For maximum strength of the joint, it is important to select the correct length of silo bolt. Longer bolts have a shank, and if the shank is too long, this will stop the nut tightening before the joint is fully closed, and the bolt will spin, damaging the glass coating; a bolt that is too short will not have enough thread for the nut to grip properly. In the joint, the shank of the bo... https://rsgfasteners.com/silo-bolts.php