This model has a 50mm interior height which perfectly fit the Samsung sound bar that I was working with.

The model was designed to fit into the Hisense TVs existing foot mount points. There are two screw holes to secure the bracket to the TV, and two holes in the bottom for your screwdriver to go through.

If you'd like a modification to this for your larger/smaller sound bar, just reach out and I can upload different versions easily enough.

I happened to have the fasteners I used on hand already. Four are needed.
See model images for caliper measurements for what I used.
The thread gap measured 0.6-0.8. Little hard to get the calipers into that small gap.