S-91290A072 M20 x 120 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: Class 12.9 strength rating and 170,000 PSI tensile strength ensure reliable performance under extreme mechanical stress, reducing the risk of fastener failure.
• Superior Corrosion Resistance: Black-oxide finish on alloy steel provides enhanced protection against rust and wear, extending service life in harsh industrial environments.
• Precise, Secure Fastening: Hex socket drive (17mm) and standard socket head profile allow for high-torque application and easy installation in confined spaces, minimizing assembly time.
• Optimized Thread Design: M20x2.5 coarse right-hand threads with Class 5g6g fit ensure quick engagement and strong holding power, ideal for vibration-prone applications.
• Versatile Partial Threading: 52mm minimum thread length on a 120mm shank provides a firm grip where needed while allowing smooth alignment in non-threaded sections.
• Industry-Standard Compliance: Manufactured to DIN 912/ISO 4762 specifications, guaranteeing dimensional accuracy and interchangeability with existing metric fastener systems.
• Environmental & Regulatory Safety: RoHS 3 and REACH compliance ensures the screw is free from hazardous substances, meeting global environmental standards for industrial use.

Professional Applications & Engineering Value

This M20 socket head cap screw is engineered for high-stress industrial applications where reliability is non-negotiable. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, provides exceptional resistance to shear and tensile forces, making it ideal for heavy machinery, automotive assemblies, and structural frameworks. The partially threaded design concentrates clamping force precisely where needed, reducing the risk of thread stripping in soft materials. With a 17mm hex drive, it allows for secure tightening even in limited-access areas, streamlining maintenance and reducing downtime. Fully compliant with DIN 912/ISO 4762, this fastener ensures seamless integration into global engineering projects, delivering consistent performance and long-term durability.

Specification Summary & Compliance

This socket head cap screw features M20x2.5 coarse metric threads with a Class 5g6g thread fit for standard tolerance applications. The partially threaded rod has a minimum thread length of 52mm on a total length of 120mm. It conforms to DIN 912 / ISO 4762 dimensional standards and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to international environmental and safety regulations.