S-90636A046 5/16"-24 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with center lock distorted thread design, ensuring reliable performance in high-stress environments
• Exceptional corrosion protection from zinc yellow-chromate plating, extending service life in harsh industrial conditions
• High-strength Grade 8 construction providing maximum clamping force and durability for heavy-duty applications
• Precision UNF fine thread with Class 2B fit for smooth engagement and secure fastening without cross-threading
• Standard external hex drive allowing for easy installation and removal with common tools, improving assembly efficiency
• Consistent dimensional accuracy with 1/2" width and 17/64" height, ensuring compatibility and repeatable performance
• Right-hand thread direction for standard installation, reducing errors and speeding up maintenance processes

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut is engineered to address critical challenges in industrial settings where vibration and dynamic loads can compromise fastener integrity. The center lock distorted thread technology creates consistent interference along the mating bolt threads, effectively resisting loosening under cyclic stresses common in machinery, automotive, and construction equipment. Made from zinc yellow-chromate plated steel, it combats corrosion in exposed or humid environments, reducing maintenance frequency and downtime. The 5/16"-24 UNF fine thread and Class 2B thread fit ensure precise engagement, minimizing the risk of stripping and providing reliable, repeatable clamping force in high-strength fastener applications such as engine mounts, structural assemblies, and heavy machinery.

Specification Summary & Compliance

This locknut features a 5/16"-24 UNF fine thread with Class 2B thread fit for consistent dimensional accuracy and smooth assembly. It complies with standard inch system measurements and is manufactured to meet Grade 8 strength requirements, ensuring high tensile and proof load capabilities. The product adheres to industry specifications for external hex locknuts and is designed to be compatible with common regulatory standards, including RoHS and REACH for environmental safety, making it suitable for global industrial use.