S-91263A479 M8 x 70 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure
• Superior corrosion resistance from zinc-plated alloy steel construction extends service life in harsh industrial environments
• Precision Class 5g6g thread fit provides consistent engagement and vibration resistance in assembled components
• Optimized partial threading with M8x1.25mm coarse pitch delivers faster installation and secure clamping force distribution
• Rockwell C39 hardness rating maintains structural integrity under heavy loads and repeated use
• Standard 90° countersink angle enables flush mounting for clean, professional finishes in visible applications
• 5mm hex drive compatibility allows for high-torque installation using common industrial tools

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Class 12.9 metric flat head screws solve critical fastening challenges in machinery, equipment manufacturing, and structural assemblies. The zinc-plated alloy steel construction provides essential corrosion protection while maintaining the 170,000 psi tensile strength required for heavy-duty applications. The partially threaded M8 design with 1.25mm coarse pitch ensures rapid installation and superior clamping force in materials ranging from steel frames to industrial components. The flat head profile with standard 90° countersink creates seamless, flush surfaces that eliminate protrusions in precision equipment and visible assemblies, while the hex drive system accommodates high-torque installation tools common in manufacturing environments.

Specification Summary & Compliance

This M8 flat head screw features precise Class 5g6g thread fit tolerance per metric standards, ensuring consistent performance across industrial applications. Manufacturing complies with DIN 7991 specifications for dimensional accuracy and mechanical properties. The fastener meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for global industrial supply chains and environmentally conscious manufacturing operations.