Abstract: Ball screw nut includes first and second ball bearing accommodating inserts that can be part of a ball bearing return system in the nut with the first and/or second inserts having a body with a passage for ball bearings, which opens in a first direction; and a depending foot having a heel and toe, which joins the body and which has below the body in the toe of the foot for the ball bearings a channel that faces in a second direction substantially perpendicular to the first direction and that can communicate ball bearings with the passage in the body to or from a spiral raceway of the nut and an associated ball screw shaft.