S-97190A170 5/8"-18 Locknuts

Key Features & Benefits at a Glance

• Secure vibration-resistant locking through cotter pin retention mechanism prevents loosening in high-vibration environments
• Heavy-duty Grade 5 strength provides reliable performance under substantial mechanical loads and stress
• Corrosion-resistant zinc plating extends service life and maintains integrity in demanding industrial conditions
• Precision UNF fine threading with Class 2B fit ensures smooth installation and secure fastening alignment
• Standard hex profile design allows for easy installation using common wrench tools
• Optimized slot dimensions (0.195" depth, 0.18" width) accommodate standard 5/32" cotter pins for reliable locking
• Environmental compliance assurance with RoHS 3 and REACH regulations for safe industrial use

Professional Applications & Engineering Value

This Grade 5 castle locknut with cotter pin locking mechanism addresses critical safety concerns in high-vibration applications where conventional fasteners may fail. The zinc-plated steel construction combined with UNF fine threading provides superior resistance to shock loads and mechanical stress, making it ideal for automotive, agricultural machinery, and industrial equipment applications. The castle nut design with precisely machined slots ensures positive locking when paired with cotter pins, preventing catastrophic fastener failure in critical assemblies. This heavy-duty locknut maintains its clamping force even under extreme vibration conditions, reducing maintenance frequency and enhancing operational safety in demanding environments.

Specification Summary & Compliance

This castle locknut features 5/8"-18 UNF fine threading with Class 2B thread fit for precise engagement, manufactured to Grade 5 strength standards. The external hex drive with standard profile measures 15/16" across flats and 35/64" in height, designed for 5/32" cotter pin diameter with minimum slot depth of 0.195" and width of 0.18". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial applications.