i duno but on my luxury sport mc 88, they are fine thread metric. i thought for sure they were 7/16 fine thread, but they are metric.....stupid if u ask me.
they are the equivalent or closest to, 7/16 fine thread...i dont remember off the top of my head what i had to buy...get them at hardware store for about 10 cents each......auto parts are gonna be $1 each.