Who Knows Correct Screw Size for Tail Light & Reverse Plastic Lenses?

I recognize them now that I see the photos (but can't find them here in the garage anywhere). It looks to me like #9 may be one or two sizes too big (thread diameter wise).

Evidently they measure 3/8" long with the screw head diameter of 5/16". The major thread diameter could be 11/64", 10/64" (which is 5/32"), or 9/64".

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