S-91310A726 M12 x 55 mm ISO 4014, DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior hardness and durability with Rockwell C32 rating to resist wear and deformation under heavy loads
• Optimized thread engagement through Class 6g thread fit ensuring secure fastening and vibration resistance
• Enhanced installation efficiency with external hex drive and 19mm head width for quick tool engagement
• Versatile partial threading design providing both threaded and unthreaded sections for precise clamping control
• Reliable coarse thread pitch (1.75mm) enabling faster assembly and reduced cross-threading risks
• Industry-standard compatibility meeting ISO 4014 specifications for consistent performance across applications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Class 10.9 steel hex head screws deliver critical reliability where failure is not an option. The M12 x 1.75mm coarse thread configuration provides superior resistance to vibration loosening in heavy machinery, construction equipment, and automotive assemblies. The partially threaded design allows for precise clamping force distribution, preventing joint distortion while the external hex drive ensures maximum torque transmission during installation. With 150,000 psi tensile strength and hardened steel construction, these metric screws maintain structural integrity under extreme dynamic loads, making them ideal for critical connections in manufacturing fixtures, structural steelwork, and industrial maintenance applications where consistent performance and safety are paramount.

Specification Summary & Compliance

This 55mm length hex head screw features precise Class 6g thread fit tolerance and M12 x 1.75mm coarse thread spacing according to ISO 4014 specifications (equivalent to DIN 931). The fastener meets Class 10.9 strength grade requirements with verified mechanical properties. Manufacturing and material compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for industrial applications with strict chemical substance restrictions.