Abstract: A conveyor chain articulatable in two planes transversely of each other and normal to the direction of chain advancement. The chain has alternating link types. Alternate drive links have a body center defining a center aperture for receiving the cog of a sprocket wheel in driven relation and have end hooks portions which curve transversely toward the body center in spaced relation. Alternate attachment links have a perimeter body defining toroidal outer loops for removably engaging the hook portions of adjacent drive links and have a center section for engaging a transversely extending conveyor flight.