Tapered and Flat Beam torque wrenches are excellent choices for any application where:
The ability to visually confirm that the tool is correct before each use is important.
The application is such that the user can see the faceplate of the tool.
Greater accuracy than that provided by clicker torque wrenches is desired.
It is important to know torque variation during rundown, as with prevailing torque nuts.
The need for durability is extremely high.
There is a destructive nature to the application.
Capturing peak torque is important.
These needs are common in aircraft assembly and maintenance operations, fastener testing (in-process/final/receiving inspection) for prevailing torque nuts, and assembly compliance testing for products with rotating components. For these and similar operations, Flat Beam and Tapered Beam torque wrenches are often the best tools for the job.