Installing Dimming mirror - lost my darn mirror mount screw

[Butterscotch]

Do you have a tap and die set with a guage ?? Just get the thread details and head to the hardware store. You can adjust the lenght by using a toothpick into the whole until it touches.
Good luck. Look into purchasing a magnetic mat to put thing on.

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[blarson]

No tap and die. Ironically it was probably a magnet that did me in. Either on my phone case or on the light I was using. The mat would have only saved me if it was stronger. But good point, next time use it even if for one screw.

 

[blarson]

On a Kia KA7062ADUP1 dimming rearview mirror it has a 10-24 x 3/8" pointed tip torx screw.

blueSpec thanks for taking the time to test them all and posting. The winner is 10x24 3/8.
I may still go to the junkyard one day to get the proper screw cuz none of these have the pointed tip but I put it in and it's holding the mirror steady. Much appreciated!

Thanks everyone else who chimed in with useful suggestions and humor. All was appreciated!

 

[KO Stradivarius]

Did anyone ever establish the Ford part number for the screw? We can probably learn some things from it. I'm thinking that since it is a #10-24 size, it may be a common legacy part that has been used on multiple Ford models, since most new fasteners that are released are metric. And if so, you may have an easier time finding it in the junkyard since many models will use the same part.

I personally searched around myself for about an hour the other day trying to find an exploded view with the screw part number, but it is hard to find for some reason. It seems like it used to be easier to find these assy diagrams in the past. I bet a guy at a Parts counter in a dealership could find it. They have access to them.

The best diagram that I found online showed the mirror serviced as part of the Windshield system. But it did not show the screw. As a former Ford engineer, this doesn't make sense. I can see the metal casting piece that is bonded to the glass being in the W/shield system because it is released as an assembly with the glass that arrives at the plant as an "end item", and some Glass engr has to put his name on it. But the mirror and attaching bolt are released by a Mirror engineer (not a glass engr) and it should be in a Mirror CPSC subsystem. So I just think the info online is sparse and it may not be practical to find. But this question has an answer!

(RABBIT HOLE)
Fastener numbers with 6 digit numbers (like 383845-S) with no letter prefix are really old, but they do exist.
If they have an "N" prefix (like N606765-S300) these are the NAAO series of commonized fasteners from like the 1990's, early 2000's or so.
A "W" prefix (like W987645-S) is most common on new designs.
Some less common fasteners will have a full unique Ford part number with Prefix-Base-Suffix (P/B/S) format (like F6TB-16005-AA, which is a Frt Fender p/no IIRC) if they are not planned to be reused, but this is frowned upon.

The suffix gives the finish (except if it is P/B/S), S=plain (no finish), and S300 also means plain. Other numbers correspond to different platings/coatings. You need the decoder ring to figure out the finishes, but they don't change the part geometry.

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