S-91837A255 3/8"-24 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread top lock design that maintains secure fastening under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in industrial environments
• Precise thread engagement with UNF fine thread (3/8"-24) and Class 2B fit ensuring reliable performance in critical applications
• High-strength performance meeting Grade 2 specifications for dependable holding power in demanding conditions
• Easy installation and removal with standard external hex drive design compatible with common wrench tools
• Environmental compliance with REACH and RoHS 3 standards for safe use across various industries
• Optimal dimensional stability with 9/16" width and 21/64" height for consistent performance in assembly applications

Professional Applications & Engineering Value

This 3/8"-24 UNF locknut with distorted thread top lock technology provides engineered solutions for vibration-intensive environments where traditional fasteners fail. The zinc-plated steel construction offers excellent corrosion resistance while maintaining the mechanical properties required for Grade 2 strength classification. The UNF fine thread configuration ensures superior clamping force distribution and resistance to loosening under cyclic loading conditions. Ideal for automotive assemblies, industrial machinery, and equipment manufacturing, this external hex locknut delivers reliable performance in applications requiring repeated disassembly and reassembly while maintaining locking integrity through its top lock distorted thread design that creates consistent interference fit throughout the fastener's service life.

Specification Summary & Compliance

This locknut features 3/8"-24 UNF fine threads with Class 2B thread fit tolerance for precise engagement. The distorted thread top lock design provides consistent locking action while the external hex drive (9/16" width) ensures compatibility with standard tools. Manufactured from zinc-plated steel and rated Grade 2 for mechanical performance. Compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring regulatory compliance for industrial applications worldwide.