S-94191A111 1/4"-20 Fed. Spec. FF-N-836, MS51967-3 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Grade 8 steel construction, ensuring dependable performance in high-stress industrial environments.
• Superior corrosion resistance thanks to the black-oxide coating, extending service life and reducing maintenance in harsh conditions.
• Precise and secure fit with Class 2B thread fit and UNC coarse thread design, minimizing the risk of cross-threading and ensuring easy installation.
• Broad compatibility with standard 1/4"-20 UNC coarse threaded bolts, making it ideal for a wide range of assembly applications.
• Compliance with stringent standards including Fed. Spec. FF-N-836 and MS51967-3, guaranteeing consistent quality and safety.
• Environmental and regulatory safety through RoHS 3 and REACH compliance, supporting sustainable and responsible manufacturing practices.
• Optimized for heavy-duty use with a standard external hex drive and robust profile, enabling efficient torque application and long-term durability.

Professional Applications & Engineering Value

This Grade 8 black-oxide steel hex nut is engineered to address critical challenges in industrial fastening, such as vibration loosening and environmental degradation. The UNC coarse thread and Class 2B thread fit provide excellent engagement with mating bolts, reducing assembly time and enhancing joint integrity in machinery, automotive, and construction applications. The black-oxide surface treatment offers a protective layer that resists rust and wear, ensuring reliable performance even in moist or corrosive settings. By meeting Fed. Spec. FF-N-836 and MS51967-3, it delivers consistent dimensional accuracy and strength, making it a trusted choice for engineers seeking durable, heavy-duty industrial fasteners that minimize downtime and maintenance costs.

Specification Summary & Compliance

This hex nut features a 1/4"-20 UNC coarse thread with Class 2B thread fit for precise tolerance, adhering to Fed. Spec. FF-N-836 and MS51967-3 manufacturing standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance control. Dimensions include a width of 7/16" and height of 7/32", supporting reliable performance in various assembly contexts.