S-91280A720 M12 x 40 mm ISO 4017, DIN 933, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws
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 protection with zinc plating for extended service life in demanding environments
- High-strength performance with Class 8.8 grade and 110,000 psi tensile strength for reliable load-bearing applications
- Optimized torque transmission through the external hex drive and 19mm head width for secure installation
- Excellent thread engagement with fully threaded M12 coarse thread (1.75mm pitch) for faster assembly
- Precision dimensional accuracy with Class 6h thread fit ensuring consistent performance and interchangeability
- Enhanced durability with Rockwell C21 hardness providing resistance to wear and deformation
- Global compliance assurance meeting ISO 4017/DIN 933 standards and RoHS 3/REACH environmental regulations
Professional Applications & Engineering Value
These M12 hex head screws deliver exceptional engineering value in industrial assembly and construction applications where vibration resistance and structural integrity are critical. The Class 8.8 steel construction provides the optimal balance of strength and ductility, preventing sudden failure under dynamic loads. The fully threaded metric coarse thread design ensures maximum thread engagement in various materials, while the zinc plating surface treatment creates a protective barrier against corrosion in harsh environments. The external hex drive configuration allows for high-torque installation using standard tools, making these heavy-duty screws ideal for machinery, structural frameworks, and equipment manufacturing where reliability cannot be compromised.
Specification Summary & Compliance
This metric screw features precise M12 x 1.75mm coarse thread with Class 6h thread fit tolerance, 40mm length, and complies with ISO 4017/DIN 933 manufacturing specifications. The fastener meets ISO 898 mechanical property requirements for Class 8.8 strength grade and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
