Bolt Kit - 12pt. (5pk) 1/2-20 x 2.000

The Bolt Kit - 12pt. (5pk) 1/2-20 x 2.000 from ARP is a professional-grade fastener set engineered for high-performance engine building, racing, and precision mechanical assembly. This five-pack delivers critical fasteners where reliability and consistent clamping force are non-negotiable. Designed for builders and technicians who demand repeatable results, these bolts excel in applications requiring superior tensile strength and fatigue resistance in demanding thermal and pressure environments.

Each bolt features a 1/2-20 thread specification with a 2.000-inch length and a distinctive 12-point head geometry that distributes load more evenly across fastening surfaces compared to traditional hex designs. Manufactured from chromoly steel and finished in black oxide, these fasteners deliver exceptional tensile strength while the black oxide coating provides corrosion resistance and a professional appearance. The 12-point head design reduces corner rounding risk during installation, critical when working with tight tolerances or torque-critical applications where wrench slippage cannot be tolerated.

These bolts are ideal for engine builders, transmission rebuilders, and motorsports enthusiasts working on performance platforms where OEM fasteners fall short. The universal compatibility of this kit makes it suitable for cylinder head fastening, intake manifold mounting, carbureted and fuel-injected engine applications, and custom fabrication projects. Proper torque specification is essential—use a calibrated torque wrench and follow manufacturer guidelines for your specific application to maximize clamp load uniformity and prevent bolt preload loss during operation.