A:Answer Monitor mount on rear case uses 75mm VESA pattern. I recently mounted monitor on an articulating arm. Mounting screws are metric M4 (not M6 or M8), and should be turned into monitor case three revolutions. My kit came with 5mm and 10mm spacers, I used the 5mm to avoid turning screws too deeply into monitor. M4 screws come in several lengths: 4mm, 5.4mm and 7.4mm. Don't use SAE screws, use metric (screws and maybe spacers should come with whatever mount you are installing).