I am going to switch out my quill stem for an adjustable quill stem. It looks like I have to make sure of the type of stem, the stem diameter, and the bar clamp for the handle bars.

I think I have a threaded (no spacers, cap over a lock nut and the quill with wedge in the tube)
The diameter of the current stem is 1"
The handlebar diameter is 1 inch

So I should get a 1" (25.4mm) adjustable quill with a 1" (25.4mm) bar clamp?