BBC Damper Bolt Kit 1/2-20 1.550 UHL

The BBC Damper Bolt Kit 1/2-20 1.550 UHL from Optitorque Technologies LLC is a precision-engineered fastener assembly designed for serious big-block Chevrolet engine builds and harmonic balancer installations. This kit addresses a critical need in high-performance and street engine applications where proper damper retention and crankshaft integrity are essential. Whether you're assembling a stock rebuild or a modified power plant, secure damper bolting is foundational to engine longevity and reliability.

The 1/2-20 thread pitch specification indicates a half-inch diameter bolt with 20 threads per inch, standard for most BBC applications, ensuring compatibility with factory and aftermarket harmonic balancers. The 1.550 UHL (Under Head Length) dimension is critical as it controls clamping force distribution and prevents thread stripping or fastener pull-through on the crankshaft snout. Optitorque's engineering ensures these bolts meet precise OEM or performance-grade standards, providing the repeatable clamp load needed for balancer runout control and noise dampening efficiency.

Quality damper bolts prevent the subtle but destructive movement that accelerates bearing wear and internal engine damage over time. This kit is ideal for engine builders, restoration shops, and enthusiasts performing damper replacement, engine assembly, or harmonic balancer upgrades on big-block Chevrolet platforms. Anyone torquing a BBC balancer to factory specifications or upgrading to an aftermarket solution will find this kit indispensable.