Tightening the base of a kitchen faucet requires securing its mounting hardware from underneath the sink. Turn off the water supply valves, open the cabinet doors, and locate the mounting nut threaded onto the faucet shank beneath the basin. Use an adjustable wrench or basin wrench to rotate the nut clockwise until the faucet body sits flush and immovable against the countertop. Callout type="warning" title="Hygiene Warning": Wear safety glasses while working underneath the sink. Verification: Attempt to move the faucet handle and spout from above to verify zero wobbling.
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