Due to increasing commercial pressure, a need arises to arrive at design solutions that lower in weight and as a result carry more pay load. In commercial vehicle segment almost all the functional components are manufactured of metals which add to the total vehicle weight. Thus, an attempt has been made to replace metal cargo body hinges to plastic. With this approach a target of 40% weight reduction was taken. The other benefits of this design will be functional integration of many child parts & removal of metal joining process like bolting & welding to single part resulting in ease of manufacturing, handling & assembly. The hinges made up of plastic will be inherently resistant to corrosion. The metal to plastic conversion has been studied carefully from a technical point of view which includes proper design, analysis under operating loads and manufacturability. Economic feasibility of the conversion has also been considered.