A fitting for rotatably supporting a closing element for closing an opening, the fitting including a flange, a clamping element for fixing the closing element to the flange, and a pair of arms extending in parallel from the flange and forming an intermediate space therebetween. Each arm extends to a sleeve which can receive the axle therethrough. The flange, the arms, and the sleeves forming a single piece. A ring received between the sleeves can be secured to the axle.