管用めねじのゲージ検査　~rp1/4のめねじを検査するゲージは？ | オーエスジー

gauge inspection of internal threads for pipes ~ What is the gauge to inspect the internal thread of RP1/4? ~

The gauge measuring the internal thread of Rp1/4 uses a tapered plug gauge of R.

gauge determines the "fit" of the screws.
Therefore, we use a gauge that has the same shape as the person we are flaming into.

* Parallel screws are judged by tapering gauge .