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340-4009

HUB CAP 6 HOLE

The Stemco 340-4009 is a replacement hub cap for heavy-duty truck and trailer axles. It is a cast aluminum cap with a 6-bolt mounting pattern, 5-1/2 inch bolt circle, and 6-1/4 inch flange outer diameter, designed to seal the wheel hub and retain hub oil or grease. Replacement is needed when the cap is damaged, leaking, or the sight window is cracked. This cap works with gasket 330-3009 and window kit 359-5995.