06609500 – Square Key .250″ × .250″ × 1.00″ (Genuine OEM Ariens / Gravely) The 06609500 square key is a genuine OEM Ariens / Gravely steel key designed to securely lock pulleys, hubs, sprockets, and drive components to a keyed shaft. This precision square key ensures proper torque transfer and alignment in mower deck, drive, and power transmission systems. Manufactured to Ariens and Gravely factory specifications, this key provides reliable engagement between mating components and helps prevent slippage, wear, or shaft damage during operation. Key Details Manufacturer Part Number: 06609500 Part Name: Square Key Brand: Ariens / Gravely Size: 0.250″ × 0.250″ × 1.00″ Key Type: Square (Straight) Material: Steel Function: Locks rotating components to shaft Installation: Direct OEM replacement Function The 06609500 square key fits into a straight keyway machined into both the shaft and the mounted component. It prevents relative rotation, ensuring consistent power transfer under load in demanding mowing and drive applications. Applications Used across a wide range of Ariens and Gravely equipment, including: Mower deck drive systems PTO and pulley assemblies Transmission and ground drive components Engine-to-drive power transfer applications (Exact usage depends on model and serial number.) Why Use Genuine OEM 06609500 Exact OEM dimensions for proper fit Reliable torque transfer Reduces wear on shafts and hubs Long-lasting performance under vibration and load This square key is the correct OEM replacement choice for maintaining factory-level reliability in Ariens and Gravely mower and drive systems.