S-91280A883 M20 x 40 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 corrosion resistance with zinc plating, extending service life in harsh industrial environments
• Exceptional mechanical strength with 110,000 psi tensile strength and Class 8.8 grade for heavy-duty applications
• Reliable thread engagement with coarse M20x2.5 threads and Class 6h fit ensuring secure fastening
• Optimized torque transmission through external hex drive and 30mm head width for easy installation
• Consistent performance with Rockwell C21 hardness maintaining structural integrity under stress
• Global compatibility meeting ISO 4017, DIN 933, and SAE J1199 standards for international projects
• Environmental compliance with RoHS 3 and REACH regulations for sustainable operations

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this M20 hex head screw delivers critical reliability in heavy machinery, structural steel connections, and equipment assembly. The Class 8.8 steel construction provides consistent high tensile strength to withstand dynamic loads and vibration, while the fully threaded design ensures maximum grip length for joint stability. Zinc plating combats corrosion in manufacturing facilities and outdoor installations, and the coarse metric thread facilitates quick assembly in steel-to-steel connections. With ISO 4017 compliance, it guarantees dimensional accuracy for replacement parts and new builds across global engineering standards.

Specification Summary & Compliance

This 40mm length hex head screw features M20x2.5 coarse threads with Class 6h thread fit per ISO metric standards. Manufactured to ISO 4017 and DIN 933 dimensional specifications and ISO 898 mechanical property requirements. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, and meets SAE J1199 standards for quality assurance.