S-91263A844 M8 x 20 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength and Class 10.9 rating for reliable performance in demanding applications
• Superior corrosion resistance through zinc-plated alloy steel construction, extending service life in harsh industrial environments
• Precise flush mounting with 90° countersink angle and flat head design for seamless surface integration
• Easy installation and removal with 5mm hex drive that provides secure tool engagement and prevents stripping
• Consistent threading performance through fully threaded M8 design with Class 6g fit for reliable fastening integrity
• Optimized for high-vibration applications with coarse 1.25mm pitch threads that maintain secure connections under dynamic loads
• Enhanced durability with Rockwell C32 hardness that resists wear and deformation during repeated use

Professional Applications & Engineering Value

These high-strength flat head screws deliver exceptional engineering value in industrial applications where reliability is critical. The zinc-plated alloy steel construction provides superior corrosion protection for machinery, equipment frames, and structural assemblies exposed to challenging environments. The M8 coarse thread with 1.25mm pitch ensures secure fastening in materials prone to vibration loosening, while the fully threaded design maximizes grip length for enhanced load distribution. The 90° countersink angle and flat head profile create flush surfaces ideal for applications where protruding fasteners could interfere with moving parts or require aerodynamic smoothness. These Class 10.9 metric screws are engineered to maintain clamping force under extreme conditions, making them perfect for heavy machinery, automotive components, and industrial equipment where failure is not an option.

Specification Summary & Compliance

Manufactured to DIN 7991/ISO 10642 standards with Class 6g thread fit ensuring precise dimensional accuracy and interchangeability. The fully threaded M8 x 1.25mm configuration with 20mm length provides consistent performance across applications. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and regulatory acceptance for industrial use worldwide. The Class 10.9 strength rating and Rockwell C32 hardness verify mechanical properties suitable for high-stress applications requiring reliable fastening solutions.