S-97190A030 5/8"-11 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the reliable cotter pin locking mechanism that prevents loosening under dynamic loads
• Exceptional strength-to-weight ratio with Grade 5 steel construction capable of withstanding heavy-duty industrial applications
• Enhanced corrosion protection through zinc plating that extends service life in demanding environments
• Precision-engineered compatibility with 5/32" cotter pins for secure mechanical locking without special tools
• Optimized installation efficiency with standard external hex drive allowing for quick assembly using common wrenches
• Reliable thread engagement through Class 2B UNC coarse threads that resist cross-threading and ensure consistent performance
• Regulatory compliance assurance meeting both REACH and RoHS 3 standards for safe industrial use

Professional Applications & Engineering Value

This 5/8"-11 UNC castle locknut delivers critical safety in high-vibration environments where fastener integrity is paramount. The zinc-plated steel construction combined with Grade 5 strength classification provides exceptional durability against mechanical stress and environmental corrosion. The cotter pin locking design offers a fail-safe mechanical locking solution that prevents rotational loosening in automotive, agricultural, and heavy machinery applications. The coarse thread pitch ensures rapid installation while maintaining secure fastening, making it ideal for maintenance-critical assemblies where reliability cannot be compromised. This castle locknut solves the engineering challenge of maintaining joint integrity in dynamic load conditions through its proven mechanical locking mechanism.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit for consistent engagement and UNC coarse thread specification (5/8"-11). The nut features a standard hex profile (15/16" width) with external drive style and accommodates 5/32" cotter pins with minimum slot dimensions of 0.195" depth and 0.18" width. Fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental safety and industrial suitability. Right-hand thread direction with standard castle nut profile for universal application compatibility.