- Size : M10x40 (1 piece) - Product Name : Left Threaded External Hex Head Screws, Reverse Thread Left Tooth Outer Hex Head Bolts - Material : 304 A2-70 Marine Stainless Steel - Standard : GB Key Benefits: - Secure Fastening : Designed with a left-hand thread for applications requiring reverse threading, ensuring a secure hold in situations where standard screws may fail. - Durability : Crafted from premium 304 A2-70 marine stainless steel, these screws are resistant to corrosion and rust, making them ideal for both indoor and outdoor use. - Versatility : Perfect for various applications, including automotive repairs, construction projects, and marine equipment installation, where reverse threading is essential. Specific Use Scenarios: 1. Automotive Applications : Ideal for mounting engine components or transmission parts where left-hand threads are used, preventing loosening due to vibration. 2. Marine Settings : Excellent for securing fittings on boats or docks, offering reliable performance in harsh weather conditions. 3. Construction Projects : Useful in framing or structural applications where opposing thread direction is needed to enhance mechanical stability. Choose these left threaded hex head screws for a robust and reliable fastening solution tailored to your specific needs.