S-97760A625 M10 x 25 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 with Class 8.8 rating (110,000 psi) for reliable performance in demanding applications.
• Left-hand thread design provides secure fastening in situations where standard right-hand threads may loosen due to rotational forces.
• Durable steel construction with Rockwell C21 hardness ensures long-term wear resistance and structural integrity.
• External hex drive head (17mm width) allows for easy installation and removal with standard tools, improving assembly efficiency.
• Fully threaded M10x1.5mm coarse pitch offers quick engagement and superior holding power in various materials.
• Precise Class 6g thread fit guarantees consistent performance and compatibility with standard metric nuts and components.
• Compliance with major international standards including ASME B18.2.3.1M and ISO 898-1 ensures quality and interchangeability.

Professional Applications & Engineering Value

This M10 left-hand hex screw is engineered to solve critical fastening challenges in industrial environments where reverse rotation is a concern. The Class 8.8 steel construction provides the necessary high tensile strength to withstand vibration and heavy loads, preventing unexpected failures in machinery, automotive assemblies, and rotating equipment. The coarse metric thread (1.5mm pitch) ensures rapid installation and reduces cross-threading risks, while the fully threaded design offers maximum grip length for enhanced stability. Its left-hand thread direction is particularly valuable in applications with counter-clockwise rotating components, maintaining tightness where standard screws would loosen. The external hex drive facilitates quick maintenance and disassembly, making it ideal for production lines and field service where downtime must be minimized.

Specification Summary & Compliance

This hex head screw features precise M10x1.5mm coarse threads with Class 6g thread fit tolerance, ensuring dimensional accuracy per metric standards. It meets ASME B18.2.3.1M and ISO 898-1 manufacturing specifications for mechanical properties and dimensions. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from restricted hazardous substances and safe for industrial use across global markets.