My son just bought a Vertical Aftershock bike from a local bike swap at his middle school. The model # is 8526-24N. His pedals are coming apart as in one of the nuts holding the cleat bracket fell off and he lost it. I have tried two local fastener suppliers in town and we could not match the thread with anything! Is this a special thread or what?! I got it to thread a little bit onto a 10mm-1.5 but not enough to tighten it up. Please help with this issue as I can find nothing online about this bike.