S/S Bolt Kit - 12pt. (5) 5/16-24 x 1.250

The ARP S/S Bolt Kit – 12pt. (5) 5/16-24 x 1.250 is a precision fastening solution engineered for demanding tactical, military, and firearms applications where corrosion resistance and reliability are non-negotiable. This five-piece stainless steel bolt set delivers the kind of dependable performance that law enforcement and military armorers depend on when assembling or maintaining suppressor mounts, rail systems, optic adapters, and other critical components. Whether you're building a custom upper receiver, securing a muzzle device, or replacing worn fasteners in field-stripped equipment, quality bolts in the correct thread pitch and length are essential to safe, repeatable operation.

Each bolt in this kit features a 12-point head geometry, which provides superior engagement with multi-point sockets and reduces the risk of rounding compared to traditional 6-point designs—a critical advantage during armory work or field maintenance where precision matters. The 5/16-24 thread pitch and 1.250-inch length make these fasteners suitable for a wide range of modular firearm components, particularly those conforming to MIL-SPEC and commercial suppressor mount standards. Manufactured from polished stainless steel, these bolts resist corrosion from moisture, salt, and sweat exposure, ensuring long service life even in harsh climates or maritime environments. The polished finish also minimizes galling during installation and removal cycles, preserving threads on expensive receivers and adapters.

Armorer-level professionals and precision shooters will recognize the value of stocking ARP stainless fasteners as part of a complete maintenance kit—having the correct size on hand eliminates improvisation and potential damage to firearm components. The five-bolt quantity provides enough fasteners for a single assembly project or multiple smaller repairs, and the compact 0.24-pound package fits easily into tool bags or maintenance kits. Installation requires standard 12-point sockets; tighten to the torque specification of your specific firearm or accessory manufacturer to ensure safe operation.