S-97760A435 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

• Superior tensile strength with Class 8.8 rating (110,000 psi) ensures reliable performance in high-stress applications
• Left-hand thread design provides secure fastening in applications where right-hand threads would naturally loosen
• Fully threaded construction offers maximum grip length and uniform load distribution along the entire fastener
• Coarse thread pitch (1.25mm) enables quicker installation and better resistance to vibration-induced loosening
• External hex drive with 13mm head allows for high-torque installation using standard tools
• Class 6g thread fit ensures precise mating with nuts and threaded components for consistent assembly quality
• Multiple compliance certifications including ASME, ISO, RoHS 3, and REACH guarantee regulatory acceptance

Professional Applications & Engineering Value

This M8 left-hand hex head screw addresses critical engineering challenges in industrial settings where reverse-thread applications are essential. The Class 8.8 steel construction provides exceptional durability against shear forces and fatigue, making it ideal for machinery, equipment, and assembly lines where standard right-hand threads would back out under constant rotational forces. The coarse metric thread design ensures reliable performance in applications involving vibration, thermal cycling, or dynamic loads. With its external hex drive and precise Class 6g thread fit, this fastener delivers consistent clamping force and simplifies maintenance in demanding industrial environments where reliability and quick service access are paramount.

Specification Summary & Compliance

This metric hex head screw features M8 x 1.25mm coarse threading with Class 6g thread tolerance for precise fitment. Manufactured to ASME B18.2.3.1M and ISO 898-1 standards, it delivers consistent dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications while meeting international quality and safety requirements.