S-98093A777 M12 x 80 mm ASME B18.2.3.9M, SAE J1199 High-Strength Metric Class 10.9 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 strength rating and 150,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through black-phosphate steel construction that protects against rust and extends service life
• Enhanced stability and load distribution thanks to the integrated flange design that eliminates the need for separate washers
• Optimized thread engagement with coarse M12x1.75mm threading and Class 6g fit for faster installation and secure fastening
• Easy installation and removal with standard external hex drive and 18mm head width for common tool compatibility
• Partial threading design provides unthreaded shank section for precise clamping force and improved shear strength
• Regulatory compliance assurance meeting ASME, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

This M12 hex head screw delivers critical engineering solutions for heavy-duty industrial applications where vibration resistance and structural integrity are paramount. The Class 10.9 strength grade combined with Rockwell C32 hardness ensures reliable performance in high-stress environments, from machinery assembly to structural steel connections. The black-phosphate steel surface treatment provides essential corrosion protection in challenging conditions, while the flanged design distributes clamping force evenly, preventing surface damage and maintaining joint integrity. The partially threaded configuration with coarse metric threading offers superior resistance to loosening under dynamic loads, making these industrial fasteners ideal for automotive, construction, and manufacturing applications requiring durable, vibration-resistant connections.

Specification Summary & Compliance

This metric hex head screw features precise Class 6g thread fit tolerance with M12x1.75mm coarse threading and 30mm minimum thread length. The fastener maintains strict compliance with ASME B18.2.3.9M manufacturing specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Critical dimensions include 80mm total length, 18mm head width, 11.8mm head height, and 26.6mm flange diameter, ensuring consistent performance and interchangeability in industrial applications.