How does a Direct Tension Indicator (DTI) work?
Direct Tension Indicators work by generating an axial tensile force in a bolt or stud as the DTI protrusions are compressed; except for sufficient lubrication to allow the nut of the assembly to be rotated under load, “torque” has no affect on the process. (Note: It is bolt tension, not torque that determines the clamped up strength in a joint).
