S-93083A118 5/8"-18 Flange Nuts

Key Features & Benefits at a Glance

• Vibration-resistant locking with serrated teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Efficient installation through standard external hex drive design compatible with common wrench tools
• Enhanced load distribution with 1 9/32" flange diameter that reduces surface pressure and prevents material damage
• Corrosion-resistant black-oxide steel providing durable protection in demanding industrial environments
• Precision UNF fine threading (5/8"-18) ensuring secure fastening and superior vibration resistance
• Reliable thread engagement with Class 2B fit maintaining consistent clamping force in right-hand applications
• Regulatory compliance meeting RoHS 3 and REACH standards for safe use across various industries

Professional Applications & Engineering Value

This black-oxide steel flange locknut addresses critical vibration-induced failure points in heavy machinery, automotive assemblies, and structural frameworks. The serrated locking mechanism creates permanent resistance to rotational loosening, eliminating the need for secondary locking devices. Its integrated flange distributes clamp load over a wider area (1 9/32" diameter), protecting soft materials while providing built-in washer functionality. The UNF fine thread configuration (5/8"-18) offers tighter tolerances and superior holding power compared to coarse threads, making it ideal for high-vibration applications where thread integrity is paramount. Engineered for industrial durability, this nut maintains performance in demanding conditions while complying with international environmental standards.

Specification Summary & Compliance

This flange locknut features Class 2B thread fit per UNF standards, ensuring precise engagement with mating components. The 5/8"-18 fine thread maintains tight tolerances for vibration-resistant applications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming absence of restricted substances. The standard hex profile (15/16" width) and external drive style provide compatibility with conventional installation tools, while the right-hand thread direction follows industry-standard fastening conventions.