S-97760A918 M8 x 16 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 corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
- High-strength performance with Class 8.8 rating and 110,000 PSI tensile strength for demanding mechanical applications
- Secure anti-loosening capability through left-hand thread design ideal for rotating machinery and specialized equipment
- Optimized thread engagement with coarse 1.25mm pitch ensuring reliable fastening in various materials
- Precision dimensional control with Class 6h thread fit for consistent installation and uniform clamping force
- Enhanced installation efficiency with external hex drive and standard 13mm head width for common tool compatibility
- Full-thread coverage along the 16mm length provides maximum grip and load distribution
Professional Applications & Engineering Value
This M8 left-hand hex head screw delivers critical engineering solutions where conventional right-hand threads would loosen under rotational forces. The Class 8.8 steel construction with Rockwell C21 hardness provides the structural integrity needed for high-stress mechanical assemblies, while the zinc plating offers essential corrosion protection in industrial environments. The coarse 1.25mm pitch metric thread ensures rapid installation and superior holding power in soft materials or where vibration resistance is paramount. Engineered for machinery, conveyor systems, and specialized equipment requiring left-hand threading, this fastener prevents unintended disassembly in counter-rotational applications, making it indispensable for maintenance-critical operations and safety-conscious installations.
Specification Summary & Compliance
This metric hex head screw features precise M8 x 1.25mm coarse threading with Class 6h thread fit tolerance ensuring dimensional accuracy. The fastener complies with ASME B18.2.3.1M and ISO 898-1 specifications governing mechanical properties and dimensional requirements. Manufactured from steel with zinc-plated finish, the screw delivers consistent performance with full 16mm length threading and meets international standards for industrial fastener applications.
