S-91310A870 M20 x 40 mm ISO 4017, DIN 933 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with 150,000 psi rating ensures reliable performance in high-stress industrial applications
• Premium Class 10.9 steel construction provides superior durability and resistance to deformation under heavy loads
• Fully threaded M20 coarse pitch design delivers maximum grip and holding power across the entire fastener length
• External hex drive with 30mm head width enables secure tool engagement and efficient installation with standard wrenches
• Rockwell C32 hardness rating maintains structural integrity and prevents thread stripping during repeated use
• Class 6g thread fit tolerance ensures precise mating with compatible nuts and threaded components
• Comprehensive regulatory compliance with ISO 4017, RoHS 3, and REACH standards guarantees quality and environmental safety

Professional Applications & Engineering Value

This M20 hex head screw delivers critical engineering solutions for demanding industrial applications where failure is not an option. The Class 10.9 steel construction combined with 150,000 psi tensile strength provides exceptional load-bearing capacity for heavy machinery, structural steel connections, and equipment assembly. The fully threaded coarse pitch design (2.5mm pitch) ensures maximum thread engagement and vibration resistance in high-stress environments. The external hex drive with 30mm head width allows for high-torque installation without slippage, while the right-hand thread direction provides standard compatibility across industrial applications. These metric hex head screws are engineered to withstand extreme conditions while maintaining structural integrity, making them ideal for construction, manufacturing, and automotive applications where reliability is paramount.

Specification Summary & Compliance

This high-strength hex head screw features precise Class 6g thread fit tolerance according to metric standards, ensuring optimal compatibility with mating components. The fastener meets ISO 4017 specifications (equivalent to DIN 933) for dimensional accuracy and manufacturing quality. Regulatory compliance includes RoHS 3 (2015/863/EU) for hazardous substance restriction and REACH (EC 1907/2006) for chemical safety. The 40mm length and fully threaded coarse spacing provide consistent performance across industrial applications requiring reliable, high-strength fastening solutions.