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Followup:
Turns out the captive nut for the bolt that came loose a couple of weeks ago was stripped. Fortunately the nut was still in place.
My car had 5 of the shock bolts replaced with metric 10 x 1.5 bolts which never came loose.
Was able to tap the hole for metric with the shock in place. The hole in the shock is a pretty good guide for the tap:

Used a short 1/4" extension as an extension for the tap.
Comparison between the bolts:

Did not yet loctite this in place, but will keep an eye on it.
Turns out the captive nut for the bolt that came loose a couple of weeks ago was stripped. Fortunately the nut was still in place.
My car had 5 of the shock bolts replaced with metric 10 x 1.5 bolts which never came loose.
Was able to tap the hole for metric with the shock in place. The hole in the shock is a pretty good guide for the tap:

Used a short 1/4" extension as an extension for the tap.
Comparison between the bolts:

Did not yet loctite this in place, but will keep an eye on it.