Hello, I bought the Samsung QE55Q8DNATXZG at the end of November 2018, and only the Samsung WMN650M bracket fits it. According to Samsung, this is the only one offered that fits the device. I contacted Samsung and they told me this. I was a bit worried because the device is quite big and whether the holder would really hold it. So far my Samsung has been hanging on the wall for 3 months. It is important that the wall is not made of brick or even worse plaster. If in doubt, get special wall plugs. There are 4 holes on the back of the TV where the plastic sleeves are inserted for mounting, which are fastened with the 4 screws supplied with the TV set (there are 4 screws in the TV box, do not throw them away). In the scope of delivery for the WMN650M wall mount, I used the S-8 screw set (there are several included) because it is the only one that fits in terms of length. But everything is described very well. One more thing: two 4-cornered metal holders about the size of a cigarette box are screwed to the wall where the unit is then hung, and it is also possible to readjust if it is not 100% straight. They have solved this very well.
Greetings Ricardo