S-91280A104 M3 x 8 mm ISO 4017, DIN 933, ISO 898 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
- Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
- High tensile strength of 110,000 psi ensures reliable performance under heavy loads and vibration
- Class 8.8 strength grade provides excellent durability for critical mechanical assemblies
- Coarse 0.5mm pitch threading enables faster installation and reduced cross-threading risks
- Precision Class 6h thread fit guarantees consistent engagement and secure fastening
- Fully threaded design offers maximum grip length and uniform load distribution
- External hex drive compatibility allows for standard tooling and efficient torque application
Professional Applications & Engineering Value
These M3 hex head screws deliver exceptional engineering value across industrial applications where vibration resistance and structural integrity are paramount. The Class 8.8 steel construction combined with Rockwell C21 hardness provides optimal strength-to-weight ratio for machinery, automotive components, and electrical enclosures. The coarse metric thread with 0.5mm pitch ensures rapid assembly in production environments while maintaining secure fastening in high-vibration settings. Zinc plating offers essential corrosion protection for outdoor equipment and manufacturing facilities, while the fully threaded design maximizes connection stability in varied material thicknesses. These industrial fasteners solve common challenges of loosening under dynamic loads while maintaining compliance with international quality standards.
Specification Summary & Compliance
Manufactured to ISO 4017 and DIN 933 specifications with Class 6h thread fit tolerance for precision engagement. The metric coarse thread (M3 x 0.5mm) follows standardized dimensions for compatibility across global applications. These hex head screws comply with ISO 898 mechanical properties requirements and meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in restricted substance-sensitive applications.
