S-97190A005 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated cotter pin locking mechanism, preventing loosening in high-stress applications
• Exceptional strength and durability with Grade 5 steel construction, suitable for heavy-duty industrial environments
• Enhanced corrosion protection from zinc plating, extending service life in demanding conditions
• Reliable coarse threading with UNC 1/4"-20 specification for quick installation and secure fastening
• Precision Class 2B thread fit ensuring consistent performance and easy assembly
• Standard external hex drive design for universal tool compatibility and straightforward installation
• Comprehensive safety compliance with RoHS 3 and REACH regulations for industrial applications

Professional Applications & Engineering Value

This Grade 5 castle locknut delivers critical engineering solutions for applications where vibration-induced loosening poses significant safety risks. The zinc-plated steel construction provides essential corrosion resistance while maintaining the high tensile strength required for automotive, machinery, and heavy equipment applications. The UNC coarse threading (1/4"-20) ensures rapid assembly and disassembly, while the cotter pin locking mechanism creates a permanent, vibration-proof connection that withstands extreme operational conditions. The external hex drive design offers universal tool compatibility, making it ideal for maintenance and assembly lines where reliability and speed are paramount. These features combine to create a secure fastening solution that prevents catastrophic failures in critical mechanical systems.

Specification Summary & Compliance

This castle locknut features precision Class 2B thread fit with UNC coarse threading (1/4"-20) and standard external hex drive (7/16" width). Manufactured from Grade 5 steel with zinc plating for corrosion protection, it accommodates 1/16" cotter pins with minimum slot dimensions of 0.072" depth and 0.07" width. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest industrial safety and environmental standards for professional applications.