S-95327A569 M8 x 40 mm ISO 4014, DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 strength grade and 150,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh industrial environments
• Optimized clamping force distribution with partial threading design that prevents joint loosening under vibration and dynamic loads
• Precise metric coarse threading (M8 x 1.25mm) enables quick installation and secure fastening in various materials
• Enhanced torque transmission via external hex drive and 13mm head width for efficient assembly with standard tools
• Consistent dimensional accuracy maintained through Class 6h thread fit tolerance for reliable mating with nuts and threaded holes
• Certified quality assurance meeting ISO 4014/DIN 931 specifications for guaranteed interchangeability and performance

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these M8 hex head screws deliver exceptional performance where vibration resistance and structural integrity are critical. The Class 10.9 steel construction with Rockwell C32 hardness provides the necessary strength for machinery, equipment frames, and structural assemblies subjected to high stress loads. The zinc yellow-chromate plating offers superior corrosion protection, making these metric coarse thread fasteners ideal for outdoor equipment, automotive components, and manufacturing environments where exposure to moisture and chemicals is common. The partially threaded design ensures optimal clamping force concentration at the joint interface, preventing material deformation while maintaining secure connections in dynamic loading conditions common in construction, industrial machinery, and transportation equipment.

Specification Summary & Compliance

This M8 x 1.25 x 40mm hex head screw features precise Class 6h thread fit tolerance with metric coarse threading and partial threading up to 22mm minimum thread length. Manufactured to ISO 4014/DIN 931 specifications with external hex drive (13mm width, 5.3mm height) for standardized tool compatibility. The fastener meets international quality standards with material certification for Class 10.9 strength grade and complies with RoHS and REACH environmental regulations for industrial use.