Can you buy lengths of round steel which is threaded down the middle?

ie the opposite to threaded rod.

i know that i could use steel and drill and tap it, but dont have a pillar drill etc...

Can't say that i've ever seen any.

In the Heating and Ventialtion industry they do have Sockets for joining screwed rod together when holding up pipes and ductwork etc if your just trying to extend a piece?

Have to extend my wing stays sideways, on wee pillars.
I was going to weld pillars to the stay plate, then bolt through the upright into the pillar....

Like this?


Image deleted by owner

(yes, I know its not round!)

[Edited on 25/5/06 by Mad Dave]

Local machine shop should knock you up what you want for peanuts. Or as you already said just weld a piece of tube in as a spacer.
Mac

Dave, thats the very thing...

where to buy?

You can buy a "long nut", 1" or so long, tapped M8 or M10, from any electrical wholesalers like CEF.

And yes they are called long nuts.

Saw the same in Wickes DIY in the roofing accesories section. M8 M12 possible M10 along with lengths of threaded rod. Probably not high tensile.

[Edited on 25/5/06 by Dusty]

You can also get similar things called "standoffs" used in the PC market. Somewhere like Maplin/RS/CPC should do them. They only have an m3 thread though - not sure if thats to small for you?

how long and what thread?

you can buy (well, my local fastener shop sells them) stud connectors; bascially a hex tube that is threaded inside for joining up studs, as per your description.