S-91304A174 M12 x 45 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional durability with Class 10.9 high-strength alloy steel, ensuring reliable performance under heavy loads and high-stress conditions.
• Superior corrosion resistance from blue-dyed zinc plating, extending service life in harsh or outdoor industrial environments.
• Precise and secure fastening with Class 6g thread fit and coarse threading, reducing the risk of cross-threading and enabling quick installation.
• Optimal flush mounting thanks to the standard flat head profile and 90° countersink angle, providing a smooth, unobtrusive finish in assembled components.
• Easy installation and removal with an 8mm hex drive, allowing for high torque application without slipping, ideal for repetitive assembly tasks.
• Full thread engagement across the 45mm length, ensuring maximum grip and uniform stress distribution in demanding applications.
• Compliance with international standards including DIN 7991/ISO 10642, guaranteeing consistent quality and interchangeability in global projects.

Professional Applications & Engineering Value

These M12 flat head screws are engineered to address critical challenges in industrial assembly, where vibration resistance, structural integrity, and long-term reliability are paramount. The Class 10.9 high-strength alloy steel and Rockwell C32 hardness provide exceptional tensile strength (120,000 psi), making them ideal for heavy machinery, automotive frames, and construction equipment that endure dynamic loads. The blue-dyed zinc-plated finish offers enhanced corrosion protection, reducing maintenance needs in exposed or humid environments. With a coarse thread pitch of 1.75mm and Class 6g thread fit, these metric fasteners ensure quick, secure installation in metals and composites, minimizing assembly time while preventing loosening. The fully threaded design and 90° countersink angle enable flush mounting in pre-drilled holes, essential for applications requiring aerodynamic or smooth surfaces, such as in aerospace, enclosures, and precision engineering assemblies.

Specification Summary & Compliance

This flat head screw features metric M12 x 1.75mm coarse threads with Class 6g tolerance for precise fit, a length of 45mm, and is fully threaded. It meets DIN 7991 and ISO 10642 specifications for dimensional accuracy and performance. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to environmental and safety regulations for hazardous substances.