12pt SS Nut 5/16-18 2pk

The ARP 12pt SS Nut 5/16-18 2pk (SKU ARP401-8323) is a precision fastening solution engineered for high-performance applications where reliability and material integrity are non-negotiable. These stainless steel nuts are purpose-built for builders and technicians who demand corrosion resistance and consistent clamping force in demanding environments. Whether assembling engine components, structural assemblies, or critical mechanical systems, this two-pack delivers matched fasteners rated for professional-grade service.

Manufactured from polished stainless steel, the 12pt SS Nut features a 12-point head design that provides superior engagement with both standard and metric sockets and wrenches, reducing fastener rounding and slippage during installation and removal. The 5/16-18 thread specification (5/16-inch diameter with 18 threads per inch) ensures compatibility with corresponding bolts and studs across automotive, powersports, and industrial applications. Polished stainless construction resists rust, oxidation, and corrosion in wet, salty, or chemically aggressive conditions while maintaining structural integrity over thousands of thermal cycles.

This two-pack is ideal for engine builders, transmission assembly work, suspension modifications, and any application requiring matched pairs of corrosion-resistant fasteners. The 12-point design is especially valued in tight-clearance builds where a standard hex wrench cannot fit, and the stainless material is essential for marine, motorsports, and high-vibration environments. Installers should verify thread pitch compatibility and apply appropriate torque values according to ARP specifications and application requirements for optimal clamping and longevity.