Jonathan Fleming the issue with the screw dimensions is that iFixit follows that bad example Apple has started. The screw length is the one that is listed but not the threat size. So 3.9mm (actually Apple used 3.5mm screws for that) is the length only. The screw is Apple part number 922-8974 and it is a M1.6x0.35mmx3.5mm (obviously metric).
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Jonathan Fleming the issue with the screw dimensions is that iFixit follows that bad example Apple has started. The screw length is the one that is listed but not the threat size. So 3.9mm (actually Apple used 3.5mm screws for that) is the length only. The screw is Apple part number 922-8974 and it is a M1.6x0.35mmx3.5mm (obviously metric and 0.35mm is the pitch).
Jonathan Fleming the issue with the screw dimensions is that iFixit follows that bad example Apple has started. The screw length is the one that is listed but not the threat size. So 3.9mm (actually Apple used 3.5mm screws for that) is the length only. The screw is Apple part number 922-8974 and it is a M1.6x0.35mmx3.5mm (obviously metric).