S-94036A841 M12 x 40 mm ISO 898-1, DIN 6921 Medium-Strength Metric Class 8.8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
• High tensile strength of 110,000 psi (Class 8.8) ensures reliable performance under heavy loads and vibration
• Integrated flange design eliminates the need for separate washers, simplifying installation and reducing assembly time
• Coarse metric threading (M12 x 1.75mm) provides faster installation and superior resistance to loosening in dynamic applications
• Precision Class 6g thread fit guarantees consistent engagement and optimal clamping force distribution
• Partially threaded shank allows for precise clamping on specific joint sections without thread interference
• External hex drive design enables high-torque installation with standard tools, preventing stripping and ensuring secure fastening

Professional Applications & Engineering Value

This M12 hex head flange screw delivers critical engineering solutions for heavy-duty industrial applications where vibration resistance and structural integrity are paramount. The Class 8.8 strength rating combined with zinc yellow-chromate plated steel construction addresses common failure points in machinery, automotive assemblies, and structural frameworks by providing superior corrosion protection and maintaining clamp load under extreme conditions. The integrated flange distributes pressure over a wider surface area (26.6mm diameter), preventing surface damage and compensating for misaligned holes. With metric coarse threading and partial threading design, it ensures rapid assembly in high-volume production while providing precise unthreaded shank sections for shear-critical connections.

Specification Summary & Compliance

Manufactured to ISO 898-1 and DIN 6921 specifications, this fastener maintains Class 6g thread tolerance for precision fit and consistent performance. The 40mm length with 30mm minimum thread length provides optimal engagement depth for standard applications. Compliant with international mechanical property standards for Class 8.8 strength grade, demonstrating Rockwell C22 hardness and verified tensile performance. Surface treatment meets industry standards for corrosion resistance in industrial environments.