Hex Head Bolt 5/16-18 x 1-1/2 Grade 5 10pk

The Hex Head Bolt 5/16-18 x 1-1/2 Grade 5 10pk by ALLSTAR PERFORMANCE is designed for high-stress automotive applications where reliability is essential. These professional-grade fasteners are ideal for mechanics and performance builders who require durable and consistent hardware for assembling engine blocks, securing suspension components, and fastening transmission housings.

Constructed from heat-treated steel, these bolts offer a minimum tensile strength of 120,000 PSI, which is characteristic of Grade 5 specifications. This strength ensures they can withstand the vibration, thermal cycling, and mechanical loads typically found in automotive environments. The 5/16-inch diameter and 18 threads-per-inch (UNC) pitch provide optimal grip and clamping force, making them suitable for a variety of applications without over-stressing components.

This 10-pack is perfect for engine rebuilds, carbureted or fuel-injected engine conversions, and performance modifications where original fasteners need replacement. Mechanics and fabricators can trust these bolts for their reliability and strength, ensuring that their automotive projects meet high-performance standards.