Hex Head Bolt 1/4-28 x 1-1/2 Grade 5 10pk

The Hex Head Bolt 1/4-28 x 1-1/2 Grade 5 10-pack from ALLSTAR PERFORMANCE represents a reliable fastening solution for automotive enthusiasts tackling engine builds, suspension upgrades, and frame modifications. These bolts serve as critical structural connectors in high-vibration environments where standard hardware fails—particularly in motor mounts, intake manifolds, and performance suspension linkage where repeated thermal cycling and shock loads demand superior holding power. Whether you're assembling a stroker engine, installing a roll cage, or securing aftermarket components, having Grade 5 fasteners on hand eliminates the frustration of stripped threads or loose connections mid-project.

Grade 5 fasteners deliver 120,000 PSI tensile strength—roughly double that of consumer-grade hardware—making them the standard choice for performance automotive work. The 1/4-28 thread pitch provides fine threading, which generates superior clamping force per revolution and resists loosening under extreme vibration better than coarse-pitch alternatives. At 1-1/2 inches in length, this bolt accommodates moderate-thickness material stacking typical in motor mounts, bellhousing fasteners, and suspension bracing without excessive thread engagement or protrusion. The hex head design offers reliable wrench grip and distributes load across a broader bearing surface than Phillips or slotted heads, critical for preventing bolt-head stripping during high-torque assembly or repeated disassembly cycles.

Mechanics, engine builders, and weekend fabricators benefit most from stocking this 10-pack, as the quantity accommodates a complete component installation—typically engine bay fastening tasks—without requiring multiple orders. Use these bolts wherever OEM specifications call for Grade 5 hardware or when upgrading from factory fasteners on high-stress assemblies. Compatible with standard 3/8-inch wrenches and sockets, installation follows standard torque protocols: typically 20–25 foot-pounds for 1/4-inch Grade 5 bolts depending on application and material interface. Always apply threadlocker on critical connections in vibration-prone zones to maximize longevity and safety.