S-94191A200 5/16"-18 Fed. Spec. FF-N-836, MS51967-6 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional strength and durability with Grade 8 classification, ensuring reliable performance in high-stress and heavy-duty applications.
• Superior corrosion resistance provided by cadmium yellow-chromate plating, extending service life in harsh industrial environments.
• Easy and quick installation thanks to the external hex drive and coarse UNC threading, reducing assembly time and labor costs.
• Precise and secure fit with Class 2B thread fit, minimizing the risk of loosening under vibration and dynamic loads.
• Compliance with stringent standards including Fed. Spec. FF-N-836 and MS51967-6, ensuring consistent quality and interoperability.
• Versatile right-hand threading compatible with common UNC coarse thread bolts, ideal for machinery, construction, and automotive uses.
• Robust material construction using plated steel for a balance of high tensile strength and cost-effectiveness in industrial fastening.

Professional Applications & Engineering Value

This Grade 8 hex nut is engineered to address critical challenges in demanding industrial settings, such as vibration-induced loosening and environmental corrosion. The cadmium yellow-chromate plating on steel provides a durable barrier against moisture and chemicals, significantly enhancing longevity in outdoor or corrosive atmospheres. Its UNC coarse thread (5/16"-18) and Class 2B thread fit ensure rapid assembly and a secure hold, reducing maintenance needs in heavy-duty applications like construction equipment, automotive assemblies, and machinery frames. By meeting Fed. Spec. FF-N-836 and MS51967-6, it guarantees reliability and interchangeability, making it a trusted choice for engineers and procurement specialists seeking high-performance industrial fasteners that minimize downtime and lifecycle costs.

Specification Summary & Compliance

This hex nut features precise dimensions: 1/2" width and 17/64" height, with UNC coarse threading (5/16"-18) and Class 2B thread fit for accurate engagement. It complies with Fed. Spec. FF-N-836 and MS51967-6 manufacturing standards, ensuring consistent quality and performance. The product adheres to industry-accepted specifications for material and threading, supporting reliable use in regulated and high-stakes environments.