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This is a internal thread -shaped gauge that inspects the total effective diameter of external thread .
If it passes through, it will pass in that the effective diameter is not too large, and the screw accuracy is guaranteed by inspecting and passing it as a set with the stop screw ring gauge.
In addition to the effective diameter, the

A internal thread -shaped gauge that inspects the effective diameter of a external thread .
If it stops within the regulations, it will pass in that the effective diameter is not too small, and the thread accuracy is guaranteed by inspecting and passing the set with the thread thread ring gauge.
If there is a distinction between machin

M8×1.25 For 2nd grade,

The outer diameter of the GO gauge (GP) is +6~+18 micrometers compared to 8.

The outer diameter of the Tap varies slightly depending on the accuracy, but it is set at +60 micrometers or more, so it does not interfere.

(FAQID:202)

There is a difference in the second-class accuracy of the external thread with the reference effective diameter.

Class 1 threads start with a reference effective diameter.

If the workpiece enters during this time, this will be the result.

References:

API gauge ( gauge for OCTG) is not a standard product.

Please give a quote to sales, including whether or not it can be manufactured.

(FAQID:207)

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

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

PP GO (street): pull out through without difficulty (penetration)

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

●Conventional JIS pass/fail judgment

W

(FAQID:212)

Since the PS internal thread is a combination of PT external thread , a tapered plug gauge (PT) is used for pass/fail judgment.

However, only if the PS internal thread uses a PS external thread (now obsolete) and the PS plug gau

gauge There is a difference between new and calibrated tolerances.

The tolerance after calibration is wider than that of a new one due to the amount of wear.

The calibration certificate states the tolerances above and the tolerances of the wear limits.

* In the JIS handbook, there is a separate description as a wear limit.

(FAQID:2