This bracket is designed to attach a S.I.R.S. Navigator compass to the left front tube in a Piper PA-18 Super Cub, well separated from magnetic materials.
Designed it for ordinary M4 screws/nut as that's what I had at hand.
First print was made in PLA, but it softened during a hot summer day.
Now printed in Taulman Bridge Nylon, which has much higher Tg.
The author marked this model as their own original creation.