Woodruff Key - 3/16 x 1-3/8 in

The Woodruff Key - 3/16 x 1-3/8 in is a precision-engineered engine component designed to prevent shaft slippage and maintain positive drive alignment in high-stress rotating applications. This small but critical fastener is essential for mechanics, engine rebuilders, and automotive specialists who require reliable shaft-to-hub coupling in small engines, compressors, pumps, and power equipment. The Woodruff Key serves as a mechanical lock that transfers torque between a shaft and hub while accommodating radial loads, making it indispensable in any engine assembly or repair operation where rotational synchronization cannot fail.

Manufactured by DURA-BOND under model designation AK-003-P, this Woodruff Key features a semicircular, half-moon profile that seats into a corresponding keyway slot on both the shaft and hub. The 3/16-inch width and 1-3/8-inch length dimensions are precision-ground to automotive industry standards, ensuring a snug, slip-free fit that eliminates play and vibration. Constructed from hardened steel for maximum durability, the key resists shearing forces and maintains its integrity under repetitive cycles, thermal stress, and high-RPM conditions typical of small-displacement engines and industrial equipment.

This compact Woodruff Key is ideal for technicians rebuilding small engines, restoring vintage equipment, or servicing industrial machinery requiring reliable shaft locking. Installation is straightforward: simply insert the key into the shaft keyway slot before coupling the hub, ensuring proper alignment and preventing any relative rotation between components. Compatible with any standard engine assembly using 3/16 x 1-3/8 keyways, it is a cost-effective replacement part that guarantees professional-grade performance and longevity in both OEM and aftermarket applications.