■  通端止端没有检查用和加工用的区别

    以前的JIS测量方式在量规的止端有检查用和加工用的区别，ISO测量方式则没有，凡事在规格要求之内无论是何种形式的螺纹（在允许磨损的     范围之内)，显示符合的话该产品则为合格。

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

 ■  作为外螺纹的外用量规，满足了以前的卡规和新的环规的功能。

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

■  判定螺纹环规的合格与否

     以前的JIS测量方式的螺纹环规，嵌合点检量规螺纹被嵌合不能轻易松动则判定产品为合格。ISO测量方式的螺纹环规是根据通止两端的点检用      塞规通规来检查的。通规的点检用塞规通规（GRGF）可以轻松穿过，止规的点检用塞规（GRNF)拧进不超过一圈就被卡住的话就判定为合格      的。止规的点检用塞规（GRGF,NRNF)的判断方法同通规。

       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).

■  磨损点检用塞规

    磨损点检用塞规的止端是考虑到量规寿命的增大和螺纹产品合格率的减少这一情况而适当规定，它没有被JIS化而是新的ISO规定的产品被导入    JIS系统中。

       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.

■   米制粗牙螺纹