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According to JIS B 0251:2008 gauge usage, the GO must pass through the overall length when screwed in by hand without excessive force.
(From OSG Technical Data Screw Gauge)
In the case of a limit plane gauge, the force at the time of gauge inspection is the own weight of the gauge (or the working load in the case of a pinch gauge) in the case of a limit plane gauge. If you have a small gauge, you should use it so that you can hold it with your fingertips.
Similarly, in the case of a limit plug gauge for screws, it is said that it is screwed with the strength when using a pencil, but in reality it is usually stronger than this. At the very least, you should not grip the handle with your palm and screw it unless it is particularly large.
In the case of a limit ring gauge for screws, it is better to fix the gauge and screw the product in your hand so that no extra torque is applied.
When inspecting a product with a tapered thread gauge for pipes, be careful when screwing in the final thread, as if it is screwed rapidly to the end of the gauge, it will be impactfully screwed in and will not be able to come out.