Abstract: A lock for releasably locking a movable hatch to a counterpart is equipped with a fitting (1) having a locking assembly (21) and an additional fitting (2) having an additional locking assembly (28) that can be brought into engagement with the locking assembly (21) of the other fitting (1). The fittings (1, 2) are made of plastic and an elastically deformable compensating cushion (7) is present, which is fastened to one fitting (1, 2) and which when the fittings (1, 2) are in the locked position is disposed deformed between the fittings (1, 2) such that it exerts a bias on them (1, 2). The inventive lock is therefore light but strong and compensates tolerances.