Description

Overview

The TMC TN outer axle lock nut secures the wheel-bearing adjustment on TN trailer axle wheel ends that use the double-nut and lock-washer arrangement. Its 82mm A/F, 64.5mm internal diameter and 12mm thickness distinguish the outer lock nut from the larger inner adjusting nut.

Features

• Outer nut position in the TN wheel-bearing retaining stack.
• Works with the inner adjusting nut and axle lock washer.
• 82mm A/F for the matching service tool.

Specifications and Materials

Across flats: 82mm. Internal diameter: 64.5mm. Thickness: 12mm.

Part number: AP4250.

For TN wheel-end procedures, see TMC axle service guidance

Compatibility and Fitment

Match the outer nut position, 82mm A/F and 12mm thickness before fitting. TMC TN wheel ends use a separate inner adjusting nut, so the two nuts are not interchangeable even though they sit in the same bearing-retention assembly.

Related Parts

Compliance and Safety

Keep the inner adjusting nut, lock washer and outer lock nut in the correct order during reassembly. Bearing adjustment and lock-nut torque vary with the TN wheel-end configuration, so follow the applicable axle service procedure rather than using a generic torque value.

Trailer Applications

The TMC TN outer axle lock nut suits wheel ends that use the traditional double-nut bearing retention system, including matching Pan 19 and Pan 22 disc-brake axle assemblies.

Why Choose ICS Trailers

The main ordering mistake is swapping the outer lock nut with the larger inner adjusting nut. Compare the 82mm A/F, 64.5mm internal diameter and 12mm thickness with the removed part. If the wheel end is already dismantled, keep the nut and washer stack in order or photograph it before cleaning.

• Pair it with the correct inner adjusting nut and lock washer during wheel-bearing service.
• Check the TN axle and hub arrangement before replacing mixed or unidentified hardware.

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