A:Answer The metric measurement for the width of the Phillips pan head machine screws that will fit into the VESA Mount bolt holes on the back of the LG 65 inch Class 4K Smart UHD TV (64.5'' Diag), Model # 65UM6900PUA are 6 mm (i.e. M6). The length for the screws is determined by the depth of the wall mount that you intend to use to mount the TV. Wall Mount typically come with 2-3 sets of appropriately sized screws of varying lengths with spacers that can be used if the screws are too long. If you are purchasing a new wall mount, it will come with the necessary screws. If you are looking to replace screws for an existing wall mount, it should have come with an installation guide that lists the width and length for the screws that were included accessories with the wall mount. If you have lost that guide, you can either measure the depth of the wall mount to determine what length you need or contact its manufacturer. The wall mount must support the VESA Wall Mount Interface Pattern of 300 x 300 mm that is supported on the TV...^IFV
