通止がなく、ｊという記号が入ったゲージ | オーエスジー

There is no stop, and the symbol J is entered gauge

The notation "J" for thread precision is the standard thread gauge .

As with the screw limit gauge , the accuracy of the screw cannot be guaranteed.

A standard thread gauge is a gauge that is correctly made to the basic angle and basic dimensions of the thread.

If you want to pass or fail the thread accuracy, you need a thread limit of gauge .