Bolt Kit - 12pt. (5) 3/8-16 x 1.000

The ARP Bolt Kit - 12pt. (5) 3/8-16 x 1.000 represents a precision fastening solution engineered for mission-critical applications in tactical, firearms, and equipment assembly work. Built for professionals who demand repeatability and reliability—law enforcement armorers, military maintenance teams, and tactical equipment builders—this five-piece kit addresses the specific fastening requirements of high-performance systems where standard hardware falls short. ARP's heritage in aerospace and automotive fastening translates directly to the demands of precision firearm builds and tactical gear assembly, where bolt integrity directly impacts safety and performance.

Each bolt in this kit features a 12-point head design, which distributes load more evenly than conventional 6-point fasteners and reduces camming-out risk during installation—critical when working with precision receivers, scope mounts, or tactical rail systems. The 3/8-16 thread specification (3/8-inch diameter, 16 threads per inch) is the industry standard for upper receiver, handguard, and optics mount applications across modern rifle platforms. The 1.000-inch length accommodates through-bolt scenarios where fastener grip length is carefully controlled. ARP's fastening technology ensures consistent clamp load and eliminates the frustration of bolt shear or loosening under recoil impulse, delivering the kind of reliability that separates quality builds from budget alternatives.

Armorers and gunsmiths rely on this bolt kit for AR platform assembly, precision optics mounting, and tactical rail attachment—anywhere fastener consistency matters. The five-bolt quantity provides coverage for a complete upper receiver build or multiple mounting points on a single firearm system. Proper installation with a calibrated torque wrench (typically 25–35 ft-lbs for this thread size, depending on application) ensures maximum clamp load without stripping or bolt failure. Whether you're building a precision rifle, maintaining fleet firearms, or assembling tactical equipment, the ARP Bolt Kit delivers the fastening integrity that professionals expect.