Bolt Kit - 12pt. (5) 3/8-24 x 1.500

The Bolt Kit - 12pt. (5) 3/8-24 x 1.500 from ARP is a precision fastener set engineered for critical applications in tactical, military, and high-performance automotive environments. This five-piece kit supplies chromoly bolts rated for demanding assembly work where standard fasteners fall short. Whether you're building a custom AR platform upper, assembling suppressor components, or securing critical mechanical assemblies in field conditions, these bolts deliver the strength and consistency professional operators and gunsmiths expect.

Each bolt in this kit features a 3/8-inch diameter with a 24 threads-per-inch pitch (3/8-24), measuring 1.5 inches in length and topped with a 12-point head design that allows secure engagement with standard hex sockets and specialized tactical tools. The chromoly steel construction provides superior tensile strength compared to mild steel, resisting shear forces and vibration-induced loosening under recoil impulse and sustained use. Black oxide coating provides corrosion resistance and a non-reflective finish suitable for tactical applications where light reflection must be minimized. The 12-point head geometry distributes load evenly across fastening tools, reducing stripping risk during high-torque assembly—critical when working with precision components that demand perfect concentricity.

This bolt kit serves armorers, gunsmiths, and field maintenance teams who require OEM-grade fasteners for suppressor mounts, brake assemblies, rail systems, and upper receiver work. The universal design makes it compatible with any platform accepting 3/8-24 fasteners, from modern rifle platforms to legacy systems requiring repair or upgrade. Professional shooters and military personnel benefit from the redundancy of a five-piece set—ensuring replacement bolts are always on hand during extended field operations or competition events. Installation is straightforward: simply thread into 3/8-24 tapped holes and torque to specification using appropriate tools. For optimal performance, apply appropriate thread-locking compound and torque to the fastener manufacturer's specification based on your specific assembly application.