S-97760A923 M8 x 35 mm ASME B18.2.3.1M, ISO 898-1 Left-Hand Threaded Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from zinc plating protects against rust and environmental degradation, extending service life in harsh industrial settings.
• Left-hand threading provides secure fastening in applications where standard right-hand threads may loosen due to rotational forces, enhancing operational safety.
• Class 8.8 strength grade and Rockwell C21 hardness deliver consistent durability and resistance to wear, minimizing maintenance needs and downtime.
• External hex drive design allows for high torque application with standard tools, ensuring efficient installation and removal while preventing stripping.
• Fully threaded shank offers maximum grip and adjustment flexibility along the entire length, accommodating various material thicknesses securely.
• Precision metric coarse threading (M8 x 1.25mm) with Class 6h fit ensures smooth engagement and reliable performance in high-vibration environments.

Professional Applications & Engineering Value

This M8 left hand hex screw is engineered to address critical challenges in industrial machinery, automotive assemblies, and equipment subject to counter-clockwise rotational forces. The Class 8.8 steel construction provides the necessary mechanical strength to withstand dynamic loads and vibration, while the zinc-plated finish offers essential corrosion protection in humid or chemically aggressive environments. The left-hand metric coarse thread design prevents unintended loosening in applications like rotating shafts, conveyor systems, and press fittings where reverse-thread security is paramount. With its external hex drive and fully threaded configuration, it ensures maximum torque transmission and installation efficiency, reducing assembly time and improving maintenance accessibility in confined spaces.

Specification Summary & Compliance

This fastener features precision M8 x 1.25mm coarse threads with Class 6h thread fit tolerance for consistent engagement. It complies with ASME B18.2.3.1M and ISO 898-1 specifications, ensuring dimensional accuracy and mechanical performance. The product meets industry standards for Class 8.8 strength grade and is manufactured with RoHS and REACH compliance for environmental safety.