Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Despite my best efforts I recently accidentally cut a plug out of a cast-iron wall-style flat radiator and discovered to my displeasure that I had removed one of the left-hand threaded (1-1/2") plugs. Now I know one can find L-R nipples and couplings, but this radiator is located in a niche in the wall just big enough for the radiator and some elbows. There is not enough room for a 4" L-R nipple (let alone the Ugly factor), but I could fit a 1-1/2" x close nipple, if one existed, and a 90. But does one exist? I can't find it. But I assume that's what they use when they assemble the sections of new radiators at the factory - so they do exist somewhere. And I have seen L-R "hex" fittings, but not NPT. I also thought of buying a L-R 4" nipple and cutting and threading it down on a pipe machine, but the logistics don't really work out. So what do the assembled geniuses who read this think?
PS - As a last resort I had wondered if I could bust up an old radiator for the L-R nipple, which ought to be 1-1/2", but that seems like an act of desperation. And of course no one makes a L-R plug either.