Short (3/4in) Crank Key

The MR. GASKET short (3/4in) crank key is a precision-engineered crankshaft fastening component designed for serious engine builders and performance mechanics working with Chevy and Mopar platforms. This 3/16-inch thick Woodruff key maintains critical alignment between the crankshaft and its driving components—pulleys, dampers, and timing gears—ensuring that rotational force transfers efficiently without slip or drift. Whether you're assembling a stock rebuild or a high-RPM performance engine, a properly installed crank key is non-negotiable for reliability and longevity.

Manufactured from hardened steel with a natural finish, this Woodruff-style key features a 0-degree offset design that positions it flush within the crankshaft keyway for maximum engagement and load distribution. The compact 3/4-inch length and 3/16-inch cross-section are engineered to fit factory keyway specifications on compatible big-block and small-block engines, preventing angular misalignment that can cause timing errors, harmonic imbalance, or pulley slippage. MR. GASKET's reputation for precision manufacturing ensures tight tolerances and consistent fit, eliminating the guesswork during engine assembly and reducing the risk of expensive rework or failure.

This crank key is essential for mechanics and enthusiasts rebuilding vintage muscle cars, street rods, or race engines where every component must meet OEM or period-correct specifications. During crankshaft installation, the key seats into both the shaft keyway and the hub or pulley bore, creating a mechanical lock that resists rotational forces and vibration. Installation is straightforward—insert the key into the crankshaft keyway before mounting the damper or pulley, then torque the retaining bolt to factory specs. This single component is your insurance policy against catastrophic timing failure; stock up on spares for your next big-cube build.