S/S Bolt Kit - 6pt. (5) 1/4-20 x 2.500

The S/S Bolt Kit - 6pt. (5) 1/4-20 x 2.500 from ARP is a critical fastener solution for serious engine builders, performance mechanics, and automotive enthusiasts undertaking high-stress applications. These stainless steel bolts exist to replace factory fasteners in critical engine assembly points where clamping force, corrosion resistance, and reliability cannot be compromised. Whether you're building a race engine, restoring a classic, or executing a high-horsepower modification, ARP fasteners are engineered to hold under extreme pressure and temperature cycling.

This kit contains five 1/4-20 inch stainless steel bolts with 2.500-inch length and 6-point heads, manufactured to ARP's exacting standards for tensile strength and dimensional consistency. The 1/4-20 thread specification denotes a 1/4-inch diameter with 20 threads per inch—a metric fundamental for precise torque application and load distribution. Stainless steel construction delivers superior corrosion resistance compared to standard hardware, eliminating rust-through in wet climates and fuel-exposed environments. The 6-point head design provides superior engagement with quality sockets, reducing fastener rounding and improving torque accuracy during assembly and reassembly.

Mechanics and builders rely on ARP fastener kits for intake manifold bolts, water pump security, timing cover applications, and other engine bay locations where vibration and thermal stress demand uncompromising hardware. The compact kit weight of 0.24 lbs makes it easy to stock, while the standardized dimensions ensure compatibility with OEM socket tools and torque wrenches. These bolts are ideal for engine rebuilds, performance machine work, and restoration projects where factory fasteners have fatigued or where upgraded clamping force is required for modified engine builds.