I recently demo'd a bathroom that was using a "rustic farmhouse" galvanized shelving unit. I took this unit off and was hoping to re-install. Ideally, the elbows would thread in so when they are tight, they are exactly 90-degrees upright, making the shelf level (pic 1 + 2). The problem is... they don't. If I tighten them to the point where they would support any weight (pic 3 + 4), they are going in complete opposite directions and will not work.
It used to be 90 degrees.... I can't figure out for the life of me how they did it.
Is there some sort of discrete nut or washer or something I can use to tighten these and still determine the angle? Am I using a glue/adhesive of some sort? What's the trick here?