This is a dishwasher nut that holds the salt container in place. Unfortunately, I do not remember the exact model of the machine, but I guess it would fit a lot of models.

Check out my other designs:
https://www.thingiverse.com/mario1142/designs

FLSUN QQ

No

Yes

0.2

100%

The printing infill is 100% so that the empty spaces in the nut wouldn't fill with water during operation.
The material must be resistant to high temperatures (in my case ABS).