S-95030A360 1 1/4"-12 Locknuts

Key Features & Benefits at a Glance

• Maximum vibration resistance through secure cotter pin locking mechanism that prevents loosening under extreme conditions
• Enhanced corrosion protection with zinc plating that extends service life in demanding industrial environments
• Precise thread engagement with Class 2B fit ensuring reliable performance and consistent clamping force
• Superior torque transmission through standard external hex design for easy installation with common tools
• Optimized for safety-critical applications with fine thread spacing providing superior load distribution
• Compatible with standard 9/32" cotter pins for quick and secure locking in machinery and equipment
• Environmental compliance assurance meeting both RoHS 3 and REACH standards for industrial safety

Professional Applications & Engineering Value

This heavy-duty castle locknut with 1 1/4"-12 UNF fine thread configuration delivers exceptional reliability in high-vibration environments where safety is paramount. The zinc-plated steel construction provides durable corrosion resistance while maintaining the structural integrity needed for industrial machinery, agricultural equipment, and automotive applications. The cotter pin locking mechanism offers a fail-safe solution that prevents catastrophic nut loosening, making it ideal for rotating assemblies, axle systems, and critical structural connections. The external hex drive ensures straightforward installation and removal with standard wrenches, reducing maintenance time and labor costs while the fine thread spacing enhances load distribution across more thread contact points.

Specification Summary & Compliance

This castle locknut features 1 1/4"-12 UNF fine threads with Class 2B thread fit for precision engagement and reliable performance. The external hex drive measures 1 7/8" across flats with a total height of 1 1/16", designed to accommodate standard 9/32" cotter pins through slots measuring minimum 0.33" depth and 0.31" width. Manufactured from zinc-plated steel with right-hand thread direction, this component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in industrial applications worldwide.