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Stemco · Hardware & Fasteners
449-4973
In stock · ships from Knoxville
The Stemco Pro-Torq 449-4973 is a one-piece spindle nut with an integrated keeper, built for drive axle wheel ends on heavy‑duty trucks.
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Verified fitment for 6 applications
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All confirmed applications for this part number.
Other applications
Other applications
Verify spindle thread size (3-1/4-12) and outer bearing cup/cone (580/572) before ordering. Requires a 4-3/8 in 8-point socket for installation. Installation torque: seat at 75 ft-lb, back off, then final torque 200 ft-lb.
Part data verified against 4 catalog sources
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It secures the hub onto the spindle and provides precise, controlled bearing adjustment that helps extend bearing and wheel‑end life. You replace the original retaining nut with this unit when servicing wheel bearings on Meritor, Dana, or Eaton drive axles that use 3‑1/4‑12 spindle threads. Its 8‑point external flange requires a 4‑3/8‑inch socket; installation follows a specific torque procedure (75 ft‑lb seat, back off, then 200 ft‑lb final).
Part Number: 449-4973
PRO TORQUE NUT
Unit: ea
Dealer: Knox Trailers
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