S-90386A112 M8 x 40 mm DIN 6921 Medium-Strength Metric Class 8.8 Steel Serrated-Flange Hex Head Screws
Medium-Strength Metric Class 8.8 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 zinc-plated steel construction for extended service life in demanding environments
- Superior load-bearing capacity with Class 8.8 strength rating and 110,000 psi tensile strength for reliable performance under high stress
- Secure anti-loosening performance through serrated locking flange design that prevents rotation under vibration
- Efficient installation with external hex drive and coarse 1.25mm pitch threads for quick assembly and disassembly
- Optimized weight distribution with integrated 18mm flange that eliminates the need for separate washers
- Precise thread engagement with Class 6g tolerance ensuring consistent fit and reliable fastening
- Full thread coverage along the 40mm length provides maximum grip strength across the entire fastener
Professional Applications & Engineering Value
This M8 hex flange screw delivers exceptional engineering value through its zinc-plated steel construction and Class 8.8 strength grade, making it ideal for heavy-duty industrial applications where vibration resistance and structural integrity are critical. The integrated serrated locking flange provides superior anti-loosening performance in machinery, automotive assemblies, and structural frameworks exposed to dynamic loads. The coarse metric thread with 1.25mm pitch ensures rapid installation in production environments while maintaining Rockwell C22 hardness for durability. Fully compliant with DIN 6921 standards, this fastener solves common industrial challenges of joint integrity, corrosion protection, and assembly efficiency in manufacturing, construction, and equipment maintenance applications.
Specification Summary & Compliance
This metric hex flange screw features precise Class 6g thread fit tolerance with M8 x 1.25mm coarse threading and 40mm fully threaded length. Manufactured to DIN 6921 specifications with external hex drive and 18mm flange diameter. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors while meeting international quality standards for mechanical properties and dimensional accuracy.
