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  • No : 17917
  • Publication Date : 2025/09/05 11:11
  • Updated Date : 2026/02/02 08:57
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A / B is written on the GO thread gauge of G / PF. What does it mean?

A / B is written on the GO thread gauge of G / PF. What does it mean?

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Answer

The notation A/B in the accuracy column of the GO screw gauge of the parallel screws G and PF for pipes means that they can be shared in the pass/fail judgment of the thread accuracy of Class A and Class B.
 
* NOT-GO requires a distinction between Class A and Class B. Please use the accuracy of the drawing instructions.
 
* Please note that it does not mean that there is AB class in addition to A and B classes.
 

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