S-91310A133 M8 x 70 mm ISO 4017, DIN 933 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance and durability thanks to black steel construction meeting rigorous industrial standards
• Precise thread engagement with Class 6g fit and coarse 1.25mm pitch for faster installation and reduced cross-threading risk
• Optimized torque transmission through external hex drive design that prevents tool slippage during tightening
• Full-length threading provides consistent clamping force along the entire 70mm length for uniform stress distribution
• Certified material integrity with Rockwell C32 hardness ensuring maintained mechanical properties under repeated loads
• Global compliance assurance meeting ISO 4017, RoHS 3, and REACH standards for international project specifications

Professional Applications & Engineering Value

This M8 hex head screw delivers critical engineering solutions where high-strength fastening is paramount. The Class 10.9 steel construction provides exceptional resistance to vibration loosening and fatigue failure in heavy machinery, structural frameworks, and automotive assemblies. With its fully threaded metric design and coarse 1.25mm pitch, installation time is significantly reduced while maintaining secure connections in high-vibration environments. The external hex drive enables efficient torque application with standard tools, preventing stripping and ensuring consistent clamping force. These industrial screws are engineered to withstand extreme mechanical stresses while the black surface treatment offers additional corrosion protection for demanding operational conditions.

Specification Summary & Compliance

Manufactured to ISO 4017 standards (equivalent to DIN 933) with Class 6g thread tolerance ensuring precise fitment. The metric coarse thread (M8 x 1.25mm) provides optimal performance in most industrial applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe usage across global markets. The 70mm length with complete threading maintains dimensional accuracy per international metric fastener specifications.