S-97050A339 M20 x 40 mm DIN 6912 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi from Class 10.9 alloy steel ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by the black-oxide finish extends service life and maintains integrity in harsh industrial environments.
• Space-saving low-profile head design allows installation in confined areas where standard socket heads cannot fit, increasing design flexibility.
• Secure and precise driving with the 17 mm hex drive and pilot recess minimizes cam-out and tool slippage for efficient, damage-free assembly.
• Accurate and durable thread engagement with Class 6g fit and coarse M20x2.5 threads ensures easy alignment and robust connections in dynamic loads.
• Partial threading offers an unthreaded shank for precise clamping and shear resistance, ideal for machined components and structural assemblies.
• Compliance with DIN 6912 and RoHS 3 guarantees consistent quality, interchangeability, and environmental safety for global engineering projects.

Professional Applications & Engineering Value

This M20x2.5 Class 10.9 metric socket head cap screw is engineered to address critical challenges in heavy-duty machinery, automotive systems, and precision equipment. The black-oxide alloy steel construction, combined with a Rockwell C32 hardness, delivers outstanding wear resistance and durability under cyclic stresses, preventing premature wear in high-vibration settings. The low-profile socket head with a hex pilot recess ensures optimal torque transmission and access in tight spaces, reducing assembly time and tool wear. Its coarse thread design facilitates quick installation and robust holding power, making it ideal for applications requiring reliable fastening in structural frames, engine components, and industrial automation systems where precision and strength are paramount.

Specification Summary & Compliance

The screw features a metric thread with Class 6g tolerance for precise fit, a partially threaded rod with a minimum thread length of 26 mm, and dimensions including 40 mm length and 30 mm head diameter. It is manufactured in accordance with DIN 6912 specifications and is RoHS 3 (2015/863/EU) compliant, ensuring adherence to international standards for performance and environmental safety without hazardous substances.