S-91280A308 M12 x 70 mm ISO 4014, DIN 931 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 8.8 strength grade and 110,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance and durability thanks to black steel construction and compliance with RoHS 3 and REACH environmental standards
• Precise thread engagement with Class 6g thread fit ensuring consistent fastening and vibration resistance in industrial assemblies
• Optimized partial threading providing unthreaded shank strength where needed while maintaining full thread engagement in critical sections
• Easy installation and removal with standard 19mm external hex head design compatible with common wrench tools
• Reliable coarse thread performance with 1.75mm pitch offering quick assembly and reduced cross-threading risks in production environments
• Consistent dimensional accuracy meeting ISO 4014/DIN 931 specifications for interchangeability across global manufacturing operations

Professional Applications & Engineering Value

Engineered for industrial machinery assembly and structural steel connections, these M12 hex head screws deliver critical performance where vibration resistance and tensile strength are paramount. The Class 8.8 steel construction with Rockwell C21 hardness provides exceptional durability against mechanical stress, while the partially threaded design offers superior shear strength in bolted joints. The coarse metric thread with 1.75mm pitch ensures rapid installation in production lines and maintains integrity in high-vibration environments. External hex drive compatibility with standard tools simplifies maintenance operations, making these ISO 4014/DIN 931 compliant fasteners ideal for automotive, construction, and heavy equipment applications requiring reliable, repeatable fastening solutions.

Specification Summary & Compliance

This M12 x 1.75 x 70mm hex head screw features Class 6g thread fit tolerance with right-hand coarse threading and partial threading configuration. Manufactured to ISO 4014/DIN 931 standards with precise dimensional control including 19mm head width and 7.7mm head height. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global industrial markets.