Bolt Kit - 12pt. (5pk) 1/2-20 x 2.500

The Bolt Kit - 12pt. (5pk) 1/2-20 x 2.500 is a professional-grade fastener set engineered for high-performance engine builds, performance automotive applications, and precision machinery assembly. This five-pack of chromoly bolts is designed for users who demand critical joint integrity where vibration resistance and material strength are non-negotiable. Whether you're building a performance engine, assembling suspension components, or securing critical fastening points, these bolts deliver the reliability required in demanding mechanical environments.

Each bolt features a 12-point head geometry that provides superior engagement and reduced fastener rounding risk compared to 6-point designs—critical when working with torque-sensitive applications. The 1/2-20 thread specification (1/2-inch diameter with 20 threads per inch) offers fine pitch threading for more gradual load distribution and improved clamp force consistency. Constructed from chromoly steel and finished in black oxide, these fasteners resist corrosion while maintaining the tensile strength and fatigue resistance necessary for motorsports, engine work, and structural assemblies where bolt failure is not an option.

Professional mechanics, engine builders, and performance enthusiasts rely on this bolt kit for head gasket applications, intake manifold fastening, and other critical under-hood assemblies where chromoly strength is standard. The 2.500-inch length accommodates various component thicknesses while the universal design ensures compatibility across multiple platforms. Installation requires standard hex wrenches sized for 12-point heads; always consult OEM torque specifications or industry standards specific to your application to ensure proper clamping force and prevent joint failure.