S-90373A121 M12 x 25 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws
Extreme-Strength Metric Class12.9 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Maximum load-bearing capacity with Class 12.9 steel construction, providing 170,000 PSI tensile strength for critical structural applications
- Superior wear resistance from Rockwell C39 hardness, ensuring extended service life in high-vibration environments
- Optimized installation efficiency through external hex drive design and 19mm head width for secure tool engagement
- Reliable thread engagement with Class 6g thread fit and coarse 1.75mm pitch, preventing cross-threading in industrial assemblies
- Full-length fastening capability with complete M12 threading along 25mm length for uniform stress distribution
- Global compliance assurance meeting ISO 4017/DIN 933 specifications for international project compatibility
- Environmental regulation adherence with RoHS 3 and REACH compliance for sustainable manufacturing operations
Professional Applications & Engineering Value
This high-strength metric hex head screw addresses critical challenges in heavy machinery, automotive manufacturing, and structural steel connections where vibration resistance and tensile strength are paramount. The Class 12.9 steel composition combined with Rockwell C39 hardness provides exceptional resistance to shear forces and fatigue failure in dynamic load conditions. The fully threaded M12 design with coarse 1.75mm pitch ensures rapid installation while maintaining Class 6g thread fit precision for consistent clamping force. The external hex drive configuration delivers reliable torque transmission during high-tension assembly operations, making these ISO 4017/DIN 933 compliant fasteners ideal for construction equipment, industrial presses, and renewable energy infrastructure where mechanical integrity cannot be compromised.
Specification Summary & Compliance
Manufactured to ISO 4017 / DIN 933 dimensional standards with Class 6g thread tolerance for precision fit. The metric coarse thread (M12 x 1.75mm) provides optimal engagement in steel and cast iron applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures unrestricted use in regulated industries. The 25mm length with fully threaded design maintains consistent mechanical properties throughout the fastener body.
