I bought a lot of 6 and 12mm lately for the car but problem is metric sizes have like 3 different pitches on the threads 1.00, 1.25.and 1.5 maybe even more. I have been to the hardware store and specialized fastener shop two and sometimes three times a day so I can't even recall what the pitch was that I used on different bolts. If I wasn't so rushed before Vegas I should have wrote down the sizes and pitch for suspension & misc. other bolts.
If I were to do it again I would buy a metric thread chart/gage. Measure size and pitch needed and just order online from
http://www.mcmaster.comThey have bolts at very attractive prices even compared to closing hardware stores.