Details

• Brand:

  

  

• SKU:

  W520517-S440

• Positions: Lower Upper, Lower, Left Upper, Left Lower, Right Upper, Right Lower, Upper, Upper Lower, Rear Lower Upper, Rear Lower Lower, Rear Upper Upper, Rear Upper Lower, Rear Upper, Rear Lower, Rear Lower Inner Upper, Rear Lower Inner Lower, Front Lower Upper, Front Lower Lower
• Other Names:

  Strut Nut, Upper Control Arm Nut, Lower Control Arm Nut, Shock Nut, Suspension Strut Nut, Suspension Shock Absorber Nut, Nut Hex

• Description:

  This is a genuine Ford standardized service nut carrying the W520517-S440 service number, an M16 hex nut on the HN1 base most often cataloged as a suspension control arm nut. Depending on the catalog you will also see it listed against a strut or a shock absorber mount. Real applications that share this exact service number include the Ford Escape, Explorer and Flex along with the Lincoln Aviator, MKS and MKX, and it appears on other bodies because Ford consolidates common threaded hardware under one number. This is a single-use fastener that Ford specifies cannot be reused or reinstalled once loosened, and a fresh one should be fitted on reassembly. A large suspension nut like this that is loose, missing or reused past its clamp load lets the control arm, strut or shock shift in its mount, which shows up as a clunk over bumps, alignment that drifts, uneven tire wear and a loss of secure damping. Because one service number is listed against several model years and configurations, confirm the exact fit for your vehicle against your VIN before ordering so the thread size matches the stud you are servicing.

• Notes: Included with shock assembly. Part cannot be reused/reinstalled.
• Replaces:

  W520517S301

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