Details

• Brand:

  

  

• SKU:

  378941-S441

• Other Names:

  Nut Hex

• Description:

  This is the genuine Ford hex locking nut in the 3/8-24 size from the 6441 base hardware family, a prevailing-torque locking nut used in torque-critical locations across several applications, including as a connecting-rod nut on the 4.0 liter engine of the 2002 to 2005 Explorer Sport Trac and as a flexplate-to-converter locking nut on classic Mustang applications, among general uses. The prevailing-torque feature resists loosening under vibration without relying on a separate lock washer, which is why Ford specifies it where a joint must stay tight under cyclic load. Because these locations are torque-critical and often involve rotating assemblies, the correct nut and correct tightening are essential; a substitute or reused locking nut may not hold clamp load and can back off, with serious consequences in connecting-rod or driveline service. Fitting fresh nuts of the correct specification restores reliable retention. The prevailing-torque locking element is most effective when new, so install new nuts rather than reusing the originals in these critical joints, clean the threads, and tighten using the factory torque value and sequence, including any torque-angle steps where specified. Inspect the mating threads and components while apart. Confirm the exact application and torque procedure against the service information before ordering and installing. Genuine Ford construction ensures the nut matches the original thread specification, locking feature and strength class for safe, reliable clamp load.

• Replaces:

  378941s440, 379299s2, e7ry6441a, e820222s72, e820222s721, f6az6441aa

WARNING: California Proposition 65

×

California Proposition 65

WARNING: Cancer and reproductive harm - www.P65Warnings.ca.gov