S-91180A726 M12 x 55 mm ISO 8765, DIN 960 Medium-Strength Metric Class 8.8 Steel Hex Head Screws
Medium-Strength Metric Class 8.8 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
- Exceptional mechanical strength with Class 8.8 rating (110,000 PSI tensile) for reliable performance under high stress
- Precision thread engagement with M12 x 1.25mm extra fine pitch ensuring secure fastening in critical applications
- Optimized torque transmission through external hex drive and 19mm head width for efficient installation
- Enhanced fatigue resistance with Rockwell C21 hardness maintaining structural integrity through repeated loading cycles
- Versatile partial threading design allowing both clamping and alignment functions in assembly operations
- Comprehensive regulatory compliance meeting international standards for safety and environmental requirements
Professional Applications & Engineering Value
This M12 hex head screw delivers critical engineering solutions through its Class 8.8 steel construction and zinc plated finish. The extra fine 1.25mm pitch metric thread provides superior vibration resistance and precise load distribution, making it ideal for machinery, automotive assemblies, and structural frameworks where loosening prevention is paramount. The partially threaded design combines the benefits of full shank strength in unthreaded sections with secure fastening in threaded areas, addressing common stress concentration issues. With external hex drive configuration and standardized dimensions, it ensures compatibility with industrial tools while maintaining consistent clamping force in high-cycle manufacturing environments.
Specification Summary & Compliance
Manufactured to ISO 8765/DIN 960 standards with Class 6h thread fit tolerance for precision engagement. The fastener maintains dimensional accuracy with 55mm total length and 30mm minimum thread length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across international markets. Mechanical properties include Rockwell C21 hardness and 110,000 PSI tensile strength as specified for Class 8.8 strength grade metric fasteners.
