Details

• Brand:

  

  

• SKU:

  W705992-S441

• Positions: Lower
• Other Names:

  Lower Deflector Nut, Nut Hex

• Description:

  This genuine Ford hex nut, part number W705992-S441, is the lower deflector and radiator support splash shield nut used on the Mustang from roughly 05-09 to secure the lower air deflector and splash shield to the radiator support. Sized at 4.2 x 1.41 x 10.0, it threads onto a stud or screw to clamp the shield against the support, keeping the deflector positioned to manage airflow and protect the lower engine bay from road spray. Buyers look for this nut after front-end or cooling service, since the small nut is often corroded or lost and the deflector will sag or flap without it. A loose or missing nut lets the splash shield droop, flutter at speed, or allow debris under the front of the car. Ford catalogs this as a genuine hex nut, and using the OEM part keeps the correct thread and clamp so the shield seats firmly. Installing the proper nut restores a secure deflector and proper airflow management. Seat the nut fully and tighten to the value specified for the shield hardware without crushing the plastic, confirming the deflector edge is held flat against the support before finishing.

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