Stemco 359-5990 Red Vented Hub Cap Plug 1-1/8 Inch Diameter

The Stemco 359-5990 is a red rubber vented plug designed for use in heavy-duty wheel hub systems. This essential wheel-end component provides proper ventilation for hub caps, allowing pressure release and preventing the buildup of gases within the enclosed hub area.

Key Features:

• 1-1/8 inch diameter fits Stemco aluminum oil hub caps including model 300-4009 and other select caps
• Red rubber construction with sealant coating to enhance sealing effectiveness
• Vented design allows proper airflow while maintaining hub cap integrity
• Commonly used on Dexter 22.5K-27.5K air brake axles and other heavy-duty applications
• Meets or exceeds OEM specifications for reliable performance
• Compatible with commercial trucks, semi-trailers, and heavy-duty vehicles

Wheel hub caps, seals, and bearings work together as a complete system to protect critical wheel-end components. Regular inspection and replacement of hub cap plugs during routine maintenance helps ensure proper ventilation, prevents contamination, and extends the life of the entire wheel-end assembly.