深圳市海之恒仪器商行销售SHS螺纹量规.型号,M20X.规格,1.5-6H种类,GPNP.螺纹用的主要界限量规之使用方法 1、ISO等级的美标螺纹.管用平行螺纹用的量规都适用.2、GP，GR等用手拧进螺纹，并轻松的穿过。3、NP,NR等用手拧进螺纹，螺纹拧进最多不的超过2圈。4、GW,NW等用手拧进的同时，螺纹拧进最多不的超过一圈。Major gauges for threads of workpiece.1、Gauging system for ISO class Metric,Parallel pipe(G）.2、Screw this gauge in a worked thread by hand smoothly.GP,GR must go through over the whole length of thread.3、Screw this gauge into a woked thread smoothly by hand NP,NR shall not be screwed in it more than two revolutions from either sides.4、GR,NR shall not be screwed in more than one revolution from rither sides when screwing this check plug smoothly.深圳市海之恒仪器商行代理各种进口仪器仪表、电子工具、机械设备、五金工具、模具、刀具的技术开发、电子产品。联系电话：0755-83286328；83232968；83250802；传真：0755-83227989；公司网址：http://www.haiheng.com.cn 联系人：黄先生。