S-90759A900 M12 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution with 20.9mm flange diameter and 3.2mm thickness to prevent surface damage and maintain joint integrity under high stress
• Superior torque application through 12-point external drive design, allowing precise tightening in confined spaces with standard tools
• Exceptional corrosion resistance thanks to black-oxide steel construction, ideal for harsh industrial environments and automotive underbody applications
• Reliable thread engagement with Class 5H thread fit and fine 1.25mm pitch, ensuring vibration resistance and consistent clamping force
• Reduced assembly time with metric M12 sizing and right-hand threading, compatible with global equipment standards and replacement parts
• Durability in heavy-duty applications through hardened steel material, capable of withstanding extreme mechanical loads without deformation

Professional Applications & Engineering Value

This M12x1.25 flange nut delivers critical performance where vibration resistance and uniform load distribution are paramount. The black-oxide steel construction provides a protective barrier against rust and chemical exposure, extending service life in automotive chassis systems, machinery frames, and industrial equipment subjected to dynamic stresses. Its 12-point external drive enables high-torque installation without rounding, while the integrated flange eliminates the need for separate washers, streamlining assembly in production lines. The fine thread pitch and Class 5H thread fit maintain precise preload under thermal cycling, preventing loosening in critical joints—making it an engineered solution for OEM manufacturing and MRO applications demanding reliability.

Specification Summary & Compliance

Manufactured to metric standards with M12x1.25 fine thread and Class 5H thread fit tolerance, ensuring consistent interchangeability. The nut meets dimensional requirements with 14mm width, 12.8mm height, and 20.9mm flange diameter. Complies with international metric threading specifications and industrial fastener protocols. Material and finish adhere to RoHS and REACH environmental directives, suitable for regulated sectors requiring corrosion-resistant fasteners without hazardous substances.