I'm working on a design for my own plow/rabbet plane with a steel skate, because I like a challenge. The fence will be wood. The skate and fence will slide on a pair of steel rods (which I can order on ebay), but I need some sort of steel through-hole fastener, ideally one that is tightenable. What should I use for this purpose?
For example, the Veritas plough plane has these fasteners:
The "arms" tighten when the brass thumb screw goes onto the threads. In the Veritas case, the "through-hole" part is probably covered by a machined hole in the steel fence itself. In my case, I need a metal fastener with an unthreaded hole which I can epoxy into the wooden fence, checking for square before the glue sets. Ideally, it would also have a small threaded hole on the top for a thumb screw (for locking the rod into place). I could also drill that myself.
I'm also happy for suggestions on other ways to do this.