This is a replacement part for a wood pedestal table.  It joins the table top to the foot.  It is designed for #8-5/8 wood screws and ¼-20 T nut.  

The post-mount.stl file provides for 5/16 " protrusion into the wood of the table top.

The T-nut can be tapped into place like you would do for wood.

The pedestal-table-post-mount.scad file lets you adjust parameters for a different circular pattern of the screws, larger T-nuts or the overall size of the mount.  

The part has a 15% gyroid infill everywhere but the center where the T-nut is installed.  There it is filled to 40% - see the 3mf file.

The prototype is in pink PLA, while the final piece is printed in copper, which is closer to the wood finish.