S-91029A122 M12 x 50 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex 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 zinc yellow-chromate plating extends service life in harsh or outdoor industrial environments.
• High hardness rating (Rockwell C39) provides excellent wear resistance and durability under repetitive loads.
• Fully threaded design offers consistent clamping force along the entire length, ideal for applications requiring uniform pressure distribution.
• Precision Class 6h thread fit ensures smooth assembly and secure fastening, minimizing play and vibration loosening.
• External hex drive and hex head allow for easy installation with standard tools, speeding up assembly and maintenance processes.
• Compliance with ISO 4017/DIN 933 standards guarantees dimensional accuracy and interchangeability for global engineering projects.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this M12 hex head screw combines Class 12.9 high tensile strength with a metric coarse thread (1.75 mm pitch) to handle extreme mechanical stresses in machinery, construction, and automotive assemblies. The zinc yellow-chromate plating provides a robust barrier against corrosion, addressing common failure points in humid or chemically aggressive settings. Its fully threaded and right-hand thread design ensures maximum grip and load distribution, reducing the need for frequent retightening. By meeting ISO 4017/DIN 933 specifications, it delivers reliable performance in precision-critical environments, from manufacturing equipment to structural frameworks, enhancing operational safety and longevity.

Specification Summary & Compliance

This hex head screw features a metric M12 x 1.75 mm coarse thread with a Class 6h thread fit for precise tolerances, and a length of 50 mm. It complies with ISO 4017/DIN 933 manufacturing standards, ensuring consistent dimensions and mechanical properties. The steel material and zinc yellow-chromate finish align with industry requirements for durability and environmental resistance, supporting compliance with RoHS and REACH directives for safe use in various sectors.