梯形螺纹环规标准符合：GB812-87FED-SES-STD-H28/12公称尺寸螺距Ⅰ螺距Ⅱ螺距Ⅲ公称尺寸螺距Ⅰ螺距Ⅱ螺距ⅢTr81.5Tr423710Tr91.52Tr4437Tr101.53Tr4638Tr112.02Tr4838Tr122.03Tr5038Tr142.03Tr5238Tr162.04Tr5539Tr182.04Tr6039Tr202.04Tr65410Tr223.058Tr70410Tr243.058Tr75410Tr263.058Tr80410Tr283.058Tr854Tr303.0610Tr904Tr323.0610Tr954Tr343.0610Tr1004Tr363.0610Tr1104Tr383.0710Tr1206Tr403.0710Tr梯形螺纹塞规公称尺寸螺距Ⅰ螺距Ⅱ螺距Ⅲ公称尺寸螺距Ⅰ螺距Ⅱ螺距ⅢTr81.5Tr423710Tr91.52Tr4437Tr101.53Tr4638Tr112.02Tr4838Tr122.03Tr5038Tr142.03Tr5238Tr162.04Tr5539Tr182.04Tr6039Tr202.04Tr65410Tr223.058Tr70410Tr243.058Tr75410Tr263.058Tr80410Tr283.058Tr854Tr303.0610Tr904Tr323.0610Tr954Tr343.0610Tr1004Tr363.0610Tr1104Tr383.0710Tr1206Tr403.010Tr