GO/NO GO Gages
Gages have a “Go” and “No Go” for street plate nuts and a “No Go” for street plate studs
Used to determine when these items need to be replaced.
Other coil hex nuts that are commercially available do no meet the requirements specified for lifting heavy street or trench plates.
The thread on these nuts are out of tolerance, and the material used is not suitable for the critical lifting application required for handling street or trench plates.