Samsung QE55Q67AAUXXH: Correct Screw Size for Wall Mounting?

Hello, I own a Samsung QE55Q67AAUXXH television. I have purchased a bracket for it, however I am not sure if the included screws will be suitable. According to me, these M8x20 should fit, but I'm doing something like this for the first time and don't want to break something through my own ignorance. Or should I buy others (smaller?) If so, please send me a link to something suitable. I am attaching pictures:

Assembly instructions from TV
.


Handle instructions


TV model

Swooniak wrote:

however, I am not sure if the included screws will be suitable.

.
Why would they include unsuitable ones. Measure the thread depth of the TV and compare with the length of the screws. If the depth + thickness of the bracket is at least slightly greater than the length of the screws then they are suitable. A matchstick, toothpick or other thin object of a few centimetres in length will suffice as a measure for comparison.

Hi. It is important what kind of wall this TV will be hung on.(plasterboard,brick, hollow block, thickness of plaster).

First of all, thanks for your replies! I am already updating the information.

DiZMar wrote:

Swooniak wrote:

however, I'm not sure if the included screws will be suitable.

.
Why would they include unsuitable ones. Measure the thread depth of the TV and compare with the length of the screws. If the depth thickness of the bracket is at least slightly greater than the length of the screws then they are suitable. A matchstick, toothpick or other thin object of a few centimeters in length will suffice as a measure for comparison.

It says in the offer description that not all TVs have the correct screws. So when installed, the screw is supposed to be slightly larger than the thread depth?
I tried mounting the rail with M8x20 screws and it looks like this:

.

As for me ok, but not sure.
The top screw is fine, but at the bottom the rail moves slightly sideways. Is it supposed to look like this? Or do I just not need the washer on the lower one?

lechm56 wrote:

Hello. It is important what kind of wall this TV is going to be hung on.(plasterboard, brick, hollow block, thickness of plaster).

.

Hollow block, but the thickness of the plaster I will not specify, I have no idea.