S-90997A330 M12 Flange Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with A286 stainless steel construction for long-lasting performance in harsh industrial environments
• Superior torque transmission through the 12-point external drive design, enabling secure fastening in high-vibration applications
• Enhanced load distribution from the integrated 20.9 mm flange, reducing surface pressure and preventing joint loosening
• Precision thread engagement with Class 5H fit and fine 1.25 mm pitch for reliable, vibration-resistant connections
• Optimized strength-to-weight ratio through compact 12.8 mm height and 14 mm width dimensions
• Reduced installation time with standard metric M12 sizing for compatibility with existing tooling and components
• Consistent performance across temperature variations thanks to A286 material's thermal stability

Professional Applications & Engineering Value

This M12 flange nut delivers critical engineering advantages in demanding applications where vibration resistance and corrosion protection are paramount. The A286 stainless steel composition provides exceptional strength retention at elevated temperatures while resisting chemical degradation, making it ideal for aerospace, automotive, and heavy machinery applications. The fine 1.25 mm pitch thread creates more contact points per unit length, significantly enhancing resistance to loosening under dynamic loads. Combined with the 12-point external drive configuration, this flange nut enables higher torque application in confined spaces while the integrated flange eliminates the need for separate washers, streamlining assembly processes. The Class 5H thread fit ensures precise engagement with mating components, reducing the risk of cross-threading and ensuring consistent clamp force distribution across the joint.

Specification Summary & Compliance

This precision metric flange nut features M12x1.25 fine thread spacing with Class 5H thread fit tolerance, ensuring compatibility with standard metric bolt systems. The external 12-point drive accommodates standard industrial tooling while the 20.9 mm flange diameter and 3.2 mm thickness provide optimal bearing surface. Manufactured in compliance with international metric standards and RoHS/REACH environmental directives, this component meets rigorous industrial requirements for quality and safety in critical applications.