A lock assembly for a container having an opening defined by a door jamb, a cargo door adapted to close the opening, a rod linearly moveable to engage the door jamb, and a latch mountable to the rod. The assembly includes a casing having an inclined opening and mounted to the cargo door parallel the rod. The casing includes a protrusion changeable between an extended and a retracted position. A latch receiving means has an inclined opening adapted to align with the inclined opening of the casing for accepting the latch therein. The latch receiving means is responsive to movement of the latch within the casing between a locked and an unlocked condition and engages the locking means when the latch receiving means is in the locked condition. The rod is moved by the latch to engage and disengage the door jamb.