Stock spring center pin bolts are M8x1.25 with 12mm head. That's JIS. Aftermarket are whatever.
Edit: Should have paid closer attention to the original post: The spring end pin bolts are also M8 x 1.25 with 12mm head JIS. IIRC stock is about 25mm long. In that applicatiob DIN/ISO will also work, as there is plenty of clearance for the 13mm heads. Also in that application, in my experience, those bolts don't matter to get you home :-)
Last edited by Rzeppa; 02-02-2006 at 11:39 PM.