S-90636A089 1"-8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with center-lock distorted thread technology that maintains secure fastening under extreme conditions
• Exceptional corrosion protection through zinc yellow-chromate plating, extending service life in harsh industrial environments
• Heavy-duty load capacity with Grade 8 strength classification, ensuring reliable performance in high-stress applications
• Precise thread engagement with Class 2B thread fit, providing consistent installation and reducing cross-threading risks
• Easy installation and removal using standard external hex drive, compatible with common wrench tools
• Optimized for industrial assembly with UNC coarse threading that resists loosening better than fine threads in vibrating equipment
• Dimensional reliability with standardized 1"-8 thread size and 1-1/2" width, ensuring compatibility with existing components

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut delivers critical vibration resistance for industrial machinery, construction equipment, and automotive assemblies where secure fastening is paramount. The center-lock distorted thread technology creates controlled interference that prevents spontaneous loosening under continuous vibration and dynamic loads, eliminating the need for secondary locking devices. Manufactured from zinc yellow-chromate plated steel, it provides superior corrosion resistance in demanding environments while maintaining the high tensile strength required for structural applications. The UNC coarse threading with Class 2B fit ensures quick installation and reliable engagement, making it ideal for maintenance operations and production lines where efficiency and safety cannot be compromised.

Specification Summary & Compliance

This locknut features 1"-8 UNC coarse threading with Class 2B thread fit for precise dimensional accuracy and consistent performance. The external hex drive style (1-1/2" width) complies with standard wrenching practices, while the 55/64" height provides optimal thread engagement. Manufactured to Grade 8 strength specifications with center-lock distorted thread locking mechanism, this component meets industrial standards for heavy-duty applications. The zinc yellow-chromate plating provides corrosion protection while maintaining compliance with RoHS and REACH environmental regulations for industrial components.