Abstract: An improved engineering steel conveyor chain capable of supporting a downward load as the chain moves along a horizontal path is disclosed. The conveyor chain includes a plurality of interconnected link assemblies. The link assemblies include spaced parallel metal side bars and a plurality of roller assemblies mounted for rotation between the metal side bars. Each of the roller assemblies include an outer metal roller and an inner plastic bushing. The plastic bushing has a compressive strength between 20,000 and 25,000 psi and includes protuberances at its ends for restricting engagement of the outer metal roller with the side bars. The plastic bushing includes an inner lubricous surface thereby eliminating the need for supplemental lubrication.