S-91304A177 M12 x 50 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with Class 10.9 strength rating and 120,000 psi tensile strength for reliable performance in high-stress assemblies.
• Superior corrosion resistance thanks to the blue-dyed zinc plating on alloy steel, extending service life in demanding environments.
• Precise and secure fastening ensured by Class 6g thread fit and coarse M12 x 1.75mm thread, reducing the risk of cross-threading and loosening.
• Efficient installation and flush finish with a standard 90° countersink angle and 8mm hex drive, allowing for quick, tool-compatible seating.
• Full thread engagement along the 50mm length provides maximum grip and distribution of clamping force across joined materials.
• High durability and wear resistance from Rockwell C32 hardness, maintaining fastener integrity under repeated loads and vibrations.
• Compliance with international standards including DIN 7991/ISO 10642, ensuring interchangeability and quality in global engineering applications.

Professional Applications & Engineering Value

This M12 flat head screw is engineered to address critical challenges in industrial fastening, where vibration resistance, high tensile demands, and environmental factors are paramount. The blue-dyed zinc-plated alloy steel construction offers enhanced protection against corrosion, making it ideal for machinery, automotive subassemblies, and structural frameworks exposed to moisture or chemicals. The coarse thread metric design with Class 6g thread fit ensures rapid, reliable installation without sacrificing precision, reducing assembly time and minimizing failure risks. With a 90° countersink angle and fully threaded profile, it delivers a seamless, low-profile finish that maintains aerodynamic or aesthetic requirements in heavy-duty applications, from conveyor systems to equipment enclosures.

Specification Summary & Compliance

This fastener adheres to precise dimensional and performance criteria, including Class 6g thread fit per ISO metric standards, M12 x 1.75mm coarse thread specifications, and manufacturing conformity with DIN 7991 / ISO 10642. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability in line with global directives.