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(888) 312-8812 Login SignupThe RevHD Trailer Axle Hub Cap Kit is configured for 4009-pattern trailer axle hubs used in oil-lubricated wheel ends. It provides a transparent viewing window to monitor lubricant level without removing the cap. The assembly includes the hub cap, gasket, mounting hardware, and fill plug to support complete installation on compatible trailer axles. Its metal housing secures against the hub flange to maintain a controlled seal under highway vibration. The RevHD RHO-T03 axle hub cap kit supports proper oil retention and inspection within commercial trailer wheel end systems.
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