Wheel-Check is a loose nut indicator designed to identify a loose wheel nut with a quick visual inspection of the wheel.
The Wheel-Check is a small indicator that is placed on an individual nut with an arrow-like shape. When wheel nuts are torqued to proper specs, Wheel-Checks are placed on the nuts in a uniformed pattern. Over time, as a wheel nut loosens, the Wheel-Check will come out of sequence with the other Wheel-Checks indicating that the nut has come loose.
When a visual inspection of the wheel is performed, the Wheel-Check will quickly identify the wheel nuts that need tightening. Wheel-Checks are also heat sensitive. If there is a binding brake or seized bearing, the heat will transfer through the stud and nut.
If the temperature exceeds 248 degrees Fahrenheit, the Wheel-Check will start to blister and distort to alert a driver to assess and fix any problems with the wheel.