S-91853A035 5/8"-11 Locknuts

Key Features & Benefits at a Glance

• Maximum vibration resistance through cotter pin locking mechanism that prevents loosening in high-stress environments
• Superior corrosion protection with 18-8 stainless steel construction for extended service life in harsh conditions
• Optimal torque transmission via external hex drive design allowing for secure installation with standard tools
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
• Enhanced safety compliance meeting both REACH and RoHS 3 environmental standards for industrial applications
• Precision slot dimensions (0.21" depth, 0.18" width) accommodating standard 5/32" cotter pins for secure locking
• Industry-standard compatibility with 5/8"-11 UNC coarse threads for seamless integration into existing systems

Professional Applications & Engineering Value

This heavy-duty stainless steel locknut addresses critical safety concerns in high-vibration industrial environments where conventional fasteners frequently fail. The cotter pin locking mechanism provides permanent security by physically preventing rotation, making it ideal for machinery, automotive, and construction applications subject to dynamic loads. Manufactured from 18-8 stainless steel, the nut delivers exceptional corrosion resistance while maintaining structural integrity. The external hex drive enables high-torque installation without compromising the locking features, and the UNC coarse threads ensure rapid assembly in demanding field conditions. This combination of vibration-resistant design and durable material construction significantly reduces maintenance frequency and prevents catastrophic equipment failure.

Specification Summary & Compliance

This locknut features 5/8"-11 UNC coarse threads with Class 2B thread fit for precise dimensional accuracy and reliable performance. The right-hand thread direction follows industry standards, while the 15/16" width and 23/32" height provide optimal proportions for standard applications. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring safe usage across various industrial sectors. The cotter pin slot is engineered to accommodate 5/32" diameter pins with minimum slot dimensions of 0.21" depth and 0.18" width for secure locking performance.