Outlet for underfloor and concealed installations

An outlet for insertion into a tubular opening for underfloor and concealed installations, which includes a tubular body having one end formed with a peripheral conical surface diverging in the direction toward the opposite end and converging toward the axis of said tubular body in the opposite direction, a split clamping ring in engagement with said conical surface and formed with a radially extending periphery having a greater diameter than the diameter of said tubular body, radially inwardly extending overlying formations on said tubular body and said split clamping ring normally spaced apart in the normal condition of said ring, and means to draw said extensions toward each other to move said split ring on said conical surface toward said opposite end and expand said split ring, so that said ring will engage the wall of a tubular opening in which said tubular body is inserted, with said tubular body adjustable both axially and angularly to conform to the surface of the structure in which said tubular opening is provided.