S-90447A630 M12 x 85 mm DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure
• Class 10.9 strength grade provides superior load-bearing capacity for heavy-duty industrial assemblies and machinery
• Rockwell C32 hardness offers excellent resistance to wear and deformation, extending service life in high-vibration environments
• Coarse 1.75mm pitch threading enables faster installation and superior grip in softer materials or where rapid assembly is required
• Partial threading design allows for precise clamping force control and prevents over-tightening in critical joint applications
• External hex drive with 19mm head provides secure tool engagement and high torque transmission capability
• Black steel construction offers basic corrosion resistance while maintaining cost-effectiveness for industrial applications

Professional Applications & Engineering Value

This M12 hex head screw delivers exceptional engineering value through its Class 10.9 steel construction and DIN 931 standard compliance. The combination of 150,000 psi tensile strength and Rockwell C32 hardness addresses critical challenges in heavy machinery, structural steelwork, and industrial equipment where vibration resistance and joint integrity are paramount. The coarse metric thread with 1.75mm pitch ensures reliable performance in cast iron, aluminum, and softer materials by providing superior pull-out resistance. The partially threaded design allows engineers to precisely control clamping force distribution, preventing stress concentration in critical sections. These hex head screws are particularly valuable in construction, automotive assembly, and manufacturing applications where high-strength fastening solutions must withstand dynamic loads and environmental stresses while maintaining dimensional stability.

Specification Summary & Compliance

This M12 x 1.75mm hex head screw features Class 6g thread fit tolerance for precise engagement and maintains 85mm length with 30mm minimum thread length. Manufactured to DIN 931 standard specifications, ensuring dimensional accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) compliant and meets REACH (EC 1907/2006) requirements, confirming environmental regulatory adherence for global industrial applications. The external hex drive with 19mm head width and 7.5mm height provides standardized tool compatibility across industrial maintenance and assembly operations.