JGAurora A5 M3 Bed Knob

Layer High: 1.6mm
Layer Width: 0.5mm
Speed: 50mm
Infill: 100%

I also included a bit smaller version, because some of JGAurora5 are not symetric and the bed is more on the left or the right side, if the main print touches the body of the printer you can print smaller one.

Use Prusa Slicer because of Infill, since S3D cannot detect the infill position.

If you cant find M3 Nut just Split models and resize the one which is inside.