A washer/extractor having a one-piece plastic water hose connecting fitting having a base plate, a tubular hose connection portion that defines a passageway communicating between a hose connected to the fitting and an opening in the wall to which the fitting is mounted, and a pair of clamping members disposed in parallel relation to a rear side of base plate. The wash tub opening has a key hole configuration which enables the arms of the fitting to be positioned into the opening in a first position of the base and upon rotation of the base plate to a second position locates the clamping arms behind mounting portions of the wall for securement by respective fasteners extending through the base plate, wall mounting portions, and clamping arms.