S-97760A431 M8 x 30 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
- Superior torque transmission with external hex drive design for reliable tightening in high-stress applications
- Exceptional mechanical strength with Class 8.8 steel construction supporting 110,000 psi tensile strength
- Optimized thread engagement through Class 6g thread fit ensuring precise mating with components
- Left-hand threading capability providing secure fastening in counter-rotating or specialized machinery
- Enhanced durability with Rockwell C21 hardness resisting wear and deformation under load
- Full-threaded design offering consistent clamping force along the entire 30mm length
- Regulatory compliance assurance meeting international standards for quality and environmental safety
Professional Applications & Engineering Value
This M8 left-hand hex head screw addresses critical engineering challenges in industrial settings where reverse-rotation forces or specialized equipment configurations require left-hand threading. The Class 8.8 steel construction provides reliable performance in high-vibration environments, while the coarse metric thread with 1.25mm pitch ensures rapid assembly and reduced cross-threading risks. The external hex drive delivers maximum torque transmission for secure fastening in machinery, automotive, and heavy equipment applications. With full threading along its 30mm length, it maintains consistent clamping pressure across joined components, preventing loosening under dynamic loads. These steel fasteners are engineered to withstand demanding conditions while maintaining structural integrity.
Specification Summary & Compliance
Manufactured to Class 6g thread fit tolerance standards with metric coarse threading (M8x1.25). Complies with ASME B18.2.3.1M and ISO 898-1 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. The 30mm length provides standardized dimensional consistency for industrial applications requiring precise fastener sizing.
