Sentinel Steer Oil Hub Cap 4.5in 6-Bolt

Allan Davis on 11/08/2026

Sentinel steer oil hub cap 4.5in 6-bolt

Sentinel Steer Oil Hub Cap 4.5in 6-Bolt

$84.00

Integrated Sentinel steer oil hub cap for 4.5in six-bolt wheel ends, using 5/16in mounting bolts with a 2-5/8in overall depth and clear oil-level window. Match the 4024 hub-cap pattern and gasket before fitting.

Part number 356-4024.

Quick Quote

SKU: 356-4024 Category: Tags: , , , , , , , , , , , , , , , Brand:
This field is for validation purposes and should be left unchanged.

Description

Overview

The Sentinel steer oil hub cap suits steer axle wheel ends using a 4.5in bolt circle, six 5/16in mounting bolts and the 4024 hub-cap pattern. Integrated Sentinel construction combines oil-level viewing and venting in the window assembly, which separates this version from traditional 4024-series hub caps.

Features

  • Integrated Sentinel oil hub cap for steer axle applications.
  • 4.5in bolt circle with six 5/16in mounting bolts.
  • 2-5/8in overall depth with 5-1/4in flange outside diameter.
  • Clear oil-level window for wheel-end lubricant checks.

Specifications and Materials

Application: steer axle. Lubrication: oil. Bolt circle: 4.5in. Bolt count: 6. Bolt size: 5/16in. Overall depth: 2-5/8in. Inside depth: 1-7/8in. Flange ID: 3-1/2in. Flange OD: 5-1/4in.

Part number: 356-4024.

See the official STEMCO hub cap installation guide

Compatibility and Fitment

Match the 4.5in six-bolt pattern and 4024 hub-cap dimensions before fitting. These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. 1612, 366-4024, 3664024, 367-4024, 3674024, ZCP3564024

Related Parts

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

Use Part number Part type
Gasket to suit AP4197 4.5in 6-hole hub cap gasket
Window kit to suit 359-6143 Oil window kit

 

Compliance and Safety

Install the hub cap with a new gasket on clean mounting surfaces. Tighten the 5/16in mounting bolts evenly in a cross pattern, then fill the hub only to the marked oil level.

Trailer Applications

Matching steer axle wheel ends can use this Sentinel oil hub cap when they require the 4.5in 4024 mounting pattern and an oil-lubricated hub configuration.

Cross-reference and Suitability

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

1612 366-4024 3664024
367-4024 3674024 ZCP3564024

 

Why Choose ICS Trailers

Key fitment checks include the 4.5in bolt circle, six-bolt flange and Integrated Sentinel oil configuration. If the old cap is damaged or unreadable, compare the bolt pattern, overall depth and flange diameter before ordering.

  • AP4197 provides the matching gasket for the 4024 mounting pattern.
  • A separate replacement window kit allows the oil-viewing assembly to be serviced when required.

Browse more Axle Parts

Online prices apply to website orders only. In-store pricing may differ.

Related products