Description

Overview

The Pro-Torq drive axle nut suits Eaton and Rockwell drive axle wheel ends using a 3-1/4-12 spindle thread. Its single-nut locking system replaces the traditional double-nut arrangement and includes the matching keeper, so thread size, axle position and socket size are the main checks before fitting.

Features

• 3-1/4-12 spindle thread for matching heavy-duty drive axle applications.
• 4-3/8in 8-point socket size for installation and bearing adjustment.
• Single-nut design replaces the traditional double-nut retaining arrangement.
• Includes the locking keeper used to secure the adjusted nut position.

Specifications and Materials

Drive axle configuration with a 3-1/4-12 spindle thread and 4-3/8in 8-point tool socket. The nut uses the Pro-Torq tang-style keeper system for positive retention after bearing adjustment.

Part number: 449-4973.

See the official STEMCO Pro-Torq installation procedure

Compatibility and Fitment

Confirm the drive axle uses a 3-1/4-12 spindle thread before fitting. Eaton and Rockwell applications are supported, but the axle model and spindle details still need to match because Pro-Torq fasteners cover several thread sizes and axle positions.

These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. 400-4973, 4004973, 06-411, 06411, 06-412, 06412, 06-482, 06482, 06-484, 06484, 11249, 1227-R-1240, 1227R1240, 1227-R-330, 1227R330, 1227-W-517, 1227W517, 1607744C1, 31927, A-1227-S-331, A1227S331, E-2303, E2303, E-2305, E2305, E-2466, E2466, E-2468, E2468, E-6140, E6140, E4HS-4255-AA, E4HS4255AA, L-1353, L1353, L-1355, L1355, L-1365, L1365, L-1367, L1367, M-1978, M1978, M-1980, M1980, M-1990, M1990, M-1992, M1992, TP-1572, TP1572, TP-1943, TP1943, TP-1977, TP1977, TP-1978, TP1978, 325012

Related Parts

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

Compliance and Safety

Use a torque wrench and follow the Pro-Torq bearing-adjustment procedure rather than an impact tool. After adjustment, install the keeper with the orange side facing outward, then confirm the keeper arms and keyway tang seat correctly.

Trailer Applications

This Pro-Torq drive axle nut suits matching heavy-duty drive wheel ends where the 3-1/4-12 spindle thread and 4-3/8in 8-point socket specification apply.

Cross-reference and Suitability

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

Why Choose ICS Trailers

The fastest identification check is the 3-1/4-12 spindle thread, followed by the drive axle position and 4-3/8in 8-point socket size. If the existing retaining hardware uses a double-nut system or its markings are unclear, compare the spindle thread and axle model before ordering.

• The locking keeper comes with the nut and can also be replaced separately during later wheel-end service.
• Matching the thread and axle position first prevents confusion with similar Pro-Torq nuts for steer or trailer applications.

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