深圳市海之恒儀器商行銷售SHS螺紋量規.型號,M20X.規格,1.5-6H種類,GPNP.螺紋用的主要界限量規之使用方法 1、ISO等級的美標螺紋.管用平行螺紋用的量規都適用.2、GP，GR等用手擰進螺紋，并輕松的穿過。3、NP,NR等用手擰進螺紋，螺紋擰進最多不的超過2圈。4、GW,NW等用手擰進的同時，螺紋擰進最多不的超過一圈。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.深圳市海之恒儀器商行代理各種進口儀器儀表、電子工具、機械設備、五金工具、模具、刀具的技術開發、電子產品。聯系電話：0755-83286328；83232968；83250802；傳真：0755-83227989；公司網址：http:// 聯系人：黃先生。