S-95030A140 5/16"-24 Locknuts

Key Features & Benefits at a Glance

• Secure Vibration Resistance - Cotter pin locking mechanism prevents loosening under extreme vibration and dynamic loads
• Enhanced Corrosion Protection - Zinc-plated steel construction provides durable surface protection against rust and environmental degradation
• Precision Thread Engagement - UNF fine threads (5/16"-24) with Class 2B fit ensure smooth installation and reliable fastening performance
• Quick Visual Safety Verification - Cotter pin slot allows for immediate inspection of proper locking mechanism engagement
• Standard Tool Compatibility - External hex drive (1/2" width) enables easy installation with common wrenches and sockets
• Optimized Pin Retention - Specifically designed for 5/64" cotter pins with minimum slot depth of 0.078" for secure pin placement
• Regulatory Compliance Assurance - Meets REACH and RoHS 3 environmental standards for safe industrial use

Professional Applications & Engineering Value

This zinc-plated steel locknut with cotter pin slot delivers critical safety in high-vibration environments where fastener failure is not an option. The UNF fine thread configuration (5/16"-24) provides superior resistance to vibrational loosening compared to coarse threads, while the Class 2B thread fit ensures consistent engagement without binding. The external hex drive allows for high torque application using standard tools, making it ideal for industrial machinery, automotive suspensions, agricultural equipment, and construction applications. The integrated slot accommodates standard 5/64" cotter pins, creating a positive mechanical lock that exceeds the reliability of friction-based locking nuts. This engineering solution addresses the critical need for vibration-resistant fastening in safety-critical assemblies where mechanical locking is mandated by design specifications.

Specification Summary & Compliance

This locknut features 5/16"-24 UNF fine threads with Class 2B thread fit per Unified Thread Standard specifications. The external hex measures 1/2" across flats with a height of 17/64". The cotter pin slot accommodates 5/64" diameter pins with minimum slot dimensions of 0.078" depth and 0.09" width. Manufactured from zinc-plated steel for corrosion resistance, this component is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring safe use across various industrial sectors.