An Overhead Monorail Conveyor (OHM) consists of a system of trolleys that hang from a structural "I" track supported by overhead steel structures. The trolleys are linked together and driven by a drop forged X-458 or X-678 chain. Loads are suspended from attachments that are bolted directly to the trolley brackets. Different carrier, hook, and tray arrangements are specifically design and fabricated to suit the parts being transported.