S-90759A890 M12 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments
• Superior torque transmission through 12-point external drive design, preventing tool slippage during high-tightening applications
• Built-in washer functionality with 19.1mm flange diameter, eliminating need for separate washers and reducing assembly time
• Precision fine threading (1mm pitch) ensures tighter fit and better vibration resistance compared to coarse thread alternatives
• Reliable thread engagement with Class 5H fit, providing consistent clamping force and reducing loosening risks
• Standard metric profile ensures compatibility with existing M12 bolt systems and tooling
• Optimized load distribution through 3.2mm flange thickness, minimizing surface damage to connected materials

Professional Applications & Engineering Value

This M12 flange nut delivers critical engineering advantages where vibration resistance and corrosion protection are paramount. The black-oxide steel construction provides essential oxidation resistance for outdoor equipment, automotive assemblies, and machinery operating in humid conditions. The 12-point external drive design enables high-torque installation in confined spaces where socket clearance is limited, while the integrated flange eliminates washer inventory requirements. With fine metric threading maintaining tension under dynamic loads, this fastener solves common industrial challenges of joint relaxation and material galling. Particularly valuable for maintenance-critical applications where disassembly and reassembly cycles demand durable thread performance without degradation.

Specification Summary & Compliance

Manufactured to metric system standards with M12x1mm fine pitch threading and Class 5H thread fit tolerance. Features right-hand thread direction with standard hex nut profile. Flange dimensions precisely controlled at 19.1mm diameter and 3.2mm thickness. Complies with international metric thread specifications and industrial fastener requirements. Black-oxide surface treatment meets corrosion protection standards for industrial applications.