Wheel Bearing Dust Cap, No Speedometer Hole, Link Pin

This cap prevents dirt and moisture from getting into your front wheel bearings, which can lead to premature failure.  They are available with or without the hole for the speedometer cable.  The link pin style aps have no flange where it enters the drum.  The ball joint style caps have a flange on the bottom.  Note that some aftermarket link pin front disc brake kits require the ball joint style caps.