S-91263A921 M8 x 65 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with Class 10.9 tensile strength (120,000 psi) for reliable performance in high-stress applications
• Enhanced corrosion resistance through zinc-plated alloy steel construction, extending service life in harsh industrial environments
• Precision thread engagement with M8 x 1.25mm coarse pitch and Class 6g fit for quick installation and secure fastening
• Optimized flush mounting with standard 90° flat head profile that sits perfectly countersunk for smooth surface finishes
• Efficient installation and removal via 5mm hex drive that prevents cam-out and allows high torque application
• Full-threaded design providing maximum grip length and uniform stress distribution along the entire 65mm length
• Certified material hardness at Rockwell C32 ensuring consistent performance and resistance to deformation under load

Professional Applications & Engineering Value

These M8 flat head screws deliver exceptional engineering value in demanding industrial applications where reliability and precision are paramount. The zinc-plated alloy steel construction provides superior corrosion protection for machinery, equipment frames, and structural assemblies exposed to challenging environments. The fully threaded design with coarse pitch ensures rapid installation in production lines while maintaining strong holding power. The Class 10.9 strength rating (120,000 psi tensile strength) makes these metric screws ideal for critical connections in automotive components, industrial machinery, and construction applications where vibration resistance and long-term durability are essential. The flat head profile with 90° countersink angle creates seamless, flush surfaces that prevent snagging and improve safety in moving assemblies.

Specification Summary & Compliance

This M8 x 1.25mm flat head screw features precision Class 6g thread fit according to metric standards, ensuring consistent performance across applications. Manufactured to DIN 7991 specifications with complete RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, meeting the latest environmental and safety regulations for industrial components. The fastener maintains dimensional accuracy with 16mm head diameter, 4.4mm head height, and 65mm overall length, providing reliable interchangeability and compatibility with standard metric components and tooling systems.