S-91280A747 M12 x 140 mm ISO 4014, DIN 931, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure
• Class 8.8 strength grade provides consistent mechanical properties for predictable load-bearing capacity in structural assemblies
• Zinc plating finish offers superior corrosion resistance, extending service life in harsh industrial environments
• Partially threaded design combines secure clamping with unthreaded shank strength, ideal for applications requiring precise grip length
• Coarse M12 x 1.75mm thread enables faster installation and better debris resistance compared to fine threads
• External hex drive with 19mm head allows for high-torque installation using standard tools, improving assembly efficiency
• Rockwell C21 hardness maintains thread integrity through multiple installation cycles, reducing wear and maintenance costs

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Class 8.8 steel hex head screws deliver exceptional performance where vibration resistance and structural integrity are critical. The partially threaded configuration provides optimal stress distribution, making them ideal for machinery assembly, structural steel connections, and equipment manufacturing. The zinc plated finish protects against corrosion in challenging environments while maintaining electrical conductivity. With M12 coarse threading and Class 6h thread fit, these fasteners ensure precise engagement and reliable clamping force in high-vibration settings. The combination of 110,000 psi tensile strength and standardized dimensions per DIN 931/ISO 4014 makes them suitable for replacement parts in OEM equipment and maintenance applications requiring certified components.

Specification Summary & Compliance

This metric hex head screw features precise Class 6h thread fit tolerance and complies with ISO 4014/DIN 931 dimensional standards and ISO 898 mechanical property requirements. The fastener maintains M12 x 1.75mm coarse thread specifications with 30mm minimum thread length on a 140mm overall length. Manufacturing and material compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets and environmentally conscious manufacturing operations.