Fort Sprocket is the home to the Bolt Foundry. Fort Sprocket is where most of the galaxy's bolts are held. So if you are low on bolts, come to the Fort and complete the level. After that you would be left with 400,000 bolts.
The scientest told Clank that The Kingpin used a laser to break into the bolt foundry. Go through the level and find the Kingpin.
Clank has been locked in the vault! Disable the A.I. to free Clank.