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I lost the 4 Torq (T15) screws that hold together the case for a Mac SE/30.

Does anyone know the size and the groove spacing to order a compatible one?

I found these on eBay, but I'm not sure about the winding spacing, (x10pcs) M5 x 25mm, Black, Button, Torx, Socket, Screw, ~ 10.9, T15, 5mm.

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2 Answers 2

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The rear case cover screws are part number 426-1007 for the top two screws ("Screw, Tap, M 4.22 x 1.41 x 16, Torx, Zinc") and 435-5002 for the bottom two ("Screw, Tap, 8-32 x .625, Torx, Blk Zinc Oxide"), per SE/30 exploded diagram and parts list entries. An #8-32 is a standard diameter and thread spacing of screw that is common in computer case screws, but I can't parse that description of the other one.

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    "M 4.22 x 1.41 x 16" looks like the notation for a metric screw thread of 4.22mm outer diameter, 1.41mm pitch, 16mm long -- but that's very much not a standard metric thread. It might be a metric description of a #8-18 UTS screw, but that's also very much not a standard size.
    – Mark
    Apr 4, 2019 at 1:45
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    English-standard wood screws #8 or #6 have about the right diameter, the first specification isn't for a machine-screw thread.
    – Whit3rd
    Dec 29, 2019 at 3:03
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If you don't want to be as original as possible, you can use any two M4-sized (Metric) screws for the lower two holes and search a box of assorted self-tapping screws by probing the holes of the front cover without back for proper fitting.

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