ball nut

An endcap return ballnut employs a cap on the end of ball nut.

The balls recirculate from one end of the ball nut to the other through ball return guides.

The sole species is Floydia praealta and is commonly known as the ball nut or possum nut.

America's Funniest Home Videos isn't just a showcase for outstanding achievements in Wiffle ball nut shots and heart-attack-inducing Halloween pranks.

Punna' is the Malayalam term for Ball Nut tree ([Calophyllum inophyllum]), and 'Vely' means 'fence'.

As you can see in the photos provided on this page (click on the photos to enlarge), It actually connects onto the tow hitch and also wraps around under the ball nut.

If the ball nut did not have a return mechanism the balls would fall out of the end of the ball nut when they reached the end of the nut.