It is a screwed GPU stabilizer, which is countered with a nut.

There are two different sizes: large (dimensions: min: 85mm; max: 140mm) and small (dimensions: min: 55mm; max: 79mm).

For a perfect fit, you need to scale the pod and the nut up by 3% in the x and y directions and down by 3% for the screw.

The nut is universal and can be used for both versions.

I would recommend printing it in PETG or ABS because of the high temperatures inside your case. But PLA works fine for me.

Recommendations:

Material: PETG or ABS

Printing: Brim for the large screw and pod

Temperature: Extruder: 215°C

Bed: 60°C