S-91290A090 M20 x 300 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength: With a Class 12.9 rating and 170,000 psi tensile strength, 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 wear, extending service life in harsh industrial environments.
• Precise Thread Engagement: Featuring a coarse M20 x 2.5mm thread with Class 5g6g fit, it ensures easy installation and secure fastening, minimizing assembly time and improving joint integrity.
• Optimized Drive Efficiency: The 17mm hex socket drive and standard socket head profile allow for high torque application with standard tools, preventing stripping and ensuring consistent clamping force.
• Durable Material Hardness: Rockwell C37 hardness provides excellent resistance to deformation and fatigue, maintaining fastener integrity under repetitive loads.
• Versatile Partially Threaded Design: With a 52mm minimum thread length on a 300mm rod, it offers flexibility for applications requiring both threaded and unthreaded sections, enhancing design adaptability.
• Global Compliance Assurance: Meets DIN 912/ISO 4762 standards and is RoHS 3 and REACH compliant, ensuring safety and regulatory acceptance for international industrial use.

Professional Applications & Engineering Value

This M20 socket head cap screw is engineered to address critical challenges in heavy-duty machinery, automotive assemblies, and structural frameworks where vibration and dynamic loads are common. The Black-Oxide alloy steel construction combats corrosion, while the Class 12.9 strength rating and 170,000 psi tensile strength prevent shear and tensile failures under extreme conditions. The coarse metric thread with a 2.5mm pitch facilitates quick installation in coarse-grained materials, reducing assembly errors. Its partially threaded rod design allows precise load distribution, making it ideal for applications requiring adjustable clamping, such as in conveyor systems or precision equipment mounts. By adhering to DIN 912/ISO 4762 specifications, it ensures dimensional accuracy and interoperability, minimizing downtime and enhancing operational reliability in demanding industrial settings.

Specification Summary & Compliance

This product features a Class 5g6g thread fit per ISO metric standards, ensuring precise tolerance for reliable engagement. It complies with DIN 912 (identical to ISO 4762) for dimensional consistency, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for industrial use. The specifications guarantee high performance in applications requiring exact thread spacing and strength class adherence.