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.

STEMCO Stamped Steel grease hub caps are manufactured from 14 gage steel and have a protective yellow chromate plating with a clear lacquer coating for additional protection from corrosion. For synthetic base grease, use the vented 340-5096 version cap. For petroleum base grease, use the non-vented 340-5097 hub cap.

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STEMCO has engineered the P.S.I. hub cap designed to meet the specific performance expectations of each fleet, all in an effort to maximize performance and value.

Commercial trucking can put enormous demands on wheel end components. Built to withstand the harshest conditions, the STEMCO® Defender™ hub cap is made from an ultra-durable, corrosion-free, composite material and is available with a permanently bonded, leak-proof window.

The traditional aluminum series 340 and 343 provide durability with the trademark red plug to allow venting of the hub cap. Using cast aluminum for constructing the hub cap body prevents warpage and provides superior durability and heat-dissipation properties. The trucking industry recognizes STEMCO hub caps as the benchmark.

For grease applications, the 342 series Dirt Exclusion hub caps provide the same 340 casting without a side fill plug, plus a solid window with a sintered metal vent for venting purposes. To further support grease wheel ends, STEMCO developed the 352 series Solid Aluminum hub caps with a duckbill vent inserted in the face of a solid hub cap.

ESP and ESP Plus are STEMCO’s top-of-the-line hub cap plug solutions—protecting lubricant integrity by preventing moisture and other contaminants from entering the hub assembly. Featuring an advanced design and innovative shielding, ESP and ESP Plus are simple, yet vital, ways to maintain wheel end safety.

2005 Ford Focus rear wheel bearingreplacement

2005 Ford Focus wheel bearingreplacement

To further support grease wheel ends, STEMCO developed the 352 series Solid Aluminum hub caps with a duckbill vent inserted in the face of a solid hub cap.