50x 5/16 UNF Fine Thread Serrated Flanged Hexagon Nuts, for UNF Bolts & Set Screws, Zinc Plated Steel BZP Flanged UNF Nuts

• Secure, Vibration-Resistant Grip – Serrated flange design grips mating surfaces to prevent loosening under vibration, ideal for machinery, automotive, and construction use.
• Compatible with UNC & UNF Threads – Designed for both coarse (UNC) and fine (UNF) imperial thread bolts and screws, ensuring broad compatibility across imperial fasteners.
• Zinc Plated Steel Construction – Made from strong carbon steel with a corrosion-resistant zinc coating for indoor and light-duty outdoor use.
• Built-In Flange Washer – Integrated washer-like flange spreads load evenly and eliminates the need for separate washers, saving time during assembly.
• Ideal for Fast, Secure Assembly – Perfect for use in metal framing, engine components, brackets, and general-purpose mechanical fastening where reliability matters.

These Imperial Serrated Flange Nuts are engineered for fast, secure fastening in a wide range of mechanical and structural applications. Compatible with both UNC (Unified Coarse) and UNF (Unified Fine) threads, each nut features a built-in washer-style flange with serrations that bite into the mating surface—resisting vibration and preventing loosening without additional lock washers. Constructed from durable steel and zinc-plated for corrosion resistance, these nuts are ideal for automotive repair, metalwork, equipment assembly, and more. A must-have for reliable, time-saving fastener setups.