M24 metric bolts 16.5 inches long K-T 10.9 rating which is equal or slightly harder then grade 8 so a very good bolt. I have about 2500 lbs of bolts so some where in the neighborhood of 1000 bolts these bolts to buy new ( they are new never been used) could be around $10 a bolt willing to look at offers please contact pete at 801-721-0674 thanks