2015/23 - ‘T’ shaped article of steel. The external diameter of the shoulders is 23 mm and the largest diameter of the central part of the article is 40 mm. Its lateral endings are bevelled, suitable for butt welding, and its third ending is threaded on the inside. The lateral endings are to be welded in between the panels of the radiator. The third ending is used for installing either a vent valve or a regulating valve, or for connecting the radiator with a pipe that connects it to, for example, a boiler - The Trade Hub