Description

Overview

Fruehauf Propar plastic hub cap closes the threaded wheel-end opening on matching Pro-Par trailer axles and suits grease-filled hub service. The clear window-face design combines a 145mm inside diameter, 157mm thread diameter and 79mm depth, while the supplied plastic O-ring and plug complete the cap assembly.

Features

• Clear plastic window-face cap for visual wheel-end inspection.
• 145mm inside diameter with a 157mm thread diameter.
• 79mm depth for the matching Pro-Par screw-on hub arrangement.
• Includes the plastic O-ring and plug.

Specifications and Materials

Product type: threaded plastic hub cap. Application: Fruehauf Pro-Par trailer wheel ends with grease-filled hubs. Included items: plastic O-ring and plug.

Part number: AP4024.

See the STEMCO hub cap installation guide for threaded Pro-Par hub cap service guidance.

Compatibility and Fitment

Because Pro-Par-style caps can share a similar appearance, match the removed cap by axle family, thread diameter, inside diameter and depth before ordering. The main mismatch risk is choosing another cap with a different thread, lubrication arrangement or cap construction.

Cross-reference numbers: BP4020, WT4020, FP8.295, IT8.295, T04-4024, FQ4020, ACC7538-900P.

Related Parts

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

Compliance and Safety

Inspect the cap threads, O-ring seating area and plug before fitting. Clean the mating surfaces and lightly lubricate the threaded cap and O-ring as appropriate, then tighten the cap using the correct wheel-end service procedure.

Trailer Applications

Workshops use this Fruehauf Propar plastic hub cap during wheel-end service on matching Pro-Par trailer axle assemblies. It suits repairs where the original screw-on plastic cap, sealing ring and plug need replacement without changing the surrounding hub arrangement.

Cross-reference and Suitability

This part cross-references to the following verified equivalent or replacement part numbers:

Why Choose ICS Trailers

Pro-Par hub caps can look similar even when the thread and sealing setup differ, so compare the 157mm thread diameter, 145mm inside diameter and 79mm depth with the removed cap. If the old part is damaged or the markings are unclear, ICS Trailers can compare photos, dimensions and axle details before you order.

• Help matching the replacement O-ring and plug for the same wheel-end repair.
• Support checking alternative part numbers against the original hub cap.

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