S/S Bolt Kit - 12pt. (5) 8mm x 1.25 x 25

The ARP S/S Bolt Kit – 12pt. 8mm x 1.25 x 25 (5-pack) is a precision stainless steel fastener set designed for tactical firearm builds, chassis systems, and modular weapon platform assembly. Whether you're a gunsmith, armorer, or serious enthusiast rebuilding bolt carrier groups, installing rail systems, or securing optic mounts, this universal bolt kit delivers the corrosion resistance and dimensional accuracy required in field environments. Stainless steel construction ensures longevity in harsh conditions where standard hardware fails.

Each bolt in this five-piece set measures 8mm x 1.25 thread pitch with a 25mm length and features a polished 12-point head for secure engagement with multi-sided sockets and wrenches. The 12-point geometry distributes load evenly across fastening points, reducing the risk of head stripping—critical when working with aluminum receivers or precision-machined components. ARP's stainless construction resists oxidation and maintains structural integrity across temperature fluctuations, making these bolts ideal for both stateside training and sustained field operations where equipment reliability is non-negotiable.

Law enforcement armorers, military gunsmiths, and precision rifle builders rely on metric-standard fasteners like the ARP 8mm x 1.25 bolt for HK-platform builds, AR-pattern adaptors, and European firearm architectures. The universal design accommodates a wide range of mounting applications without caliber or platform restrictions. At 0.21 lbs for the complete set and compact 3.9 x 0.65 x 6-inch packaging, these bolts travel light in maintenance kits and gunsmith toolbags. Installation requires standard hex or 12-point socket tools; torque specifications should match your specific application's manufacturer guidance for optimal performance and safety.