S/S 12pt. Nut - 3/8-16 (1)

The S/S 12pt. Nut - 3/8-16 from ARP is a stainless steel fastener engineered for high-reliability applications where corrosion resistance and precise thread engagement are non-negotiable. Designed for use in automotive, marine, and industrial assembly, this single polished stainless nut accommodates the 3/8-16 thread standard and delivers the durability required in demanding environments. Whether you're building a race engine, restoring a classic vehicle, or completing a precision mechanical assembly, this fastener provides the dependable hold that professionals demand.

Manufactured from premium stainless steel, the 12-point head design distributes load more evenly across the fastening surface than traditional hexagonal nuts, reducing stress concentration and minimizing the risk of fastener failure under vibration or high-stress conditions. The polished finish not only enhances corrosion resistance in salt spray and humid environments but also improves aesthetics for visible engine bay and mechanical assemblies. The 7/16-inch head geometry pairs perfectly with standard 3/8-16 bolts and studs, ensuring proper fit without galling or thread stripping. Stainless steel's inherent resistance to rust and oxidation makes this nut ideal for applications exposed to moisture, chemicals, or temperature cycling.

Engine builders, fabricators, and mechanics rely on ARP fasteners for critical applications where failure is not an option. The 3/8-16 size is commonly used in intake manifold, cylinder head, and accessory bracket installations across a wide range of engines. This individual nut is sold as a single unit, making it ideal for replacement, repair, or completing small-batch assembly projects. Compatible with any 3/8-16 threaded stud or bolt, installation is straightforward—simply thread onto the corresponding fastener and torque to specification per your engine or application manual for optimal clamp load and reliability.