A conveyor chain has a succession of longitudinally succeeding links, a respective entrainment lug projecting transversely outward from each link and formed with a latch seat and a plurality of identical entrainment elements. The entrainment elements each have a transversely outwardly projecting entrainment arm, a transversely inwardly open socket adapted to fit complementarily over a respective one of the lugs, a formation in the socket engageable in the seat of the respective one lug, and a longitudinally extending brace bearing transversely inward on at least one of the lugs adjacent the respective one lug.