A manual wrench which incorporates a gage or measuring apparatus of some sort to measure and display the amount of torque being delivered to the nut or bolt. All wrenches produce torque. Only a torque wrench tells how much torque.
Torque Wrench Use and Care Tips:
- Tighten fasteners in two steps—first to half torque and then to final torque.
- Clean dirty or rusted threads before tightening, but don’t lubricate them unless instructed to by the equipment manufacturer.
- Always dial the wrench back to zero (never below zero) when you’re done with it.
- Never use your torque wrench as a breaker bar—that’ll damage the torque mechanism.
- Carry it with kid gloves—a single fall can knock the accuracy off by as much as 30 percent. If you do drop it, get it recalibrated (calibration firms listed below) before using it again.