WordNet
n. a wrench that has a gauge that indicates the amount of torque being applied
Wikipedia
A torque wrench is a tool used to precisely apply a specific torque to a fastener such as a nut or bolt. It is usually in the form of a socket wrench with special internal mechanisms. It was invented by Conrad Bahr in 1918 while working for the New York City Water Department. It was designed to prevent overtightening bolts on water main and steam pipe repairs underground.
A torque wrench is used where the tightness of screws and bolts is crucial. It allows the operator to measure the torque applied to the fastener so it can be matched to the specifications for a particular application. This permits proper tension and loading of all parts. A torque wrench measures torque as a proxy for bolt tension. The technique suffers from inaccuracy due to inconsistent or uncalibrated friction between the fastener and its mating hole. Measuring bolt tension (bolt stretch) is more accurate but often torque is the only practical means of measurement.
Torque screwdrivers and torque wrenches have similar purposes and mechanisms.
Usage examples of "torque wrench".
I pulled a wrench from the wall--a good heavy torque wrench, the kind with the steel handle and the bar that moves from side to side to indicate pound/feet of pressure instead of a meter.
What I had in hand was a set of the old-fashioned picks, a little hook and a tiny torque wrench, for occasions such as this.
Of course, if you didn't, I will take a flex-torque wrench to you with exquisite artistry.
It was a kid, maybe eighteen, dressed in coverails and carrying a torque wrench in his shaking hand.
Cappell the mathematician was beating on the control booth's door with a meter-long high-torque wrench he'd found somewhere.
I want her where I know the worst thing that can happen is that some overeager mechanic with a torque wrench will come along and tighten all the connectors to spec.
Because a bolt had been tightened up with a monkey wrench, not a torque wrench.