Applied Bolting Technology Products Direct tension indicating washers can streamline your bolt-up process. Using our DTIs for structural steel projects makes bolt installation and inspection easy. Applied Bolting Technology manufactures direct tension indicating (DTI) washers. These washers are used to get bolts installed to the correct TENSION, regardless of the bolt's torque resistance. Tens of millions of Squirter® DTI's have revolutionized the bolt-up process on power plants and other structural steel projects, making bolt installation and inspection easy and accurate.