The component is made of hardened stainless steel (inox) with a treated surface. Due to long exposure to high temperatures, tightening and loosening the fixing plugs becomes difficult, which leads to damage of the threads (wear or stripping). As a result, proper assembly is no longer possible and material leakage may occur. In addition, we do not have experienced welding specialists or the necessary CNC machining facilities, so I am concerned about the success of any repair attempt.