S-90636A125 5/8"-11 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through center lock distorted thread design that maintains clamp force in high-stress environments
• Exceptional strength and durability with Grade 8 classification, suitable for heavy-duty industrial applications
• Enhanced corrosion protection with zinc-flake coating that provides superior resistance to harsh environmental conditions
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy installation
• Optimized for industrial use with UNC coarse thread pattern that resists loosening under dynamic loads
• Secure locking performance through distorted thread technology that eliminates the need for additional locking devices
• Compliance assurance meeting both REACH and RoHS 3 environmental standards for global industrial applications

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut with center lock distorted thread technology addresses critical vibration-induced loosening challenges in industrial machinery, construction equipment, and automotive assemblies. The zinc-flake-coated steel construction provides exceptional corrosion resistance while maintaining the high tensile strength required for structural applications. The 5/8"-11 UNC coarse thread pattern combined with the distorted thread locking mechanism creates permanent resistance to rotational forces, eliminating the need for secondary locking methods. Engineered for external hex drive compatibility, this locknut delivers reliable performance in high-vibration environments where fastener integrity is critical to operational safety and equipment longevity.

Specification Summary & Compliance

This locknut features Class 2B thread fit tolerance with 5/8"-11 UNC coarse thread specification and right-hand thread direction. The fastener complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring regulatory compliance for industrial applications. Manufactured to Grade 8 strength classification with dimensions of 15/16" width and 35/64" height, this center lock distorted thread locknut maintains precision engineering standards for reliable performance in demanding conditions.