Woodruff Keys - (25) 3/16 x 3/4

Woodruff Keys - (25) 3/16 x 3/4 are precision steel fasteners engineered to lock crankshaft gears and pulleys in fixed rotational alignment on Buick and GM V6/V8 engines. As a mechanic, you know that timing component security is non-negotiable; these Pioneer keys are the OEM-grade solution for preventing catastrophic gear slip during high-RPM operation. Whether you're rebuilding a classic muscle car, replacing worn crank components, or servicing a modern V8, this 25-piece set ensures you have spares on hand for multiple engine builds or warranty inventory.

The 3/16 x 3/4 inch form factor is the standard keyway size for GM small-block and big-block applications, fitting the shallow rectangular slot machined into crankshaft journals. Pioneer's natural steel construction delivers the hardness and shear strength required to transmit rotational force without deformation under load. Each key is individually sized and chamfered to seat cleanly in the keyway, minimizing lateral play and ensuring concentricity between crank and pulley—critical for balancer timing marks and serpentine belt alignment. The compact 0.25 lb weight per set reflects their solid steel density and compact profile.

Engine builders, restoration shops, and performance mechanics rely on bulk Woodruff key inventory to avoid job delays when original hardware is missing or damaged during disassembly. Installation is straightforward: slide the key into the crankshaft keyway, align the gear or pulley, and press onto the crank journal. Compatible with Buick V6 and V8 engines as well as most GM performance platforms using standard GM crankshaft geometry, these keys are a must-stock item for any serious automotive workshop.