S-91290A159 M48 x 260 mm DIN 912 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 170,000 psi tensile strength for reliable performance in the most demanding applications
• Superior corrosion and wear resistance thanks to the black-oxide coating on alloy steel, extending service life
• High fatigue resistance and durability from Class 12.9 strength rating and Rockwell C37 hardness
• Secure, high-torque installation enabled by the 36 mm hex socket drive and standard socket head profile
• Optimized for heavy-duty assembly with coarse 5 mm pitch threads ensuring faster installation and reduced cross-threading risk
• Precise thread engagement and fit due to Class 5g6g thread tolerance, minimizing loosening under vibration
• Versatile partial threading design allowing for both clamped joint integrity and unthreaded shaft clearance

Professional Applications & Engineering Value

This M48 socket head cap screw is engineered to address critical challenges in heavy machinery, construction equipment, and high-stress structural frameworks. The Class 12.9 alloy steel construction, combined with the black-oxide surface treatment, provides outstanding resistance to environmental degradation and mechanical wear, making it ideal for outdoor or corrosive environments. The coarse metric thread (5 mm pitch) ensures rapid assembly and disassembly, reducing labor time in maintenance-intensive operations. Its partially threaded rod design concentrates strength where needed, preventing thread damage in non-clamping zones. These features collectively solve common industrial pain points like joint failure, fastener seizure, and assembly inefficiency, delivering long-term reliability in high-performance applications.

Specification Summary & Compliance

This screw adheres to DIN 912 specifications, ensuring dimensional consistency and mechanical performance. Threads are manufactured to Class 5g6g tolerance for precise fit. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its environmental safety and regulatory acceptance for industrial use worldwide.