What is a Screw? | NBK | Couplings, Screws, Clampers
Screw Tightening Control Methods. Although fastening objects using the axial force generated from tightening is the main role of screws (bolts), in actual work, I think there are many people who control the torque by tightening with a torque wrench, because it is difficult to directly monitor the axial force, and so guarantee the axial force that way.