S/S Bolt Kit 12pt 5pk 3/8-16 x 2.250

The ARP Stainless Steel Bolt Kit 12pt 5pk 3/8-16 x 2.250 (part number 615-2250) is a precision fastener set engineered for demanding mechanical applications where corrosion resistance and reliable clamping force are non-negotiable. This five-pack of stainless steel bolts features 12-point heads, a thread specification of 3/8-16 inch, and a 2.250-inch length—dimensions optimized for engine assembly, aerospace fastening, and high-load industrial duty where thread engagement and head geometry directly impact reliability.

ARP (Applied Racing Products) bolts are manufactured to exacting tolerances and finished to polished stainless, offering superior corrosion protection in salt-air, moisture, and chemically aggressive environments. The 12-point head design reduces corner rounding and permits higher torque application than conventional hex fasteners of equivalent size. The 3/8-16 thread pitch and 2.250-inch length configuration provides adequate thread engagement while maintaining the minimal stack height critical in tight engine compartments, valve cover applications, and transmission pan installations. Stainless construction resists oxidation and galling—a significant advantage over mild steel in repeated assembly cycles.

This fastener set serves engine builders, restoration specialists, marine mechanics, and high-performance technicians who require fasteners that withstand thermal cycling, vibration, and corrosive exposure without degradation. The five-pack quantity supports typical small-engine or component-level assemblies where matched fastener sets ensure uniform clamping and consistent preload distribution. Whether securing valve covers, accessory mounts, or structural components in salt-water environments, these ARP bolts deliver the dimensional stability and material integrity that prevent joint separation and fastener failure over extended service life.