Hex Nut - 5/16-24 (1)

The ARP Hex Nut 5/16-24 (SKU ARP200-8602) is a premium fastening component engineered for high-performance engine and drivetrain applications where critical vibration resistance and load-bearing reliability are non-negotiable. Manufactured from chromoly steel and finished in black oxide coating, this 1/2-inch hex head nut delivers the tensile strength and corrosion resistance required in motorsports, engine building, and heavy-duty mechanical assemblies.

The 5/16-24 thread specification indicates a 5/16-inch diameter with 24 threads per inch, a fine pitch commonly used in performance engine work where precision and vibration isolation are critical. The chromoly material offers superior yield strength compared to standard steel fasteners, reducing thread stripping and loosening under thermal cycling and mechanical stress—essential characteristics for forced-induction, high-RPM, and competition-grade powerplants. Black oxide finishing provides both aesthetic consistency and a thin oxide layer that resists corrosion while maintaining coefficient of friction for proper torque-to-clamp load conversion.

This fastener is engineered for builders, machine shops, and performance technicians assembling or servicing high-output engines, supercharger installations, turbocharger manifolds, and custom cylinder head work. Individual nut purchase allows for selective replacement or assembly of critical fastening points without bulk over-ordering, making it ideal for prototype builds, repair work, or upgrading factory hardware to competition-grade components. ARP fasteners are recognized throughout the motorsports industry for quality control and reliability under extreme operating conditions.