该产品用于检查管，管用零部件，液体机器等的连接，且要求高密封性的黏合为主要目的的螺纹所用。

       The ISO 7/1 standard makes no specification although is a JIS specification (document attached). This type of thread is for joining in plumbing and equipment handling fluids, etc.Where tight connections  are required. Taper thread gauges for pipe thread (PT) are used for nspection.

■  管和量规的关系图      

     Related positions of pipe and gauges

■螺纹与量规的种类与标记

量规的使用方法

  （1）成品螺纹的检查

※管用平行螺帽是与管用螺丝配套使用的，与管用平行螺帽G及PF的尺寸容许差有所不同

   （2）锥形螺纹环规的检查