must go at least 9 mm in but at most 10 mm in, and the hole might not be deeper than 12 mm. Details of variant B to E Notes for centre mounts The mounting pattern must be centred between left and right of the screen case. For part D and E, it must also be centred between top and bottom (since 2006). Notes for the edge mounts: x is "T", "B", "R" or "L" for "Top", "Bottom", "Right" or "Left" as seen from the back in landscape mode. More than one x or "C" can be specified for a screen with more than one set of mounting holes. For left or right edge mounting, Swap width and height, so the brackets will look the same with respect to all 4 edges. The rounded rectangles and distances (see below) do not apply towards the edge, except that the surface on the screen need not touch the bracket beyond them. The distance from the edge of the screen case to the centre of the first holes is ±0.5 mm. Common notes for variants B to E Screws are standard M4 machine screws as long as the bracket is thick plus the length given in table 1. Each hole must be within ±0.25 mm of its nominal position. Each hole in the bracket is 5 mm in diameter to allow for this tolerance in both screen and bracket. If the screen manufacturer included different screws, they must be used, not the ones that came with the bracket. If the screen manufacturer provides their own mount, it may be attached in any way as long as it can be removed. The clearance area must be a completely flat surface at most "max. clearance" above or below the general back surface of the screen. The clearance area is a rounded rectangle whose sides extends at least 8.5 mm beyond the hole centres and with a corner radius of at most 7 mm. The bracket is within a rounded rectangle whose sides extend at most 7.5 mm beyond the hole centres and with a corner radius of at least 6 mm. The part of the bracket laying against the clearance area must be at least 12.5 mm wide, it may be straight or diagonal. The two extra holes in type E brackets are in the middle of the long sides of the hole pattern, see