S-91280A885 M20 x 50 mm ISO 4017, DIN 933, SAE J1199, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 110,000 psi tensile strength and Class 8.8 rating for reliable performance in demanding applications
• Enhanced corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Optimized torque transmission with external hex head design providing secure tool engagement and efficient installation
• Precision threading compatibility with M20 coarse (2.5mm pitch) Class 6h threads ensuring consistent fit and vibration resistance
• Full-length threading offering maximum grip length and uniform stress distribution across the entire fastener
• Certified material hardness at Rockwell C21 providing excellent wear resistance and durability
• Global compliance assurance meeting ISO 4017, DIN 933, and SAE J1199 standards for international project compatibility

Professional Applications & Engineering Value

This M20 hex head screw delivers exceptional engineering value through its Class 8.8 steel construction and zinc plated finish, specifically engineered to address common industrial challenges. The fully threaded metric screw design with coarse threading provides superior holding power in structural assemblies, machinery frames, and heavy equipment where vibration resistance is critical. The external hex drive configuration ensures reliable torque application during installation, reducing the risk of stripping while maintaining consistent clamping force. With its right-hand thread direction and Class 6h thread fit, this fastener offers precise engagement in steel-to-steel applications, preventing loosening under dynamic loads while accommodating standard manufacturing tolerances.

Specification Summary & Compliance

This hex head screw maintains precise dimensional accuracy with Class 6h thread fit per ISO metric standards and manufacturing specifications compliant with ISO 4017, DIN 933, and SAE J1199. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, ensuring environmental responsibility and workplace safety. The 50mm length with 30mm head width and 12.5mm head height provides standardized dimensions for consistent performance across industrial applications requiring M20 coarse thread fasteners.