Hub Caps

Sentinel® Hub Caps

Sentinel® Hub Caps provide an unmatched filtering system to eliminate contamination from dirt, dust, sand and water, making it easy to visually monitor lube levels. Featuring an innovative design and durable construction, Sentinel hub caps help extend equipment life and increase profitability.

Three hub caps


Provides a tamper-proof hub cap system for maximum protection and maintenance-free performance.

Allows Sentinel Technology to be retrofitted on existing wheel ends with replacement hub cap plugs, or on drive axles with the STEMCO DAV Drive Axle Vent system.

The only waterproof hub cap in the industry.

Order OEM or retrofit in the aftermarket on a trailer, drive or steer axle.

STEMCO Defender™ hub caps with Sentinel Technology are made from composite materials with stainless steel reinforcement inserts that will not corrode.

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Has Prerequisite
A man applying grit guard to a wheel end

TQM Wheel End Part 2 – Grit Guard® Installation

Requires TQM Wheel End Training Part 1

Has Prerequisite
A man installing a Guardian HP Wheel Seal

TQM Wheel End Part 2 – Guardian® HP Installation

Requires TQM Wheel End Training Part 1

Has Prerequisite
a man in front of an unassembled wheel bearing

TQM Wheel End Part 2 – Discover®/Voyager® Installation

Requires TQM Wheel End Training Part 1