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For my set up I used the shorter M8 screw. My box did not have any mounting screws so I purchased some at Menards.
Sorry, there was a problem. Please try again later.M8 refers to the metric width for the VESA Standard screw of 8 mm that will fit into the VESA Mounting bolt holes in the back of the LG 70 Inch Class 4K HDR Smart LED TV w/ AI ThinQ® (69.5'' Diag), Model # 70UM6970PUA. "L" will be the length of the screw. The length is not given because it will vary depending on the depth of the wall mount you use to mount the TV. VESA Compliant Wall Mounts do not have the same depth. If you need the length for a current wall mount, if you still have the installation guide for it, check it to see what length is required for the wall mount. You can also contact the manufacturer to as what length it requires or measure the depth. If you are purchasing a new wall mount, it will come with 2-3 VESA standard screws of varying length with spacers that you can use if the screws are too long...^IFV
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