S-92820A425 M8 x 20 mm High-Strength Metric Steel Serrated-Flange Hex Head Screws
High-Strength Metric Steel Serrated-Flange 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 corrosion resistance with black-oxide steel coating for longer service life in harsh industrial environments
- Superior locking capability through serrations that prevent loosening under vibration and dynamic loads
- High tensile strength of 130,000 psi ensures reliable performance in demanding mechanical applications
- Flanged design with 18.2mm diameter provides wider bearing surface for better load distribution and reduced surface damage
- Precision Class 6g thread fit guarantees consistent engagement and smooth assembly in metric applications
- External hex drive with 13mm head width enables high-torque installation using standard tools
- Full threading along 20mm length offers maximum grip and adjustment flexibility in various material thicknesses
Professional Applications & Engineering Value
These M8 hex head screws with black-oxide steel construction address critical industrial fastening challenges where corrosion resistance and vibration resistance are paramount. The combination of Rockwell C27 hardness and 130,000 psi tensile strength makes them ideal for heavy machinery, automotive assemblies, and structural frameworks requiring reliable, long-term performance. The flanged design eliminates the need for separate washers while the coarse 1.25mm pitch metric thread ensures quick installation and superior holding power in various substrates. The serrated locking feature provides exceptional resistance to loosening in high-vibration environments, making these fully threaded screws essential for maintenance-critical applications across manufacturing and construction sectors.
Specification Summary & Compliance
Manufactured to precise metric dimensions with Class 6g thread fit tolerance for consistent performance in industrial applications. The right-hand coarse thread with 1.25mm pitch conforms to standard metric threading specifications. These hex head screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
