S-91280A058 M5 x 40 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws
Medium-Strength Metric Class 8.8 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
- Enhanced load-bearing capacity with Class 8.8 strength grade and 110,000 psi tensile strength for reliable performance in demanding applications
- Superior wear resistance due to Rockwell C21 hardness, ensuring extended service life under mechanical stress
- Optimized thread engagement with M5 coarse threading (0.8 mm pitch) enabling quick assembly and reduced cross-threading risks
- Secure torque transmission via external hex drive design, compatible with standard tools for efficient installation
- Full-length threading provides consistent clamping force along the entire 40 mm length for uniform load distribution
- Regulatory compliance assurance with RoHS 3 and REACH standards, meeting international environmental and safety requirements
- Precision manufacturing to ISO 4017/DIN 933 specifications, guaranteeing dimensional accuracy and interchangeability
Professional Applications & Engineering Value
This M5 hex head screw delivers exceptional engineering value in industrial settings where vibration resistance and structural integrity are critical. The Class 8.8 steel construction maintains clamping force under dynamic loads, preventing joint failure in machinery, automotive assemblies, and construction frameworks. Its coarse metric thread excels in soft materials and high-vibration environments by resisting loosening, while the fully threaded design allows flexibility in material thickness variations. The black steel finish provides basic corrosion protection for indoor applications, making these hex head screws ideal for manufacturing equipment, conveyor systems, and structural steel connections where high-strength fastening is paramount.
Specification Summary & Compliance
Manufactured to ISO 4017/DIN 933 standards with Class 6g thread fit tolerance for precise engagement. The M5x0.8 mm coarse thread and 40 mm length maintain dimensional consistency across batches. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to hazardous substance restrictions. The external hex drive (8 mm width, 3.7 mm height) conforms to standard wrench sizes for uniform installation.
