S-90997A750 1/4"-28 Flange Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with A286 stainless steel construction for extended service life in harsh environments
• Enhanced load distribution through the 7/16" flange diameter, reducing surface pressure and preventing material damage
• Precision thread engagement with Class 3B fit ensuring reliable, vibration-resistant connections in critical assemblies
• Optimal torque transmission via the external 12-point drive design, enabling secure installation with standard tools
• Excellent vibration resistance from the fine UNF thread spacing (28 TPI), maintaining clamp load under dynamic conditions
• Reduced assembly components as the integrated flange eliminates the need for separate washers, saving time and cost
• Wide temperature compatibility due to A286 material properties, performing reliably in high-heat applications

Professional Applications & Engineering Value

This A286 stainless steel flange nut delivers exceptional engineering value in demanding industrial applications where reliability is non-negotiable. The combination of Class 3B thread fit and fine UNF threading provides superior resistance to vibration loosening in automotive, aerospace, and heavy machinery assemblies. The external 12-point drive enables high-torque installation without rounding, while the integrated 7/16" flange distributes clamping force evenly, preventing surface damage to sensitive materials. Manufactured from premium A286 stainless steel, this flange nut maintains mechanical properties at elevated temperatures, making it ideal for engine components, exhaust systems, and industrial equipment subjected to thermal cycling and corrosive environments.

Specification Summary & Compliance

This precision flange nut features 1/4"-28 UNF fine threads with Class 3B thread fit for superior dimensional accuracy. The standard hex nut profile with external 12-point drive ensures compatibility with common installation tools. Manufactured to UNF thread standards with right-hand thread direction. The component meets industry standards for high-performance fasteners and complies with RoHS and REACH environmental directives.