Description

Overview

General purpose window hub cap closes matching trailer wheel ends for oil or grease lubrication. This six-hole version uses a clear window face, 140mm PCD, 111mm ID, 159mm OD and 68mm depth.

Features

• Clear window face for lubricant inspection.
• Six-hole mounting on a 140mm PCD.
• Suits oil or grease filled hubs.

Specifications and Materials

The cap measures 111mm ID, 159mm OD and 68mm deep with a six-hole 140mm mounting PCD.

Part number: AP4031.

See the STEMCO wheel-end catalogue for 4009-series hub cap dimensions and service information

Compatibility and Fitment

Compare the removed cap by hole count, 140mm PCD, 111mm opening, 159mm OD and 68mm depth before ordering. Cross-reference numbers: 343-4009, BP4029, WT4029.

Related Parts

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

Compliance and Safety

Clean the hub flange, inspect the sealing face and tighten all six mounting bolts evenly to the axle manufacturer’s specification. Check for lubricant seepage after fitting.

Trailer Applications

This cap suits trailer wheel ends using a matching six-hole 140mm PCD flange.

Cross-reference and Suitability

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

Why Choose ICS Trailers

Six-hole hub caps can look alike while using different bolt circles, openings and depths. ICS Trailers can compare the 140mm PCD, 111mm ID, 159mm OD and 68mm depth against your removed cap or wheel-end measurements before you order. We can also help identify the matching plug and gasket options for the same hub service.

• Compare photos and measurements when old markings are unclear.
• Match surrounding wheel-end service parts for the repair.

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