S-91280A643 M10 x 55 mm ISO 4014, DIN 931, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capability with Class 8.8 strength grade and 110,000 psi tensile strength for reliable performance in demanding applications
• Enhanced corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Optimized clamping force distribution with partially threaded design that prevents joint loosening under vibration
• Precise thread engagement with Class 6h thread fit and M10x1.5 coarse thread pattern for quick installation and secure fastening
• Robust drive system featuring external hex head design (17mm width) for high-torque application with standard tools
• Consistent mechanical properties with Rockwell C21 hardness ensuring dimensional stability under stress
• Global compliance assurance meeting ISO 4014, DIN 931, RoHS 3 and REACH standards for international project specifications

Professional Applications & Engineering Value

These M10 hex head screws deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The Class 8.8 steel construction provides exceptional tensile strength for heavy machinery, structural steel connections, and industrial equipment assembly. The partially threaded configuration creates an unthreaded shank section that significantly improves fatigue resistance compared to fully threaded alternatives, while the metric coarse thread (1.5mm pitch) enables rapid installation in production environments. The zinc plated finish offers substantial corrosion protection for outdoor applications or humid operating conditions. These industrial fasteners are engineered to maintain clamping force in high-vibration settings common in manufacturing equipment, construction frameworks, and transportation infrastructure.

Specification Summary & Compliance

This M10 hex head screw features precise Class 6h thread fit tolerance per ISO metric standards, ensuring consistent engagement in threaded holes. Manufacturing complies with ISO 4014 and DIN 931 specifications for dimensional accuracy and mechanical properties. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. With 55mm length and 26mm minimum thread length, these screws provide reliable performance across various material thicknesses while maintaining the structural integrity required for heavy-duty applications.