S-91280A902 M20 x 180 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

• Exceptional load-bearing capacity with Class 8.8 strength grade and 110,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Optimized thread engagement with Class 6h thread fit and coarse 2.5mm pitch ensuring secure fastening and vibration resistance
• Enhanced durability from Rockwell C21 hardened steel construction, maintaining integrity under repeated stress
• Efficient installation and removal with external hex drive and 30mm head width for standard tool compatibility
• Reduced material stress concentration through partial threading design along the 180mm length
• Global compliance assurance meeting ISO 4014, DIN 931, and SAE J1199 standards for international project compatibility

Professional Applications & Engineering Value

This M20 hex head screw delivers critical engineering solutions for heavy-duty industrial applications where structural integrity is paramount. The Class 8.8 steel construction combined with Rockwell C21 hardness provides exceptional resistance to shear forces and tensile loads, making it ideal for construction machinery, structural steel connections, and industrial equipment assembly. The zinc plated finish offers reliable corrosion protection in environments exposed to moisture and chemicals, while the coarse metric thread with 2.5mm pitch ensures rapid installation and superior vibration resistance. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening in dynamic loading conditions common in manufacturing and infrastructure projects.

Specification Summary & Compliance

This metric hex head screw features precise Class 6h thread fit tolerance and M20 x 2.5mm coarse thread specifications compliant with ISO 4014 and DIN 931 manufacturing standards. The fastener meets SAE J1199 requirements and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. Manufactured to ISO 898 mechanical property standards, this screw maintains consistent dimensional accuracy and mechanical performance for critical bolting applications.