S-98892A131 1/4"-20 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted top-lock threads that maintain secure fastening under dynamic loads
• Enhanced anti-rotation performance with serrated flange design that bites into mating surfaces, eliminating loosening
• Excellent corrosion resistance provided by 18-8 stainless steel construction for long-term durability in harsh environments
• Quick installation and removal with standard external hex drive compatible with common wrench tools
• Reliable thread engagement ensured by Class 2B thread fit for consistent performance in industrial assemblies
• Eliminates need for separate washers with integrated flange that distributes load and protects surfaces
• Compliance with environmental regulations including REACH and RoHS 3 for global industrial applications

Professional Applications & Engineering Value

This 1/4"-20 flange lock nut delivers exceptional engineering value through its dual locking mechanism combining distorted thread technology with a serrated flange design. The 18-8 stainless steel construction provides superior corrosion resistance for demanding environments including outdoor equipment, marine applications, and chemical processing facilities. The UNC coarse thread pattern ensures rapid installation while maintaining strength, making it ideal for high-volume assembly operations. The integrated flange with serrations creates micro-bites into mating surfaces, preventing rotational movement even under extreme vibration conditions common in automotive, machinery, and structural applications. This combination of features eliminates the need for additional locking components, reducing assembly time and total fastening costs while providing reliable, maintenance-free performance.

Specification Summary & Compliance

This flange lock nut features 1/4"-20 UNC coarse threads with Class 2B thread fit for consistent engagement and reliable performance. The external hex drive measures 7/16" across flats with a 15/64" height, while the integrated flange provides a 0.594" diameter bearing surface with 0.04" thickness. Manufactured from 18-8 stainless steel with right-hand thread orientation and top-lock distorted thread design. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring suitability for global industrial applications.