I want to make a height adjustable stool, like a piano stool, of the simple screw/rotate type, but I don't have a lathe (or anything like enough skill) to turn a thread in wood myself.
Is there anywhere I could obtain a length of threaded wood of a large enough diameter ready made? Alternatively, if Wood is too hard to obtain (I've only seen a few examples with wooden screws) a metal equivalent would be OK.
Also, what should I be searching for? (Name), typing "wood screw" into Google obviously isn't going to work).
I'm in the UK, but a USA source would be OK too (I have relatives who could accept a delivery stateside)