BBC Flat Spiral Pin Locks - 4 Per Pack

The BBC Flat Spiral Pin Locks are precision-engineered wrist pin retainers designed specifically for small-block Chevrolet and comparable big-block Chevrolet applications. This four-pack is ideal for engine builders and performance enthusiasts who require reliable pin retention in high-performance engine builds.

Manufactured from hardened steel, these locks feature a 0.990-inch diameter and a thickness of 0.042 inches, providing consistent clamping force while resisting deformation under extreme combustion pressures. The spiral lock design effectively distributes force around the wrist pin bore, minimizing stress concentration points that could lead to failure.

Engine builders and performance shops will benefit from the reliability these pin locks offer, especially in applications where sustained high RPM and load conditions are present. Proper wrist pin retention is crucial to prevent catastrophic failures that can damage engine components, making this product a valuable addition to any engine assembly.