S-91290A060 M18 x 140 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength: With a tensile strength of 170,000 PSI, this screw provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance: The black-oxide finish on alloy steel offers enhanced protection against rust and corrosion, extending service life in harsh environments.
• High-Strength Class 12.9 Rating: Ensures maximum load-bearing capacity and fatigue resistance, ideal for critical assemblies requiring dependable holding power.
• Precision Hex Drive Design: The 14mm hex socket allows for secure tool engagement and high torque application, minimizing stripping and improving installation efficiency.
• Optimized Thread Engagement: The M18 x 2.5mm coarse thread and Class 5g6g fit provide easy alignment and strong holding in a variety of materials, speeding up assembly processes.
• Partially Threaded Shank: Offers improved clamping force distribution and reduced thread galling, enhancing joint integrity in dynamic load conditions.
• Compliance with International Standards: Meets DIN 912/ISO 4762 specifications, ensuring dimensional accuracy and interchangeability in global engineering projects.

Professional Applications & Engineering Value

This M18 socket head cap screw is engineered to address common industrial challenges such as vibration loosening, high tensile stress, and corrosive operating conditions. The black-oxide alloy steel construction not only resists oxidation but also maintains its Rockwell C37 hardness under heavy loads, making it suitable for machinery, automotive assemblies, and structural frameworks. The coarse metric thread with a 2.5mm pitch ensures quick installation and reliable performance in materials where fine threads might be prone to damage. By utilizing a partially threaded design, it minimizes stress concentration points, which is critical in applications involving repeated dynamic forces. Its compliance with DIN 912 and ISO 4762 standards guarantees precise dimensions and consistent quality, reducing downtime and maintenance costs in heavy-duty industrial settings.

Specification Summary & Compliance

This screw features a metric coarse thread with M18 x 2.5mm dimensions and a Class 5g6g thread fit, ensuring tight tolerances for secure fastening. It adheres to DIN 912 (identical to ISO 4762) for head and drive specifications, providing reliable interchangeability. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming it meets stringent environmental and safety regulations for use in various international markets.