S-90636A122 5/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through center lock distorted thread technology that maintains secure fastening under extreme conditions
• Exceptional corrosion protection with zinc-flake coating that provides long-lasting performance in harsh industrial environments
• Heavy-duty reliability with Grade 8 steel construction offering high tensile strength for demanding applications
• Quick installation and removal with UNC coarse threading that reduces cross-threading risks and speeds assembly
• Precise thread engagement with Class 2B thread fit ensuring consistent performance and compatibility with standard bolts
• Secure external hex drive allowing for high torque application with standard wrench tools
• Environmental compliance meeting both REACH and RoHS 3 standards for safe industrial use

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, automotive assemblies, and construction equipment. The zinc-flake coating provides superior corrosion resistance, extending service life in demanding environments where moisture and chemicals are present. The UNC coarse threading ensures reliable engagement and disengagement, reducing installation time while maintaining structural integrity. Engineered for heavy-duty applications, this external hex locknut delivers consistent performance in high-stress scenarios where vibration resistance and long-term reliability are paramount. The combination of distorted thread locking mechanism and premium steel construction makes it ideal for critical fastening applications across multiple industrial sectors.

Specification Summary & Compliance

This locknut features 5/16"-18 UNC coarse threading with Class 2B thread fit for precise dimensional accuracy and compatibility. Manufactured from Grade 8 steel with zinc-flake coating for enhanced durability. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring safe use in industrial applications. The center lock distorted thread design follows industry-standard locking mechanisms for reliable vibration resistance.