Quote Originally Posted by djsilver View Post
It's ISO spec vs. DIN spec. DIN is Deustch-something and uses the 11-13-15 etc heads. Japanese mostly use ISO spec 10-12-14 heads. If you purchase online check to verify which spec and you'll get the right hex sizes. Now if someone could give me a good explanation for why Ford decided to use 18mm hex heads on most of their suspension parts (?) Have you ever seen a metric tool kit that came with it? I had to buy individual wrenches and sockets. Never seen an 18 on anything else, german, japanese, italian, etc. I've yet to find an 18 anywhere on my Nissan.....,
Bmw's tend to use a lot of 16mm on the suspension parts. As for a source, Mcmaster-carr and fastenal are two sources I've used and order from.