S-91280A230 M5 x 20 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 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 industrial and construction applications
- Coarse 0.8mm thread pitch 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 with 8mm head allows for high-torque application with standard tools
Professional Applications & Engineering Value
These M5 hex head screws deliver exceptional engineering value in industrial applications where vibration resistance and structural integrity are critical. The Class 8.8 steel construction combined with Rockwell C21 hardness provides optimal strength-to-weight ratio, preventing shear failure in machinery assembly, automotive components, and structural frameworks. The coarse metric thread with 0.8mm pitch ensures rapid installation in production environments while maintaining secure fastening in materials prone to thermal expansion. Zinc plating offers essential corrosion protection for outdoor equipment, electrical enclosures, and manufacturing facilities exposed to moisture and chemicals. The fully threaded design maximizes contact surface area, distributing stress evenly to prevent loosening under dynamic loads.
Specification Summary & Compliance
Manufactured to ISO 4017/DIN 933 standards with Class 6h thread fit precision and metric coarse threading. These screws maintain dimensional accuracy per international specifications and comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The Class 8.8 strength rating conforms to ISO 898 mechanical property requirements, ensuring consistent performance across industrial applications.
