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Helllo,
I have to design a part that will have screws that can be taken apart with a T9 Torx Screwdriver. These are the screws that are taken apart first thing here. What is the thread diameter of the screw that mates with the T9 torx screw in the Metric System?

On this website they mention "point-to-point" dimensions. But I am unable to understand what that refers to.

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Torx defines the head only, it can be used on metric or SAE screw sizes.

According to wiki, the point-to-point distance is the "diameter of circle circumscribed on the cross-section of the tip of the screw driver."

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