S-91052A104 M8 x 40 mm ISO 8676, DIN 961 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with Class 10.9 rating (150,000 PSI) ensures reliable performance under high-stress conditions, reducing failure risks in critical assemblies.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh or outdoor industrial environments, minimizing maintenance needs.
• High hardness (Rockwell C32) provides excellent wear resistance, maintaining thread integrity and drive engagement during repeated installations.
• Fine thread pitch (1mm) offers improved clamping force and vibration resistance compared to coarse threads, ideal for precision equipment.
• Fully threaded design allows consistent grip along the entire 40mm length, enhancing load distribution and assembly flexibility.
• External hex drive with 13mm head enables easy installation and high torque application using standard tools, speeding up assembly processes.
• Compliance with ISO 8676/DIN 961 guarantees dimensional accuracy and interchangeability, ensuring seamless integration in global engineering projects.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this M8 hex head screw combines Class 10.9 high tensile strength and zinc yellow-chromate plating to address common challenges like joint loosening from vibrations and corrosion-induced degradation. The fully threaded metric fine thread (1mm pitch) ensures precise tension control and superior holding power in machinery, automotive frames, and structural steel connections. Its external hex drive facilitates quick installation with common wrenches, reducing labor time while the steel material and Rockwell C32 hardness withstand heavy loads and abrasive conditions. Ideal for OEM and MRO applications, it delivers long-term reliability in assembly lines, construction, and equipment manufacturing, meeting rigorous ISO 8676/DIN 961 specifications for consistent performance.

Specification Summary & Compliance

This fastener features M8 x 1mm fine threads with a Class 6h thread fit for precise engagement and 40mm length. It conforms to ISO 8676/DIN 961 standards, ensuring dimensional accuracy and interchangeability. The zinc yellow-chromate plating provides RoHS and REACH compliance for environmental safety, while the Class 10.9 strength grade aligns with international mechanical property requirements for high-stress applications.