Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4385153.
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Retaining ring / nut for KitchenAid stand mixer attachment, Food Grinder (FGA-2).
Depending on the tolerances of your printer, it may be necessary to increase the size by a few percent... the threads work great but can get a tight towards the end of the travel.
Printed in PLA, but PETG might be a better choice.
Be advised that while PLA and PETG are both "food safe" plastics, it is the method of manufacturing (FDM printing), that may not be because of microscopic pores in the surface that food or bacteria could be become lodged.
Use at your own risk and judgement.
Reminder: PLA is NOT a dishwasher safe plastic.