Bolt Kit - 12pt. (5) 5/16-18 x 2.250

The Bolt Kit - 12pt. (5) 5/16-18 x 2.250 by ARP is a precision fastener set engineered for high-performance applications where reliability and structural integrity are non-negotiable. This five-piece kit delivers critical fastening solutions for law enforcement, military, and tactical equipment builds where standard hardware cannot withstand the stresses of duty use. Whether you're assembling custom weapon platforms, securing optics mounts, or reinforcing protective gear systems, this bolt kit provides the foundation for equipment that performs under pressure.

Each bolt features a 12-point head design, which distributes load more efficiently across fastening surfaces than conventional six-point heads and reduces the risk of bolt stripping during installation and removal cycles—critical for field-maintained equipment. The 5/16-18 thread specification (5/16-inch diameter, 18 threads per inch) provides a medium-coil fastener suitable for precision mechanical assemblies common in tactical platforms and armor systems. At 2.250 inches in length, this bolt accommodates applications requiring deeper penetration through multiple component layers without requiring washers or spacers. The compact 0.34-pound kit ships in a manageable footprint (3.85 x 0.7 x 5.95 inches), making it field-portable and easy to store in maintenance kits or vehicle emergency packs.

Professionals in weapons manufacturing, plate carrier assembly, and duty optics installation recognize ARP hardware as the standard for applications where bolt failure is not an option. This kit is ideal for technicians rebuilding upper receiver assemblies, mounting rail systems, or securing component-level fasteners on platforms where vibration and repeated deployment cycles demand superior holding power. Installation is straightforward—apply appropriate torque specifications for your application, typically 15–25 foot-pounds for 5/16 fasteners depending on material compatibility. Keep spare bolts on hand for field maintenance, equipment swaps, and emergency repairs in operational environments where hardware redundancy saves missions.