S/S Bolt Kit - 12pt. (5) 5/16-18 x 1.750

The ARP Stainless Steel Bolt Kit 12pt. (5) 5/16-18 x 1.750 (SKU: ARP612-1750) is a precision fastener set engineered for critical assemblies where corrosion resistance and reliable clamping force are non-negotiable. This set contains five polished stainless steel bolts, each featuring a 5/16-18 thread size, 1.75-inch length, and a 12-point head design that interfaces with standard metric sockets and specialty tools commonly found in firearms assembly, engine building, and high-reliability mechanical work.

The 12-point head geometry on these 5/16-18 bolts provides multiple engagement angles—critical when working in tight spaces or when hex heads cannot be accessed. Polished stainless construction resists rust and corrosion in humid, salt-air, or high-moisture environments without requiring additional plating or coatings. The 1.75-inch length and 5/16 diameter make these bolts suitable for precision applications including upper/lower receiver pins, rail systems, scope mount bases, and other load-bearing fastener roles in semi-automatic platforms. Stainless steel inherently delivers lower tensile strength than hardened carbon steel, making these bolts appropriate for non-critical fastening where corrosion prevention outweighs maximum clamp load.

Precision builders, gunsmiths, and maintenance personnel select ARP fasteners for builds requiring documented material specifications and consistent dimensional tolerances. The five-piece format is ideal for kit builds, replacement sets, or spare stock. Each bolt maintains the polished finish standard for ARP stainless offerings, delivering a clean aesthetic alongside functional corrosion resistance. This kit serves the builder who understands that fastener quality directly impacts reliability and longevity in field-duty firearms and mechanical assemblies.