Kato CoilThread STI (Screw Thread Insert) Thread Plug Gages are designed to check the accuracy of the internal thread of an STI tapped hole. Gaging the tapped hole prior to installation of the insert is critical to ensure the accuracy of the finished thread. If the tapped hole gauges correctly, the finished thread will also be accurate once the insert is properly installed and seated.
Kato Reference STI Thread Plug Gage, Unit of Measure: Inch, 3/4-10 Thread Size, UNC Thread Type, 2B Thread Class, Pitch Diameter Go: 0.8149 Inch, Pitch Diameter NoGo: 0.8216 Inch, 5.1 Inch Length