Hex Head Bolt 5/16-18 x 1 Grade 5 10pk

The ALLSTAR PERFORMANCE Hex Head Bolt 5/16-18 x 1 Grade 5 10-pack delivers proven fastening reliability for high-stress mechanical assemblies where vibration resistance and shear strength are critical. Grade 5 steel construction meets or exceeds SAE J429 specifications, making these bolts suitable for engine builds, transmission work, suspension systems, and other demanding applications where standard fasteners would fail under load.

Each bolt in this set features a 5/16-inch diameter with 18 threads-per-inch (TPI) pitch and 1-inch length—a configuration commonly encountered in automotive, marine, and industrial equipment repair. The 1/2-inch hex head provides adequate wrench contact surface for controlled torque application without rounding, while the zinc oxide finish resists corrosion in moderately harsh environments. Grade 5 material offers superior tensile strength compared to Grade 2 fasteners, reducing the risk of shank failure under sustained vibration or impact loading typical of engine bay conditions.

Mechanics, fabricators, and restoration specialists rely on Grade 5 fasteners when OEM specifications call for enhanced strength or when upgrading original equipment. The 10-pack quantity positions this set as a practical shop staple for bolt-on repairs, bracket installation, and general-purpose fastening without excessive inventory. Universal compatibility across multiple platforms makes these bolts a standard replacement for 5/16-18 applications in automotive, powersports, and light industrial sectors.

For buyers sourcing Grade 5 fasteners in bulk, this pack delivers verified SAE compliance at a competitive per-unit cost. Whether stocking a workshop, completing an engine rebuild, or maintaining equipment that demands reliable fastening, ALLSTAR PERFORMANCE bolts provide the strength and consistency that serious builders expect.