美标AGD可调螺纹环规是美国ANSI B1.2标准中的螺纹环规，美国的螺纹环规默认均为可调式，在标准过程中使用校对塞规来作为数值传递的计量工具，因此在校准过程中必须注意以下两点：

1.      对于可调式螺纹环规校准，不可以直接用扫描仪 或者测长机 测量螺纹环规的数值，测出来的数值是无效的， 不是按照标准的规定方法来测量的。

2.      对于可调式螺纹环规的校准，必须使用校对塞规set plug来校准

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