Details

• Brand:

  

  

• SKU:

  W709990-S439

• Positions: Left, Right
• Other Names:

  Catalytic Converter Nut, Center Bracket Nut, Nut Spring

• Description:

  This genuine Ford spring nut, part number W709990-S439, is the front bracket and exhaust hanger nut used on the Mustang from roughly 15-25 to secure the exhaust system hanger and catalytic converter bracket. It is a spring-steel clip nut that grips a stud or bracket and provides a threaded seat, letting a bolt clamp the exhaust hanger to the body or crossmember so the system stays located and isolated. Buyers look for this nut during exhaust, converter, or hanger service, since the spring nut is often corroded or lost and the hanger will sag or rattle without it. A missing or distorted nut lets the exhaust shift, knock against the body, or stress the flex joints and hangers. Ford lists this as a genuine spring nut serving the exhaust hanger front bracket, and using the OEM part keeps the correct spring tension and thread so the bolt holds securely. Installing the correct nut restores a properly located, quiet exhaust. Position the spring nut so its threaded dimple aligns with the bolt hole, thread the bolt straight to avoid cross-threading, and tighten to the value specified for the exhaust hanger before finishing.

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