That should be fine. Older sony LCD TVs used a much longer extension on the upper holes when wall-mounting and it wasn't an issue.Looking for some advice on attaching a bracket to my Samsung. The holes are recessed and I had to use 1 really long washer and a small one so there is no gap. I’m using the M8 screw. Is it safe to have the screws out this long? Picture attached.
The important thing is that the screw should have at least 5-6 turns of thread engagement regardless of what the screw passes through on the way to the TV.