S-91029A117 M12 x 30 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in the most demanding industrial applications
• Superior corrosion resistance provided by zinc yellow-chromate plating extends service life in harsh environments
• Maximum thread engagement with fully threaded design delivers enhanced holding power and vibration resistance
• Precise Class 6h thread fit guarantees consistent installation and optimal clamping force distribution
• Heavy-duty Class 12.9 strength rating offers the highest grade of metric fastener performance available
• External hex drive design enables high-torque installation with standard tools for efficient assembly
• Rockwell C39 hardness provides excellent wear resistance and maintains thread integrity under repeated use

Professional Applications & Engineering Value

These M12 hex head screws with Class 12.9 strength rating are engineered to solve critical fastening challenges in heavy machinery, structural steel connections, and high-vibration equipment. The zinc yellow-chromate plating creates a protective barrier against corrosion in industrial environments, while the coarse thread pitch (1.75mm) ensures rapid installation and reduced cross-threading risks. The fully threaded metric screw design provides maximum shear strength along the entire length, making these industrial strength screws ideal for applications where joint integrity is paramount. Manufactured to ISO 4017/DIN 933 specifications, these fasteners deliver consistent dimensional accuracy and reliable performance in automotive, construction, and manufacturing applications requiring high tensile strength and durability.

Specification Summary & Compliance

This metric hex head screw features M12 x 1.75mm coarse thread with Class 6h thread fit tolerance, ensuring precise engagement and reliable performance. The fastener meets ISO 4017/DIN 933 specifications for dimensional accuracy and manufacturing quality. With a length of 30mm, head width of 19mm, and head height of 7.5mm, these screws provide standardized installation compatibility. The Class 12.9 strength grade represents the highest metric property class available, with verified 170,000 psi tensile strength and Rockwell C39 hardness. The zinc yellow-chromate plating offers superior corrosion protection while maintaining compliance with industrial standards for heavy-duty fastening applications.