Hex Head Bolt 5/16-24 x 1 Grade 5 10pk

The Hex Head Bolt 5/16-24 x 1 Grade 5 10pk by ALLSTAR PERFORMANCE is an essential fastening solution for serious automotive builders, engine rebuilders, and performance mechanics working on everything from street machines to race engines. These bolts are purpose-engineered for applications where reliable clamping force and vibration resistance are non-negotiable—fuel system components, intake manifolds, timing covers, and custom bracket installations all demand hardware that won't loosen under thermal cycling and engine vibration. Whether you're assembling a stroker motor or retrofitting modern components into a vintage platform, having quality Grade 5 fasteners on hand eliminates downtime and ensures your work holds solid.

Grade 5 bolts deliver approximately 60% of the tensile strength of Grade 8, striking the ideal balance between strength and ease of installation without the risk of thread galling that can plague ultra-high-strength fasteners. The 5/16-24 thread pitch provides fine engagement, meaning fewer full rotations are required to reach target torque—critical when working in tight engine bay spaces where you need precision control. The 1-inch length makes these versatile across multiple mounting scenarios: fuel line adapters, carb stud applications, alternator brackets, and small-block engine dress-up work. ALLSTAR PERFORMANCE's reputation for consistency means you'll get uniform head geometry and thread quality across the entire 10-pack, reducing the likelihood of stripped threads or fastener failure during assembly.

Professional engine builders and weekend warriors alike benefit from stocking this 10-pack for routine maintenance, custom fabrication projects, and emergency replacements. These bolts excel in aluminum head and manifold applications where the fine thread pitch prevents loosening better than coarse fasteners, and the Grade 5 rating handles the repeated thermal stress of dyno sessions and street driving without permanent elongation. Always verify caliper torque specifications for your particular application—typically 15–22 ft-lbs for 5/16 fasteners depending on material and design. Keep a pack in your tool drawer for quick repairs, custom fuel system work, or emergency engine assembly when OEM fasteners go missing.