I have an old steam radiator circa 1950. It is in good condition. When moving it the other day I noticed the nut that connects it to the angle valve, the nut had cracked. I will need to replace it somehow. I looked for this nut online but I am not sure on the proper name for it and how to go about replacing it. It appears to be attached by loosely by some sort of nipple with a flared end.
Any idea on what parts will need to be replaced and the best way to go about it?