Question What kind of screw is this? In 3090 FE.

Falkentyne

Distinguished
Sep 22, 2008
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The drill head bit size is Torx T6, but you need to be concerned with several things.

The dimensions /width of the top of the head itself.
The thread pitch size (distance between threads, yes, this matters)
The thread pitch bit width (aka screw hole size)
The thread bit length.
Head shaft thickness (the part above the pitch bit, but below the top of the head
Head shaft length (from top to bottom going to the pitch bit).