Sentinel<sup>®</sup> Hub Caps
![Three hub caps](https://www.stemco.com/wp-content/uploads/2020/06/HubCapGroup.jpg)
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.
Defender Composite Hub Cap
![Three Defender Hub Caps](https://www.stemco.com/wp-content/uploads/2020/06/defender-hub-cap.jpg)
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.
Voyager<sup>®</sup> Wheel Seal
![Voyager Wheel Seal](https://www.stemco.com/wp-content/uploads/2020/06/voyager-wheel-seal.jpg)
The Voyager® wheel seal is designed for regional route trucks, city traffic and coach applications. Rugged design, simple installation and proven performance make Voyager the right choice for fleets seeking a superior seal for everyday stop-and-go traffic environments.
Guardian<sup>®</sup> HP Hub Seal
![Guardian HP Wheel Seal](https://www.stemco.com/wp-content/uploads/2020/06/guardian-hp-wheel-seal.jpg)
The Guardian® HP incorporates the best features for preventing the leading causes of seal-life degradation – contamination ingress and heat generation.
Zip-Torq<sup>®</sup>
![ZipTorq axel spindle nuts](https://www.stemco.com/wp-content/uploads/2020/06/ziptorq-axle-spindle-nuts.jpg)
With its robust single piece design, Zip-Torq takes the guess work out of bearing adjustment. Zip-Torq is a unitized axle fastener that uses a patented self-locking ratchet system to secure the wheel end and prevent back off. Zip-Torq consistently delivers accurate endplay between .001″–.005″ using the STEMCO 2-1-1 method.
Pro-Torq<sup>®</sup>
![ProTorq axel spindle nuts](https://www.stemco.com/wp-content/uploads/2020/06/protorq-axle-spindle-nuts.jpg)
Increase tire life and reduce seal failure with the Pro-Torq® axle fastener. With bearing adjustment increments down to 0.001″ and exacting cup and cone alignment on the spindle, nothing compares to the precision of Pro-Torq.
Grit Guard<sup>®</sup> Hub Seal
![Grit Guard](https://www.stemco.com/wp-content/uploads/2020/06/grit-guard-hub-seal.jpg)
Engineered for exceptional performance, durability and contaminant exclusion in severe service applications, the STEMCO® Grit Guard® hub seal features a two-piece design that reduces maintenance and unnecessary wear on expensive spindles