S-97760A924 M8 x 40 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 corrosion resistance with zinc-plated finish for extended service life in harsh environments
• Exceptional mechanical strength with Class 8.8 rating and 110,000 psi tensile strength for heavy-duty applications
• Reliable left-hand threading provides secure fastening in specialized machinery and reverse-rotation systems
• Full threading design ensures maximum grip length and uniform load distribution across the entire fastener
• Precision metric coarse thread (M8 x 1.25mm) enables quick installation and superior vibration resistance
• External hex drive compatibility allows for standard tooling and efficient installation/torque application
• Certified material hardness (Rockwell C21) maintains structural integrity under repeated stress and load conditions

Professional Applications & Engineering Value

This left-hand thread hex head screw delivers critical engineering solutions where conventional right-hand threads would loosen under counter-clockwise rotation. The Class 8.8 steel construction combined with zinc plating provides durable corrosion protection for industrial equipment, machinery assemblies, and automotive components exposed to moisture and chemicals. The metric coarse threading (M8 x 1.25mm) ensures rapid installation in production environments while maintaining superior resistance to vibration-induced loosening. With full threading along the 40mm length, engineers achieve maximum clamping force distribution in high-stress applications including rotating machinery, conveyor systems, and specialized manufacturing equipment requiring reverse-thread security.

Specification Summary & Compliance

This fastener features precision Class 6h thread fit tolerance for consistent mating with standard nuts and threaded components. Manufactured to meet ASME B18.2.3.1M dimensional specifications and ISO 898-1 mechanical property requirements, ensuring international compatibility and performance reliability. The zinc-plated steel composition complies with RoHS and REACH environmental standards while providing corrosion protection. All dimensional and mechanical properties are certified to industrial standards for quality assurance in professional applications.