I'm possibly looking to replace some of the bolts on my quarks. Just had the threads on one fail and I had to drill it out and replace with a new one from Petzl. Looking at the bolts though they are stamped with 010.9 M and appear to just be 10.9 grade bolts. In future if I want to replace any of them, is it safe to just replace them with any 10.9 bolt with the correct dimensions? I don't know if the bolts they use are any different to these, and I know if I ask them they'll probably say I can't for liability reasons.