S-94191A113 5/16"-18 Fed. Spec. FF-N-836, MS51967-6 Hex Nuts

Key Features & Benefits at a Glance

• Maximum Durability - Grade 8 strength classification ensures reliable performance in high-stress industrial environments.
• Superior Corrosion Resistance - Black-oxide steel construction provides enhanced protection against rust and environmental degradation.
• Precision Thread Engagement - UNC coarse 5/16"-18 threads with Class 2B fit guarantee secure fastening and vibration resistance.
• Industry-Standard Compliance - Meets Fed. Spec. FF-N-836 and MS51967-6 specifications for guaranteed quality and interchangeability.
• Optimal Wrench Access - Standard external hex profile with 1/2" width enables easy installation with common tools.
• Environmental Responsibility - RoHS 3 and REACH compliance ensures safe usage in regulated applications.
• Heavy-Duty Performance - Right-hand thread direction and robust construction withstand extreme mechanical loads.

Professional Applications & Engineering Value

This Grade 8 black-oxide steel hex nut delivers exceptional engineering value through its high-strength material composition and UNC coarse thread design. The black-oxide surface treatment significantly enhances corrosion resistance, addressing common failure points in industrial equipment exposed to moisture, chemicals, or outdoor conditions. The 5/16"-18 thread size with Class 2B thread fit provides optimal engagement with mating components while resisting loosening under vibration - a critical advantage in machinery, construction, and automotive applications. Meeting Fed. Spec. FF-N-836 and MS51967-6 standards, this heavy-duty hex nut ensures reliability in structural assemblies, manufacturing equipment, and transportation systems where fastener failure is not an option.

Specification Summary & Compliance

This hex nut features 5/16"-18 UNC coarse threads with Class 2B thread fit per inch system standards. Manufacturing complies with Fed. Spec. FF-N-836 and MS51967-6 specifications, ensuring dimensional accuracy and performance consistency. The fastener is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for hazardous substance restrictions. With dimensions of 1/2" width and 17/64" height, this Grade 8 strength classified nut delivers reliable performance in demanding industrial applications.