Helical Coil (STI) Plug Gages are used to gage threaded holes prior to insertion of screw thread inserts
- Standard Taperlock Style made to ASME B18.29..1
- AGD Taperlock Style Class "X"
- Unified Thread Series (UNC-UNF)
- Certificate of Accuracy are supplied with each Gage
- Calibration Certificate Available

