■  通端止端沒有檢查用和加工用的區別

    以前的JIS測量方式在量規的止端有檢查用和加工用的區別，ISO測量方式則沒有，凡事在規格要求之內無論是何種形式的螺紋（在允許磨損的     范圍之內)，顯示符合的話該產品則為合格。

        Go and NOT GO of the ISO gauge system is made with same dimentions for both inspection and working.

 ■  作為外螺紋的外用量規，滿足了以前的卡規和新的環規的功能。

        The ISO system adds a ring gauge for male thread (out side diameter) inspection.

■  判定螺紋環規的合格與否

     以前的JIS測量方式的螺紋環規，嵌合點檢量規螺紋被嵌合不能輕易松動則判定產品為合格。ISO測量方式的螺紋環規是根據通止兩端的點檢用      塞規通規來檢查的。通規的點檢用塞規通規（GRGF）可以輕松穿過，止規的點檢用塞規（GRNF)擰進不超過一圈就被卡住的話就判定為合格      的。止規的點檢用塞規（GRGF,NRNF)的判斷方法同通規。

       The inspection method for ring thread gauges is different from the conventional JIS system.Under the conventional system,acceptance          is given when the inspection gauge fits perfectly.In the ISO-based system,acceptance is given when the GO inspection plug(GRGF)                passes through the GO thread ring gauge (GR) and the stop inspection plug (GRNF) cannot be turned more than one and a half turns            from either side of the screw.Inspection plugs (NRGF) (NRNF) are used similarly for NOT GO ring gauges (NR).

■  磨損點檢用塞規

    磨損點檢用塞規的止端是考慮到量規壽命的增大和螺紋產品合格率的減少這一情況而適當規定，它沒有被JIS化而是新的ISO規定的產品被導入    JIS系統中。

       The conventional JIS gauge inspection specifies the use of a worn inspection plug to check GO thread ring gauges only.The ISO-based        system specifies its use for NOT GO thread ring gauges as well.

■   米制粗牙螺紋