S-90640A420 1 1/2"-6 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology that maintains secure fastening in dynamic applications
• Enhanced corrosion protection with zinc plating that extends service life in demanding industrial environments
• High-temperature performance with nylon insert rated to 220°F (104°C) for reliable operation in heated applications
• Heavy-duty strength from Grade 5 steel construction that withstands substantial mechanical loads and stress
• Quick installation efficiency with UNC coarse threading and external hex drive for rapid assembly with standard tools
• Precise thread engagement through Class 2B fit that ensures consistent performance and reduces cross-threading risks
• Regulatory compliance assurance meeting REACH and RoHS 3 standards for safe, environmentally responsible manufacturing

Professional Applications & Engineering Value

This heavy-duty nylon insert locknut delivers critical vibration resistance where conventional fasteners fail. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, machinery, and structural applications exposed to environmental elements. Engineered with UNC coarse threading and Class 2B thread fit, this locknut ensures reliable performance in high-vibration environments like automotive assemblies, industrial machinery, and construction equipment. The nylon insert creates consistent locking force without damaging threads, making it ideal for applications requiring repeated disassembly and reassembly. With its 220°F temperature rating and external hex drive for standard tool compatibility, this fastener solves critical loosening problems while maintaining installation efficiency in production environments.

Specification Summary & Compliance

This locknut features 1 1/2"-6 UNC coarse threading with Class 2B thread fit for precise dimensional accuracy. Manufactured from Grade 5 steel with zinc plating for corrosion resistance, it meets industry standards for heavy-duty applications. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental responsibility and workplace safety. Dimensions include 2 13/64" width and 1 39/64" height for standardized installation requirements.