S-91343A202 5/16"-24 Flange Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life
• Reliable vibration resistance provided by serrated locking teeth that prevent loosening under dynamic loads
• Integrated flange design eliminates the need for separate washers, distributing load evenly and speeding up assembly
• Precision UNF fine threading ensures tight, secure fits and superior holding power in critical applications
• External hex drive allows for easy installation and removal with standard tools, reducing maintenance time
• Class 2B thread fit guarantees consistent performance and compatibility with standard UNF threaded components
• Compliance with REACH and RoHS 3 ensures environmental safety and meets stringent industrial regulatory standards

Professional Applications & Engineering Value

This 316 stainless steel flange locknut is engineered to address common industrial challenges such as vibration-induced loosening and corrosive degradation. The serrated locking mechanism bites into mating surfaces, creating a permanent lock that maintains clamp force in high-vibration environments like machinery, automotive, and marine systems. Its UNF fine thread design offers superior resistance to back-off compared to coarse threads, while the integrated flange provides a larger bearing surface that reduces surface pressure and prevents damage to soft materials. Made from 316 stainless steel, it delivers exceptional performance in chemically aggressive or saltwater exposures, making it ideal for offshore equipment, chemical processing plants, and food-grade applications where reliability and compliance are non-negotiable.

Specification Summary & Compliance

This flange locknut features a 5/16"-24 UNF fine thread with Class 2B fit for precise engagement and consistent torque performance. The flange measures 11/16" in diameter with 0.13" thickness, and the external hex drive width is 1/2". It is manufactured in compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) standards, ensuring adherence to environmental and safety regulations for industrial components.