Knob for 1/4-20 nut
thingiverse
A basic knob that matches some commercial knobs I already have on hand is all I need. It accepts a 1/4-20 nut (11mm OD) which will press fit into place without needing any heat applied. I printed the knob with a gyroid infill pattern for added strength in both the X and Y directions, although it's not really necessary to do so.
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