S-97760A425 M8 x 25 mm ASME B18.2.3.1M, ISO 898-1 Left-Hand Threaded Medium-Strength Metric Class 8.8 Steel Hex Head Screws
Left-Hand Threaded Medium-Strength Metric Class 8.8 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 110,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Class 8.8 strength grade provides a robust balance of durability and toughness, suitable for demanding industrial environments.
- Left-hand threading offers secure fastening in applications where standard right-hand threads may loosen due to rotational forces.
- Fully threaded design allows for maximum grip and load distribution along the entire length, enhancing joint stability.
- Coarse 1.25mm pitch enables quick assembly and disassembly, saving time in maintenance and installation processes.
- External hex drive with 13mm head facilitates easy tightening using standard tools, improving efficiency in assembly lines.
- Rockwell C21 hardness ensures resistance to wear and deformation, extending the screw's service life in harsh conditions.
Professional Applications & Engineering Value
This M8 left hand hex head screw is engineered to address critical challenges in industrial settings where reverse-thread fastening is essential. Made from high-quality steel with a Class 8.8 strength rating, it prevents unintentional loosening in rotating machinery, conveyor systems, and equipment subjected to counter-clockwise forces. The coarse metric thread with a 1.25mm pitch ensures reliable engagement in materials prone to vibration, reducing maintenance downtime. Its fully threaded M8x25mm design provides consistent clamping force, making it ideal for automotive, manufacturing, and heavy machinery applications that demand left-hand thread solutions for safety and performance.
Specification Summary & Compliance
This screw adheres to precise Class 6g thread fit tolerances per ISO metric standards, ensuring compatibility and interchangeability. It meets ASME B18.2.3.1M and ISO 898-1 specifications for dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting environmentally responsible sourcing and use in global markets.
