Description

Overview

BPW axle shaft nut secures the wheel hub and bearing arrangement on old-generation BPW conventional axle wheel ends. Because its M52x2 thread, 91mm outside diameter and 52mm thickness identify this version, physical size checks matter before ordering.

Features

• M52x2 internal thread for the matching BPW spindle.
• 91mm outside diameter, 50mm inside diameter and 52mm thickness.
• 80mm spanner size for workshop removal and installation.
• Castellated profile uses split-pin retention at the axle end.

Specifications and Materials

Product type: castellated axle shaft nut. Thread: M52x2. Outside diameter: 91mm. Inside diameter: 50mm. Thickness: 52mm. Spanner size: 80mm.

Part number: AP1003.

See the BPW trailer axle workshop manual for wheel-end service procedures

Compatibility and Fitment

Match the M52x2 thread, 91mm outside diameter, 52mm thickness and old-generation conventional hub arrangement. Do not substitute a later BPW axle nut solely because it also uses an M52x2 thread, because later wheel-end versions can differ in outside profile and height.

These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. 0326217080, 03.262.17.08.0, T04-1003, T041003, WT4003, 070.037, 070037, 04174, 52177, 10.10050, 1010050, 046.027-00A, 04602700A

Related Parts

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

Compliance and Safety

Inspect the spindle thread and split-pin hole before fitting. Replace damaged retaining hardware, then follow the axle-specific tightening and retention procedure for the wheel end.

Trailer Applications

Workshops fit the BPW axle shaft nut during wheel-end service on older BPW trailer axles with conventional hubs, especially when hub or bearing work requires axle-nut removal.

Cross-reference and Suitability

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

Why Choose ICS Trailers

Older BPW axle nuts are easy to confuse with later M52x2 versions, so compare the removed nut rather than relying on thread size alone. If the old part is worn or unmarked, ICS Trailers can help compare its diameter, thickness, castellated shape and axle details before you order.

• Support with matching wheel-end service parts around older BPW conventional hubs.
• Cross-reference help for OEM and aftermarket axle-nut numbers.

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