Abstract: A fluid-operated brake embodying a pressurized fluid chamber with a single supply and bleed fitting is provided. The pressurized fluid chamber can be a wheel cylinder of a drum brake or a caliper housing of a disc brake, by way of example. The chamber has a single port therein in which a fitting is mounted, the fitting being designed to supply fluid under pressure to the chamber and to bleed gas, commonly air, from the chamber. With only a single opening for the chamber, one boss can be eliminated to save weight, and machining of that boss is also eliminated to save costs. The single opening also achieves greater flexibility in design options.