Pipe Clamp / Bracket
by TechEd, published
Used these to mount a beach umbrella in my boat. As designed they fit a 7/16" diameter shaft.
Printed at 100% fill on a MakerBot Replicator. I am sure there is something at the hardware store that would have worked but I wanted to try a "thing" project from start to finish. I used tapered screws and got some cracking. I think a round head screw would have worked better.