CheeMuii 4 Pack 343-4009 Trailer Hub Caps with Oil Window Cover Kit

Premium hub cap upgrade for trailer axles

CheeMuii presents a thoughtful hub cap and oil window cover kit designed to protect your trailer wheels while simplifying maintenance. Die-cast from lightweight aluminum, these caps offer a polished finish that resists road grime and weathering, pairing durability with a clean look. The set includes the cap, gasket, window cover, and plugs, all crafted to fit standard trailer hubs while maintaining a tidy, low-profile appearance.

See inside at a glance with the oil window

The high-strength transparent oil window lets you quickly assess hub oil condition without disassembly. This visibility supports timely maintenance decisions during routine stops or inspections, helping you plan top-offs or service before levels become critical. It’s a practical touch for on-the-road upkeep and peace of mind.

Secure sealing, leak resistance, and venting

The design uses OEM-style gaskets and leak-proof plugs to minimize seepage and keep the hub area clean. A vent hole in the plug helps relieve pressure, reducing the chance of bubbles or drips while your trailer is in use, even in changing weather conditions.

What’s included and how it fits

• Four aluminum hub caps with gaskets and plugs
• Four window covers to protect the oil window
• Eight extra plugs for replacements
• Technical fit: bolt hole spacing 5-1/2 inches; bolt size 5/16 inch; height 2-11/16 inches; inside depth 1-15/16 inches; flange outer diameter 6-1/4 inches; flange inner diameter 4-3/8 inches

Replacement compatibility and versatility

Designed to replace Stemco 343-4009 and related OEM numbers, the kit also supports various parts across GMC/Volvo, Spicer-Dana, Eaton, National, and other brands. This adaptability can simplify sourcing while keeping your hubs protected and functional.

Usage tips and overall value

For best results, ensure clean mating surfaces before installation and replace gaskets if needed. Keep spare plugs handy for quick roadside maintenance. CheeMuii focuses on practical, durable components that support straightforward maintenance and a tidy hub presentation without overpromising results.