S-90636A080 3/4"-16 Locknuts

Key Features & Benefits at a Glance

• Vibration-resistant locking performance through center-lock distorted thread design that maintains secure fastening under dynamic loads
• Exceptional strength and durability with Grade 8 classification, ensuring reliable performance in heavy-duty applications
• Superior corrosion protection provided by zinc yellow-chromate plating, extending service life in harsh environments
• Precise thread engagement with Class 2B thread fit and UNF fine threads for optimal clamping force distribution
• Easy installation and removal using standard external hex drive compatible with common wrench tools
• Right-hand thread direction following industry standards for straightforward assembly in conventional applications
• Robust dimensional profile with 1 1/8" width and 41/64" height providing substantial bearing surface for load distribution

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut with center-lock distorted thread technology addresses critical vibration-induced loosening challenges in demanding industrial environments. The zinc yellow-chromate plated steel construction provides dual protection against corrosion while maintaining the structural integrity required for high-stress applications. Engineered with 3/4"-16 UNF fine threads and Class 2B thread fit, this locknut ensures precise engagement and consistent clamping force in automotive assemblies, heavy machinery, and industrial equipment where vibration resistance is paramount. The distorted thread design creates permanent mechanical interference that prevents back-off without compromising reusability, making it ideal for maintenance-critical applications requiring periodic disassembly and reassembly.

Specification Summary & Compliance

This heavy-duty locknut features Class 2B thread fit per UNF standards with 3/4"-16 fine thread specification and right-hand thread direction. Manufactured to Grade 8 strength classification requirements, the component meets industry standards for high-strength fasteners. The zinc yellow-chromate plating provides corrosion resistance while maintaining compliance with RoHS and REACH environmental regulations. Dimensional specifications include 1 1/8" width across flats and 41/64" height, ensuring compatibility with standard wrench tools and application requirements.