S-91280A527 M8 x 18 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
• High tensile strength of 110,000 psi ensures reliable performance under heavy loads and vibration
• Class 8.8 strength grade provides excellent mechanical properties for demanding applications
• Coarse M8 x 1.25mm thread enables faster assembly and better resistance to loosening
• Fully threaded design offers maximum grip length and uniform stress distribution
• External hex head allows for easy installation with standard tools and high torque application
• Rockwell C21 hardness maintains thread integrity and prevents stripping during repeated use

Professional Applications & Engineering Value

This M8 hex head screw delivers exceptional engineering value across industrial sectors where reliability is non-negotiable. The Class 8.8 steel construction combined with zinc plating addresses common failure points in automotive, construction, and heavy machinery applications by providing superior corrosion resistance while maintaining high tensile strength. The fully threaded metric design with coarse 1.25mm pitch ensures rapid installation and secure fastening in materials prone to vibration-induced loosening. Engineered to ISO 4017 standards (equivalent to DIN 933), these external hex drive screws offer consistent performance in assembly lines, structural frameworks, and equipment maintenance where precise thread fit Class 6h guarantees proper engagement without cross-threading risks.

Specification Summary & Compliance

This fastener features precise M8 x 1.25mm coarse threads with Class 6h thread fit tolerance, manufactured to ISO 4017 specifications (DIN 933 equivalent). The 18mm length and fully threaded configuration ensure consistent performance across applications. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted substances. The Class 8.8 strength rating with 110,000 psi tensile strength and Rockwell C21 hardness validates its suitability for heavy-duty industrial fastening requirements.