From time to time I need to use inserted slide-ins or lugs to attach to things which go onto 2020 aluminium extrusions.
I have designed a generic slide-in lug which is snug fit for the 2020 extrusion. It is customizable to different lengths, Use the .scad file, or remix from the sample .stl file.
I have printed and tested samples printed in PETG which give a very nice snug fit. You can use whatever material and print settings which you want; however with some materials you may need to compensate for shrinkage for good fit.
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