S-91310A550 M8 x 60 mm ISO 4014, DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with Class 10.9 strength rating and 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance and durability thanks to high-grade steel construction and Rockwell C32 hardness
• Optimized for quick installation with external hex drive design providing secure tool engagement and efficient assembly
• Enhanced vibration resistance through coarse thread spacing (1.25mm pitch) maintaining secure fastening in dynamic environments
• Precision threading compliance with Class 6g thread fit ensuring consistent mating and reduced assembly issues
• Versatile partial threading design allowing both clamping and alignment functions in various industrial applications
• Environmental regulation compliance meeting RoHS 3 and REACH standards for safe usage across global markets

Professional Applications & Engineering Value

Engineered for demanding industrial and construction applications, these M8 hex head screws deliver critical performance where fastener failure is not an option. The Class 10.9 steel construction provides exceptional resistance to shear and tensile forces, while the Rockwell C32 hardness ensures minimal wear during repeated installations. The coarse metric thread with 1.25mm pitch offers superior vibration resistance compared to fine-thread alternatives, maintaining clamp load in high-vibration environments like machinery, structural steel connections, and heavy equipment. The partially threaded design allows the unthreaded shank to act as a precision dowel, providing accurate alignment while the threaded portion delivers secure fastening. With ISO 4014 DIN 931 compliance, these screws guarantee dimensional accuracy and interchangeability across global engineering projects.

Specification Summary & Compliance

This high-strength hex head screw features precise M8 x 1.25mm coarse threading with Class 6g thread fit tolerance ensuring proper engagement with standard nuts and tapped holes. Manufacturing follows ISO 4014 DIN 931 specifications for dimensional accuracy and mechanical properties. The fastener meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) standards for chemical safety, making it suitable for international industrial applications requiring environmental regulation adherence.