S-91280A888 M20 x 65 mm ISO 4014, DIN 931, SAE J1199, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capability with 110,000 psi tensile strength and Class 8.8 grade, ensuring reliable performance in demanding applications
• Enhanced corrosion resistance through zinc plating, providing durable protection against industrial environments
• Optimized torque transmission with external hex drive and 30mm head width, allowing for secure installation with standard tools
• Precision thread engagement with M20 coarse (2.5mm pitch) threads and Class 6h fit, enabling faster assembly and reduced cross-threading risks
• Versatile partial threading design combining 46mm minimum threaded length with 65mm overall length, ideal for applications requiring both clamping and alignment
• Consistent mechanical properties with Rockwell C21 hardness, maintaining dimensional stability under vibration and stress
• Global compliance assurance meeting ISO 4014, DIN 931, and SAE J1199 standards while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

These M20 hex head screws deliver exceptional engineering value through their Class 8.8 steel construction and metric coarse threading, specifically designed to address common industrial fastening challenges. The partially threaded configuration provides optimal stress distribution between clamped components while the zinc plated finish ensures long-term corrosion protection in harsh environments. With external hex drive and standardized dimensions, these industrial fasteners enable rapid installation in heavy machinery, structural steel connections, and equipment assembly where vibration resistance and consistent clamping force are critical. The combination of 110,000 psi tensile strength and precise Class 6h thread fit eliminates premature failure risks in high-load applications, making them ideal for construction, manufacturing, and automotive sectors requiring reliable, standardized metric fasteners.

Specification Summary & Compliance

Manufactured to exacting ISO 4014 and DIN 931 specifications with Class 6h thread tolerance and 2.5mm coarse pitch threading. These hex head screws comply with SAE J1199 mechanical requirements and maintain full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The Class 8.8 strength rating and Rockwell C21 hardness ensure consistent performance across industrial applications where standardized metric fasteners are specified.