S-91240A512 3/8"-24 Fed. Spec. FF-N-836, MS35649-3384, Fed. Spec. QQ-P-35 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and outdoor applications.
• Precise, reliable fastening ensured by Class 2B fine threads (UNF 3/8"-24), offering excellent vibration resistance and a secure fit.
• Broad industry acceptance through compliance with Fed. Spec. FF-N-836 and MS35649-3384, guaranteeing consistent quality and performance.
• Enhanced durability and safety with RoHS 3 and REACH compliance, free from hazardous substances for long-term operational integrity.
• Easy installation and removal facilitated by the standard external hex drive and 5/8" width, compatible with common wrenches.
• Optimized for fine-thread applications where high tensile strength and minimal loosening under load are critical.
• Right-hand thread design provides standard, intuitive fastening direction for efficient assembly processes.

Professional Applications & Engineering Value

This 3/8"-24 UNF hex nut is engineered to address critical challenges in industrial and mechanical assemblies where corrosion resistance and thread precision are paramount. Manufactured from 18-8 Stainless Steel, it effectively combats rust and degradation in demanding environments such as marine, chemical processing, and outdoor machinery. The Class 2B fine threads deliver a tighter fit compared to coarse threads, significantly reducing the risk of loosening due to vibration—a common failure point in dynamic systems. Its compliance with Fed. Spec. FF-N-836 and MS35649-3384 ensures it meets rigorous standards for aerospace, military, and high-precision engineering applications, providing reliability where failure is not an option. The external hex drive allows for high-torque installation, making it a dependable choice for industrial fasteners in assembly lines and maintenance operations.

Specification Summary & Compliance

This hex nut features a 3/8"-24 UNF thread with Class 2B tolerance for precise fit, a width of 5/8", and height of 1/4". It conforms to Fed. Spec. FF-N-836, MS35649-3384, and QQ-P-35 for material and manufacturing standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.