UNC:统一粗牙螺纹5/16:螺纹公称尺寸,单位为英寸18:螺距为1/18,即每英寸18牙3A:公差等级,三级,外螺纹(B为内螺纹)R.H:右旋普螺纹与英制螺纹有何区别?公制螺纹用螺距来表示,美英制螺纹用每英寸内的螺纹牙数来表示,这是它们最大的区别,公制螺纹是60度等边牙型,英制螺纹是等腰55度牙型,美制螺纹60度。公制螺纹用公制单位,美英制螺纹用英制单位。管螺纹主要用来进行管道的连接,其内外螺纹的配合紧密,有直管与锥管...
公制螺纹参数简明表标准螺纹外螺纹大径内螺纹小径M121,25M121,251211,647M121,75M141,51211,376M1421210,106M161,5M1621412,376M181,5M1821411,835M182,5M201,51614,376M202M202,51613,835M221,5M2221816,3761815,8351815,2942018,3762017,8352017,2942220,3762219,835M222,52219,29425,376M271,52724,83523,752M2722728,37627,835M2732726,21131,376M301,53030,83529,211M3023033,83532,752M303,53031,67036,835M331,53335,752...