S-90373A104 M8 x 30 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Class 12.9 steel construction, delivering 170,000 psi tensile strength for critical structural applications
• Superior wear resistance from Rockwell C39 hardness, ensuring long service life in high-vibration environments
• Optimized installation efficiency through external hex drive design and fully threaded configuration for faster assembly
• Reliable thread engagement with Class 6g fit and coarse 1.25mm pitch, preventing cross-threading in industrial settings
• Enhanced corrosion protection through compliant steel material meeting stringent RoHS 3 and REACH regulations
• Global compatibility with DIN 933/ISO 4017 standards, ensuring interchangeability across international projects
• Secure fastening performance from right-hand metric threading, maintaining joint integrity under dynamic loads

Professional Applications & Engineering Value

These M8 hex head screws deliver exceptional engineering value in heavy-duty industrial applications where failure is not an option. The Class 12.9 steel construction provides superior resistance to shock loads and fatigue, making them ideal for machinery frames, construction equipment, and automotive assemblies. The fully threaded design ensures maximum grip length and load distribution, while the external hex drive allows for high-torque installation without stripping. With metric coarse threading and Class 6g fit, these fasteners maintain precise alignment in high-vibration environments, solving common issues of loosening and thread damage. Their compliance with international standards makes them suitable for global supply chains and regulated industries requiring documented material traceability.

Specification Summary & Compliance

This M8 x 1.25 x 30mm hex head screw features precision Class 6g thread fit with right-hand metric coarse threading. Manufactured to ISO 4017 and DIN 933 specifications, ensuring dimensional accuracy and interchangeability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety. The Class 12.9 rating confirms the highest grade of metric steel fasteners with verified mechanical properties including 170,000 psi tensile strength and Rockwell C39 hardness.