S-91280A234 M5 x 25 mm ISO 4017, DIN 933, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced Durability: Zinc plating provides superior corrosion resistance, extending service life in harsh industrial environments.
• High Tensile Strength: Class 8.8 steel construction with 110,000 psi tensile strength ensures reliable performance under heavy loads.
• Secure Fastening: External hex drive and hex head design allow for high torque application, preventing stripping and ensuring a tight fit.
• Easy Installation: Coarse thread pitch (0.8mm) and fully threaded right-hand design enable quick and straightforward assembly.
• Precision Fit: Class 6h thread fit guarantees consistent, accurate mating with nuts and threaded holes for secure connections.
• Material Hardness: Rockwell C21 hardness offers excellent wear resistance, maintaining fastener integrity over repeated use.
• Global Compliance: Meets ISO 4017/DIN 933 standards and is RoHS 3/REACH compliant, ensuring safety and regulatory acceptance worldwide.

Professional Applications & Engineering Value

This M5 hex head screw is engineered from Class 8.8 steel to address common industrial challenges such as vibration loosening and material fatigue. The fully threaded design with a coarse pitch ensures maximum grip and load distribution, making it ideal for heavy-duty applications in machinery, automotive assemblies, and construction frameworks. The zinc plating finish significantly enhances corrosion resistance, reducing maintenance costs in humid or outdoor settings. Its external hex drive allows for efficient installation with standard tools, streamlining assembly processes while maintaining high tensile strength and durability under stress. By adhering to ISO 4017 and DIN 933 standards, this fastener delivers consistent performance, minimizing downtime and ensuring long-term reliability in demanding environments.

Specification Summary & Compliance

This product features precise Class 6h thread fit per ISO metric standards, with dimensions including M5 thread size, 0.8mm pitch, and 25mm length. It complies with manufacturing specifications under ISO 4017 and DIN 933, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety. The Class 8.8 strength grade and Rockwell C21 hardness ensure adherence to performance benchmarks, providing reliable fastening solutions for industrial use.