S-90605A131 M5 x 25 mm DIN 912, ISO 4762 Left-Hand Threaded Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide coating extends service life in harsh industrial environments.
• High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity over repeated use.
• Left-hand thread design offers secure fastening in applications where right-hand rotation could cause loosening.
• Precise Class 5g6g thread fit ensures smooth assembly and consistent clamping force in metric coarse thread systems.
• Partially threaded shank allows for focused grip on specific sections, minimizing stress concentration.
• Standard 4 mm hex drive enables easy installation with common tools, speeding up assembly processes.

Professional Applications & Engineering Value

This M5 left-hand socket head cap screw is engineered to address critical challenges in heavy-duty machinery, automotive, and precision equipment. The Class 12.9 alloy steel construction delivers unmatched strength-to-weight ratio, preventing stripping and shear under extreme loads. Its black-oxide surface treatment combats rust and oxidation in humid or corrosive settings, ensuring long-term reliability. The coarse 0.8 mm pitch thread facilitates quick engagement and disassembly, while the left-hand thread direction is ideal for counter-rotational mechanisms, securing components that experience reverse torque. Fully compliant with DIN 912/ISO 4762 standards, it guarantees dimensional accuracy and interoperability in global engineering projects.

Specification Summary & Compliance

This screw adheres to Class 5g6g thread tolerance for precise fit, with a partially threaded rod design and 25 mm length. It meets DIN 912 (ISO 4762) specifications for socket head cap screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible manufacturing and use in regulated industries.