S-91831A004 3-48 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking, preventing loosening in high-motion applications
• Excellent corrosion resistance with 18-8 stainless steel construction for long-term durability in harsh environments
• High-temperature performance maintaining locking integrity up to 220°F (104°C) for demanding industrial settings
• Reliable coarse threading with UNC profile for faster assembly and reduced cross-threading risk
• Precision Class 2B thread fit ensuring consistent engagement and optimal clamping force distribution
• Standard external hex drive for compatibility with common wrenching tools and efficient installation
• Environmental compliance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This 3-48 UNC nylon insert locknut delivers critical vibration-resistant fastening for machinery, automotive, and electrical assemblies where 18-8 stainless steel provides essential corrosion protection. The nylon insert locking mechanism creates consistent friction against bolt threads, eliminating the need for secondary locking devices while maintaining performance up to 220°F maximum temperature. With coarse UNC threading and Class 2B thread fit, this external hex locknut ensures rapid installation and reliable performance in high-vibration environments, reducing maintenance frequency and improving operational safety across industrial applications.

Specification Summary & Compliance

This locknut features 3-48 UNC coarse threading with Class 2B thread fit for precision engagement, 1/4" width across flats, and 9/64" height. Manufactured to industry standards for external hex drive locknuts with right-hand thread direction. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance for industrial fastener applications.