US Patent 7517181 Track fitting for a cargo security system

A track fitting used to secure a covering to a track extending along an item includes a body and a plunger. The body of the track fitting has at least one foot, adapted to be received in one of a series of openings defined by the track, and the body is also adapted to receive and secure a portion of the covering. The plunger of the track fitting is placed adjacent to and is vertically moveable with respect to the body. The plunger generally moves between a first position that allows movement of the track fitting along the track and a second position in which the plunger engages one of the openings defined by the track, preventing further movement of the track fitting along the track.