I needed hook to hang bags or tools to my aluminum ladders. Ladder tube is rectangle profile roughly 19x40mm.
Hook is made to simply snap on the side of ladder tube. It is not meant to hold substantial height but it can do well for what I need it.
There are two models, one solid and one using less material. Solid one can hold larger weight.
Download models
https://www.printables.com/model/460131-aluminum-ladder-hook
https://www.thingiverse.com/thing:5985486 […]
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Knob adapter to 1/4″-20 photo nut. Uses metallic nut easily available, version that has wire hook. Wire hook is removed and only nut body is used.
Prints in two parts that fit together and need to be glued after metallic nut is inserted.
When inserting metallic nut into plastic cap, pay attention that nut has two side holes left after wire is removed and cap has two small bumps that should snap into those holes. align them.
This allows you to have metallic screw with nice and practical plastic knob.
Download model from:
https://www.thingiverse.com/thing:5441548
https://www.printables.com/model/268778-knob-adapter-for-metalic-14-20-photo-nut-screw
Check how it is printed:
