S-91290A116 M8 x 85 mm DIN 912 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi from Class 12.9 alloy steel ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by the black-oxide coating extends service life and maintains appearance in demanding industrial environments.
• Precise torque transmission with a 6mm hex drive and standard socket head profile allows for secure installation and easy maintenance with common tools.
• Optimized load distribution through the partially threaded design with 28mm thread length minimizes stress concentration and enhances joint integrity.
• Consistent thread engagement ensured by Class 5g6g thread fit and coarse M8x1.25mm thread reduces cross-threading risks and speeds up assembly.
• High durability and wear resistance from Rockwell C37 hardness maintains fastener integrity under repeated loads and vibrations.
• Broad regulatory compliance with DIN 912, RoHS 3, and REACH standards guarantees safety and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

Engineered for high-performance industrial fastening, this M8 socket head cap screw addresses critical challenges in machinery, automotive, and heavy equipment assembly. The Class 12.9 alloy steel construction, combined with a black-oxide surface treatment, provides exceptional resistance to corrosion and wear, reducing maintenance downtime in harsh conditions. Its partially threaded metric design with a coarse thread pitch ensures rapid installation and reliable clamping force, while the hex drive style allows for high-torque applications without slippage. Ideal for securing components subject to dynamic loads, this screw delivers enhanced engineering value by prolonging equipment life and ensuring operational safety under extreme stress.

Specification Summary & Compliance

This screw features precise Class 5g6g thread fit per ISO standards, ensuring dimensional accuracy for consistent performance. It meets DIN 912 specifications for socket head cap screws, covering head dimensions and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free of hazardous substances, supporting sustainable manufacturing practices. The metric coarse threading (M8x1.25mm) and partial threading with a minimum length of 28mm adhere to industry norms for reliable fastening in diverse applications.