S-95030A130 5/16"-18 Locknuts

Key Features & Benefits at a Glance

• Secure cotter pin locking prevents loosening under vibration and heavy loads, ensuring reliable performance in demanding applications
• Zinc-plated steel construction provides excellent corrosion resistance for extended service life in harsh industrial environments
• Class 2B thread fit offers optimal balance between easy assembly and secure fastening for maintenance and production applications
• 5/16"-18 UNC coarse threads enable quick installation and removal while maintaining strong holding power
• Standard hex profile allows for conventional tool compatibility and straightforward installation procedures
• REACH and RoHS 3 compliance ensures environmental responsibility and meets international regulatory standards
• Precisely sized slots (0.078" min. depth, 0.09" min. width) accommodate standard 5/64" cotter pins for fail-safe locking

Professional Applications & Engineering Value

This castle locknut delivers critical safety in applications where vibration-induced loosening could cause catastrophic failure. The zinc-plated steel construction withstands environmental exposure while the cotter pin locking mechanism provides positive mechanical security that surpasses friction-based alternatives. Engineered with 5/16"-18 UNC coarse threads and Class 2B fit, it ensures reliable performance in automotive steering systems, industrial machinery, agricultural equipment, and construction applications. The external hex drive facilitates installation in confined spaces, making it ideal for maintenance operations and production assembly lines where vibration resistance is paramount.

Specification Summary & Compliance

This heavy-duty castle locknut features 5/16"-18 UNC coarse threads with Class 2B thread fit per ASME standards, ensuring dimensional accuracy and proper engagement. The nut measures 1/2" across flats with 17/64" height, designed to accommodate standard 5/64" cotter pins with minimum slot dimensions of 0.078" depth and 0.09" width. Manufactured from zinc-plated steel for corrosion protection, this component is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, making it suitable for global industrial applications requiring verified material safety.