S-91280A522 M8 x 10 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 110,000 psi tensile strength and Class 8.8 grade steel for reliable performance in demanding applications
• Enhanced corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Optimized installation efficiency with external hex drive and coarse 1.25mm pitch threads for faster assembly and reduced cross-threading risk
• Precision thread engagement with Class 6h fit and full threading for consistent clamping force and vibration resistance
• Superior material durability featuring Rockwell C21 hardness to maintain structural integrity under repeated stress
• Global standard compliance meeting ISO 4017 (DIN 933) specifications for interchangeable use in international projects
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable manufacturing

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these M8 hex head screws deliver critical performance where vibration resistance and structural integrity are paramount. The Class 8.8 steel construction provides reliable strength for machinery assembly, structural frameworks, and equipment manufacturing, while the zinc plating protects against corrosive elements in manufacturing plants and outdoor installations. The coarse metric thread with 1.25mm pitch ensures rapid installation in steel-to-steel connections, reducing assembly time without compromising joint security. With full threading and external hex drive, these fasteners maintain consistent clamping force across the entire engagement length, preventing loosening in high-vibration environments common in automotive, construction, and industrial machinery applications.

Specification Summary & Compliance

This metric hex head screw features M8 x 1.25mm coarse threads with Class 6h thread fit tolerance per ISO standards. Manufacturing complies with ISO 4017 (DIN 933) specifications for dimensional accuracy and mechanical properties. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring restricted substance-free manufacturing. The Class 8.8 strength rating guarantees consistent performance with 110,000 psi tensile strength and Rockwell C21 hardness verification.