threaded pipe for clamp

[Wild Turkey]

I've seen clamps -- I think I got some "Kobalt" from Lowes that used the same "grabbers" for both sliding and crank ends so no threads needed.

[R Clark]

Very true, but having several with threads at both ends permits "s t r e t c h i n g" the clamps with couplings if necessary

+1.  I'd rather have four five-foot clamps that can be easily converted to two 10-footers in the rare instance that I need uber-long clamps.  That was the situation once in my shop.

[toolmiser]

Got a friend with a pipe die, it's pretty easy to thread them.