A railcar hatch cover assembly having a cover, a latch engaging structure, a latch coupled to the cover, and a handle coupled to the latch. The handle is configured to be grasped by an operator. When a substantially vertical force is applied to the handle, it moves the latch from a latched position to an unlatched position and moves the cover from a closed position to an open position. When the cover is dropped from the open position to the closed position, the latch contacts the latch engaging structure and moves from the unlatched position to the latched position. A railcar latch assembly having a latch coupled to the cover and a handle coupled to the latch. The latch has an arcuate bottom surface that contacts the latch engaging structure to move the latch from an unlatched position to a latched position.