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  • No : 17664
  • Publication Date : 2025/09/05 11:11
  • Updated Date : 2026/01/15 14:52
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How to use the female thread inner diameter gauge

What are the criteria for determining whether a female thread internal diameter gauge passes or fails? 

The stop gauge stopped after a few millimeters, does this mean it passes?

Category : 

Answer

* The criteria for pass/fail judgment are different between the former JIS and the current JIS (ISO).

 

Pass/fail judgment based on the current JIS (ISO)

PP GO : pull out through without difficulty (penetration)

PP NOT GO: Passes if neither side has more than one turn of the screw

 

Former JIS pass/fail judgment

WM GO (Machining): Effortlessly pull out (penetration)

WM NOT GO: Not pull out

IM GO (Inspection): Effortlessly pull out through (penetration)

IM NOT GO: Not pull out

In this case, the judgment is divided between the former JIS and the current JIS (ISO).

It is necessary to judge the gauge and its standard according to the instruction accuracy.