Ok, so, i need a pipe that is at least 10″ long, with a coupling that can go on another pipe with fine 5/8″ threads. Would prefer to get this in steel, if at all possible. Does this pipe even exist or do i have to get this sort of thing custom made? I went to lowes and they didnt have anything in the way of black steel pipe. Really dont want to resort to PVC but might consider that an option if it could screw on there easily. Can anyone give me ideas on what i can do? thanks a lot. (this is for a personal project and has nothing to do with plumbing for my house. Needs to stand up to some heat and pressure.)

Thanks!