S-95030A250 5/8"-18 Locknuts

Key Features & Benefits at a Glance

• Secure vibration-resistant locking through cotter pin mechanism prevents loosening in high-stress applications
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in industrial environments
• Precision fine threading (5/8"-18 UNF) ensures superior holding power and reliable fastening performance
• Standard external hex drive provides familiar installation with common tools and consistent torque application
• Optimized cotter pin compatibility with 5/32" diameter and deep slot design for positive locking engagement
• Industry compliance assurance meets REACH and RoHS 3 environmental standards for global manufacturing requirements
• Class 2B thread fit delivers reliable mating with male threads while maintaining easy assembly

Professional Applications & Engineering Value

This castle locknut with cotter pin locking mechanism provides critical safety in applications where vibration-induced loosening poses significant risks. The zinc-plated steel construction offers durable corrosion resistance for industrial machinery, automotive systems, and heavy equipment. The 5/8"-18 UNF fine thread configuration ensures superior clamping force distribution and maintains tension under dynamic loads. The external hex drive allows for standard wrench access in confined spaces, while the precisely machined slot accommodates standard 5/32" cotter pins for positive mechanical locking. This design eliminates the need for secondary locking devices, reducing assembly time and maintenance requirements in critical rotating assemblies, axle systems, and mechanical linkages where failure is not an option.

Specification Summary & Compliance

This castle locknut features Class 2B thread fit per UNF standards with 5/8"-18 fine thread spacing and right-hand thread direction. Dimensions include 15/16" width and 35/64" height with minimum slot depth of 0.195" and width of 0.18" for proper cotter pin engagement. The product is manufactured in compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring suitability for industrial applications with strict regulatory requirements.