A simpler way to check things out is to compare Metric as European vs. Japanese.
I once had a Volvo, which of course had European threads on their metric bolts.
My next car was a Subaru, which had Japanese metric hardware.
I found that the least costly source of Japanese hardware was a Honda motorcycle shop, as compared to a Japanese car dealer. This was in the late 1970s in Alaska, but introduced me to the two systems.
Car dealers seemed to have a much higher markup on their metric hardware, as compared to motorcycle dealers. Use above info from previous entry to determine what you should have, and my advice in an attempt to find a local source. Good luck.