1. Central Hanger bracket and equalizer for tandem suspension, used in trucks, trailers and semi-trailers, comprising: an equalizer with the upper part of the body provided with an area in a convex or flat shape, being also provided with a retaining device located in the middle area of the side walls; and a hanger bracket provided with flat or convex area, arranged on the upper middle portion, being also provided with a cylindrical pin, being this cylindrical pin fixed transversely in the middle area; said upper part of the equalizer body and flat or convex areas of the hanger bracket supporting each other to allow the articulation and/or vertical inclination of the equalizer relative the central bracket for the distribution of load between the axles; and said cylindrical pin fixed transversely in the middle area of hanger bracket, when in contact with the retaining device located in the middle area of the side walls of the equalizer, limits the lower vertical displacement and the longitudinal displacement of the equalizer relative to the central hanger bracket.