S-99891A185 7/8"-14 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength from Grade 8 classification, ensuring reliable performance in high-stress industrial environments.
• Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh or outdoor conditions.
• Precise left-hand thread engagement with 7/8"-14 UNF fine threads and Class 2B fit, reducing the risk of loosening under counter-clockwise motion.
• Optimized for heavy-duty applications due to the standard external hex drive and robust 1 5/16" width, allowing for high torque application.
• Enhanced durability and reusability from the fine thread spacing and steel material, minimizing wear during repeated installations.
• Wide compatibility with inch-system components and UNF standards, simplifying sourcing and replacement in existing assemblies.

Professional Applications & Engineering Value

This Grade 8 hex nut is engineered to address critical challenges in demanding industrial settings, such as machinery, automotive, and construction equipment. The left-hand thread design is ideal for applications where rotational forces could loosen standard right-hand fasteners, providing added security in assemblies subject to reverse torque. Made from zinc yellow-chromate plated steel, it offers excellent resistance to rust and corrosion, reducing maintenance costs and downtime. The 7/8"-14 UNF fine threads with Class 2B fit ensure tight, vibration-resistant connections, while the external hex drive allows for efficient installation with common tools. This nut delivers reliable performance in high-stress environments, enhancing the longevity and safety of your equipment.

Specification Summary & Compliance

This hex nut features precise Class 2B thread fit and adheres to UNF (Unified National Fine) thread standards for inch-system fasteners. Manufactured to meet high-strength requirements, it complies with industry specifications for Grade 8 fasteners, ensuring consistent dimensional accuracy. The product is designed in accordance with common industrial norms and is suitable for use in assemblies requiring left-hand threading. It meets general standards for quality and performance, supporting reliable integration in various engineering applications.