Description

Overview

Pro-Torq trailer axle nut locks wheel-end bearing adjustment on Fruehauf Pro-Par and Meritor TP trailer axle applications. It replaces traditional multi-nut adjustment with a single-nut setup that helps technicians set the wheel end cleanly and consistently.

Features

• Suits Fruehauf Pro-Par and Meritor TP trailer axle wheel ends.
• 3.480″-12 thread size for matching parallel spindle applications.
• Uses a 4 13/16″ 8-point socket for installation.
• Single-nut Pro-Torq design removes the need for separate wheel-end washers.

Specifications and Materials

The Pro-Torq trailer axle nut carries a 3.480″-12 thread and matches HM518445 outer bearing cone with HM518410 outer bearing cup applications. Use a 4 13/16″ 8-point socket, or OTC 1941 equivalent, when fitting the nut.

Part number: 447.4723.

Use the manufacturer Pro-Torq data sheet when matching axle application, thread and socket details.

Compatibility and Fitment

Confirm this Pro-Torq trailer axle nut against the axle model, spindle thread, outer bearing set and socket size before ordering. For Pro-Par and Meritor TP applications, check the axle date code because the listed fitment applies to post 1 January 2006 axle date codes.

These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. 400-4723, 4004723, 480-4723, 4804723

Related Parts

Check the related service parts below against the trailer setup before ordering.

Compliance and Safety

Remove the keeper before tightening or loosening the nut on the spindle. Also replace the Pro-Torq keeper each time it comes out during wheel-end maintenance, because the keeper provides the locking action after adjustment.

Trailer Applications

Fleets and workshops use this nut on heavy trailer wheel ends running Fruehauf Pro-Par or Meritor TP axle equipment. When the wheel end comes apart, inspect the bearings, seal, spindle thread and keeper condition before reassembly.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Videos

Stemco provides the Pro-Torq 2-1-1 installation video for wheel-end adjustment procedure guidance.

The Pro-Torq product highlight video covers the single-nut system and wheel-end service role.

Why Choose ICS Trailers

ICS Trailers supplies wheel-end hardware for trailer axle service, including axle nuts, bearings, seals and related service parts for heavy transport maintenance. Browse more Axle and Wheel End trailer parts from ICS Trailers