Adjustable Thread Ring Gages & Setting Plugs

Adjustable Thread Ring Gages are used to inspect external product threads on screws, bolts and studs. Thread Setting Plug Gages are used to inspect, calibrate and set adjustable thread ring gages. Vermont Gage inventories a broad range of Adjustable Thread Ring Gages used to inspect both the Unified Inch and M Series Metric product threads.  We also carry Left Hand Unified and Metric thread gages. Custom Ring gages quote upon request.

  • Thread Types:
    • Unified Inch 
    • M Series Metric
  •  Thread Ring Gage Tolerance:
    • Class X 
      • Go PD: Minus
      • NoGo PD: Plus
  • Thread Setting Plug Tolerance
    • Class X (Pitch Diameter)
    • Class W (Other Features)
      • Go PD: Minus
      • NoGo PD: Plus
  • Class of Fit:
    • Unified Inch: 2A & 3A
    • M Series Metric: 6g
  •  Material:
    • Tool Steel, 60/62 Rc
  • Design:
    • ASME B47.1 
  • Certificate of Accuracy is included.
  • ISO 17025 Accredited and Non-Accredited Calibration Certificates may be purchased.
  • See pages 36 - 83 in the 2016 Gage Catalog for more information