What is the recommended way to hold threaded galvanised steel rod in a
vise so that the thread is not damaged?
The rod needs to be cut with a hacksaw. Actually it will be cut in a
metal bandsaw, but it's the same question as the bandsaw also has a
vise.

I believe I have invented the best way, but I was wondering if there
was a "proper" way that a perfectionist engineer might use.