S/S Bolt Kit - 6pt. 5pk 5/16-18 x 1.750

The ARP S/S Bolt Kit – 6pt. 5pk 5/16-18 x 1.750 is a precision stainless steel fastener set engineered for demanding tactical, automotive, and industrial applications where corrosion resistance and structural integrity are non-negotiable. This five-pack of polished stainless bolts is designed for shooters, gunsmiths, mechanics, and equipment manufacturers who require reliable, repeatable fastening in high-stress environments. Whether securing critical components on tactical rifles, building custom firearms, or restoring high-performance engines, these bolts deliver the consistency and durability expected in professional-grade assemblies.

Each bolt in this kit features a 5/16-18 thread specification with a 1.750-inch length, topped with a robust 3/8-inch 12-point head that accommodates both standard and metric sockets for installation versatility. The polished stainless steel construction resists oxidation and corrosion in humid, salt, and chemically aggressive environments—critical for tactical gear left exposed to field conditions or marine environments. The 12-point head geometry distributes load more evenly than traditional 6-point designs, reducing stress concentration and minimizing the risk of head shearing under extreme torque. This fastener geometry is particularly valued in firearms assembly, where repeatability and failure-free performance under recoil cycles are essential.

Law enforcement armorers, military equipment technicians, and civilian gunsmiths rely on ARP-grade bolts for lower receiver builds, trigger group assemblies, and scope mount installations where component failure risks operational safety. The universal design and stainless construction make this five-pack suitable for aftermarket AR-15 builds, precision rifle work, and automotive restoration projects demanding corrosion immunity. Proper torque values (typically 12–18 foot-pounds for 5/16-18 fasteners in aluminum, higher in steel) should be applied with a calibrated wrench to avoid over-tightening. Inventory this set for backup fasteners or batch builds—the individual bolt count and proven ARP reliability make replacement and maintenance straightforward across your tactical arsenal.