade Corrosion Protection: Black phosphate offering 3X more rust resistance than basic zinc plating. Withstands rain, snow, road salt, and harsh chemicals for years of service. Flush-Mount Safety Design: 80° flat countersunk head sits perfectly flush with surfaces. Eliminates snag hazards on cargo floors while maintaining structural integrity under heavy traffic. Upgrade your heavy-duty projects with these 120 Pcs 5/16-18x2 1/2" Black Phosphate Trailer Floorboard Screws, engineered for unmatched durability and efficiency. Featuring self-tapping thread-cutting technology, these screws pierce wood, metal, or composite materials effortlessly, eliminating pre-drilling and cutting installation time by 50%. The included industrial-grade T40 star drive bit ensures maximum torque transfer, preventing slippage even under high pressure. Built with heat-treated carbon steel and a military-grade black phosphate coating, they resist corrosion 3X longer than standard zinc-plated screws, thriving in harsh weather, road salt, and chemical exposure. The 80° flat head design sits flush with surfaces, preventing cargo snags while maintaining structural integrity. Ideal for trailer decks, truck floors, agricultural equipment, and warehouse walkways.These wood to metal Screws delivers professional-grade reliability for both DIYers and commercial users.