There is disclosed a thin torque converter, fluid coupling device mounted on a vehicle. The converter which has a smaller axial dimension than the prior art converter, comprises an outer race, an inner race, a number of sprags mounted between the races, and two thrust washers. The races and the sprags are held between the washers. The sprags are wider than the inner surface of the outer race, but narrower than the outer surface of the outer race. The washers have radial outward portions bent along the side end surfaces of the outer race. Snap rings anchored to the boss of the stator of the converter prevent the washers from coming off.