Bifold Closet Door Bottom Pivot Screw
thingiverse
This is a 1/2" screw style bottom pivot for a bifold closet door. The kind that fit in a toothed track. At 6g of PLA it is likely cheaper than most pivots purchased in store or online. It is currently working in my closet door (although rarely used), so I'm not able to confirm if it will be as robust as a metal/plastic combo from the store ... at least not yet. The sleeve is quite a tight fit (I hammered mine in), so you may want to consider sanding it down (although not necessary).
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