S/S Bolt Kit - 6pt. (5) 3/8-16 x 1.500

The S/S Bolt Kit - 6pt. (5) 3/8-16 x 1.500 from ARP represents the gold standard for critical fastening applications in high-performance automotive builds. Whether you're assembling an engine block, securing structural components under extreme load, or upgrading from factory hardware, these stainless steel bolts deliver the reliability that separates amateur builds from professional-grade work. ARP fasteners are engineered for applications where vibration, temperature cycling, and sustained stress demand materials that won't fail—a necessity any serious mechanic or performance enthusiast will recognize immediately.

Constructed from premium stainless steel with 6-point heads, these bolts offer superior corrosion resistance compared to standard steel fasteners while maintaining excellent tensile strength and clamping force consistency. The 3/8-16 thread pitch (5/16-inch diameter with 16 threads per inch) and 1.500-inch length make these ideal for engine bay applications where precision fit and repeatable load distribution are critical. The six-point head design provides a positive grip surface that resists stripping during installation and removal, reducing the risk of bolt damage during high-torque assembly procedures. Stainless steel construction ensures these fasteners resist rust, salt exposure, and thermal degradation—essential qualities for long-term reliability in demanding environments.

This five-bolt kit suits engine block assembly, cylinder head work, intake manifold fastening, and any application requiring matched, precision-grade fasteners with superior corrosion protection. Installation requires standard 9/16-inch hex wrenches or sockets; always apply appropriate torque specifications for your particular application—ARP publishes detailed torque charts for each fastener size and material grade. Compatible with both carbureted and fuel-injected engines, naturally aspirated and forced-induction builds, these bolts represent a smart upgrade for anyone performing machine work, rebuilds, or performance modifications where factory hardware may prove insufficient.