S-95030A180 7/16"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through cotter pin locking mechanism, preventing loosening in high-stress applications
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in harsh environments
• Precise thread engagement with Class 2B fine UNF threads ensuring reliable, consistent fastening performance
• Quick installation and removal using standard wrench tools thanks to the external hex drive design
• Secure mechanical locking with 3/32" cotter pin compatibility for critical safety applications
• Industry-standard compliance meeting both RoHS 3 and REACH environmental regulations
• Optimized slot dimensions (0.155" depth, 0.12" width) for reliable cotter pin retention

Professional Applications & Engineering Value

This 7/16"-20 UNF castle locknut delivers critical safety and reliability in demanding industrial environments where vibration-induced loosening poses significant risks. The zinc-plated steel construction provides essential corrosion resistance while maintaining high tensile strength, making it ideal for automotive, machinery, and structural applications. The cotter pin locking mechanism offers permanent mechanical security that surpasses friction-based alternatives, particularly valuable in rotating assemblies, axle systems, and safety-critical connections. The fine UNF threads and Class 2B fit ensure precise engagement with mating components, reducing the risk of cross-threading while providing consistent clamping force. Engineered for heavy-duty use, this external hex castle nut combines traditional reliability with modern compliance standards.

Specification Summary & Compliance

This castle locknut features 7/16"-20 UNF fine threads with Class 2B thread fit for precise tolerance and right-hand thread direction. The external hex drive measures 11/16" across flats with a 3/8" height profile. Designed for use with 3/32" diameter cotter pins, the slot provides 0.155" minimum depth and 0.12" minimum width for secure retention. Manufactured from zinc-plated steel, the nut complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring regulatory compliance for industrial and commercial applications.