1、GB/T9253.1-1999H一原始三角形高度hn(h.)一内（外）螺纹牙型高度hn(h,)一内（外）螺纹牙顶高h,n(h)一内（外）螺纹牙顶高偏差h(h,)一内（外）螺纹牙型高度偏差Sm(S)一内（外）螺纹弧牙底削平高度fm(f。)一内（外）螺纹平牙底削平高度fm(f)一内（外）螺纹牙顶削平高度Fn(F,)一内（外）螺纹牙顶宽度F(F)一内（外）螺纹牙底宽度rm(r)一内（外）螺纹牙底圆弧半径r一圆角半径C一基面中径D一外期纹大端大径D一外螺纹根部圆柱直径D一外螺纹小端大径Lx一外螺纹锥部长度I一内螺纹有效螺纹长度L一内螺纹锥部长度Q。一内螺纹扩锥孔大端直径D。一内螺纹大端小径A一内外螺纹
2、倒角宽度S一校对塞规与校对环规的配对紧密距值S,一校对环规对工作塞规的互换紧密距值S:一校对塞规对工作环规的互换紧密距值4牙型螺纹牙型应符合图1和表1的规定。英制尺寸见附录A表A1。表1石油估杆接头螺纹牙型尺寸牙底削平原始三角牙顶削平牙底圆弧牙型高度高度螺距形高度牙顶宽度牙底宽度圆角半径高度半径牙型代号锥度h.=h,5m=5nFa=FoFm=FnP.mmfa=fafm-fnrn=rommV-0.038R6.3501；65.4873.0951.4260.9651.6510.9650.381V-0.038R6.3501；45.4713.0831.4230.9651.651一0.9650.381V-0.0405.0801；44.3762.9930.8750.5081.0160.5080.381V-0.0506.3501:45.4713.7431.0940.6351.2700.6350.381V-0.0506.3501965.4873.7551.0970.6351.2700.6350.381V-0.0554.233183.6601.4201.2091.0311.3971.1940.381V-0.0656.350165.4872.8311.4261.2291.6511.4220.381
