{"id":5777,"date":"2025-12-25T01:06:12","date_gmt":"2025-12-25T01:06:12","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5777"},"modified":"2025-12-25T01:06:12","modified_gmt":"2025-12-25T01:06:12","slug":"thread-rolling-tapping-diameters-chart-metric-imperial","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/zh\/%e5%8d%9a%e5%ae%a2\/thread-rolling-tapping-diameters-chart-metric-imperial\/","title":{"rendered":"Thread Rolling &#038; Tapping Diameters Chart: Metric &#038; Imperial"},"content":{"rendered":"<div>\n<h2 dir=\"auto\">Introduction to Thread Rolling Diameters<\/h2>\n<p dir=\"auto\">Thread rolling diameter, also known as blank diameter or rolling blank diameter, refers to the diameter of the external thread (screw) blank before the rolling or forming process. This is the smooth rod diameter prior to thread formation. It is a critical process parameter in screw manufacturing, distinct from major, pitch, or minor diameters. This value is primarily relevant for manufacturers to ensure proper thread formation and is based on standards such as GB\/T18685-2017 for metric threads and GB\/T34632-2017 for imperial threads.<\/p>\n<p dir=\"auto\">Understanding these diameters helps in selecting appropriate blanks for rolling processes, ensuring threads meet tolerance grades like 4h, 6h, 6g (common), 6f, and 6e for metric, or 3A and 2A (common) for imperial. Proper blank sizing prevents defects such as underfilled threads or material cracking.<\/p>\n<ul dir=\"auto\">\n<li>Metric threads use millimeters (mm) for measurements.<\/li>\n<li>Imperial threads specify threads per inch (TPI) and use inches for nominal size, with diameters in mm for consistency.<\/li>\n<li>Tolerance grades affect the max and min blank diameters to achieve desired thread fit.<\/li>\n<\/ul>\n<\/div>\n<div>\n<h2 dir=\"auto\">Metric External Thread Rolling Diameters Table<\/h2>\n<p dir=\"auto\">Unit: mm. Standard: GB\/T18685-2017. Tolerance grades: 4h, 6h, 6g (common), 6f, 6e. The table lists max and min values for various nominal sizes and pitches.<\/p>\n<div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th rowspan=\"2\" data-col-size=\"xs\">Tolerance Grade<\/th>\n<th rowspan=\"2\" data-col-size=\"xs\">\u9650\u5236<\/th>\n<th data-col-size=\"sm\">M1 0.25<\/th>\n<th data-col-size=\"sm\">M1 0.2<\/th>\n<th data-col-size=\"sm\">M1.1 0.25<\/th>\n<th data-col-size=\"sm\">M1.1 0.2<\/th>\n<th data-col-size=\"sm\">M1.2 0.25<\/th>\n<th data-col-size=\"sm\">M1.2 0.2<\/th>\n<th data-col-size=\"sm\">M1.4 0.3<\/th>\n<th data-col-size=\"sm\">M1.4 0.2<\/th>\n<th data-col-size=\"sm\">M1.6 0.35<\/th>\n<th data-col-size=\"sm\">M1.6 0.2<\/th>\n<th data-col-size=\"sm\">M1.8 0.35<\/th>\n<th data-col-size=\"sm\">M1.8 0.2<\/th>\n<th data-col-size=\"xs\">M2 0.4<\/th>\n<th data-col-size=\"sm\">M2 0.25<\/th>\n<th data-col-size=\"sm\">M2.2 0.45<\/th>\n<th data-col-size=\"sm\">M2.2 0.25<\/th>\n<th data-col-size=\"sm\">M2.5 0.45<\/th>\n<th data-col-size=\"sm\">M2.5 0.35<\/th>\n<th data-col-size=\"sm\">M3 0.5<\/th>\n<th data-col-size=\"sm\">M3 0.35<\/th>\n<th data-col-size=\"sm\">M3.5 0.6<\/th>\n<th data-col-size=\"sm\">M3.5 0.35<\/th>\n<th data-col-size=\"sm\">M4 0.7<\/th>\n<th data-col-size=\"sm\">M4 0.5<\/th>\n<th data-col-size=\"sm\">M4.5 0.75<\/th>\n<th data-col-size=\"sm\">M4.5 0.5<\/th>\n<th data-col-size=\"sm\">M5 0.8<\/th>\n<th data-col-size=\"sm\">M5 0.5<\/th>\n<th data-col-size=\"sm\">M6 1<\/th>\n<th data-col-size=\"sm\">M6 0.75<\/th>\n<th data-col-size=\"sm\">M7 1<\/th>\n<th data-col-size=\"sm\">M7 0.75<\/th>\n<th data-col-size=\"sm\">M8 1.25<\/th>\n<th data-col-size=\"sm\">M8 1<\/th>\n<th data-col-size=\"sm\">M8 0.75<\/th>\n<th data-col-size=\"sm\">M10 1.5<\/th>\n<th data-col-size=\"sm\">M10 1.25<\/th>\n<th data-col-size=\"sm\">M10 1<\/th>\n<th data-col-size=\"sm\">M10 0.75<\/th>\n<th data-col-size=\"md\">M12 1.75<\/th>\n<th data-col-size=\"md\">M12 1.5<\/th>\n<th data-col-size=\"md\">M12 1.25<\/th>\n<th data-col-size=\"md\">M12 1<\/th>\n<th data-col-size=\"md\">M14 2<\/th>\n<th data-col-size=\"md\">M14 1.5<\/th>\n<th data-col-size=\"md\">M14 1<\/th>\n<th data-col-size=\"md\">M16 2<\/th>\n<th data-col-size=\"md\">M16 1.5<\/th>\n<th data-col-size=\"md\">M16 1<\/th>\n<th data-col-size=\"md\">M18 2.5<\/th>\n<th data-col-size=\"md\">M18 2<\/th>\n<th data-col-size=\"md\">M18 1.5<\/th>\n<th data-col-size=\"md\">M18 1<\/th>\n<th data-col-size=\"md\">M20 2.5<\/th>\n<th data-col-size=\"md\">M20 2<\/th>\n<th data-col-size=\"md\">M20 1.5<\/th>\n<th data-col-size=\"md\">M20 1<\/th>\n<th data-col-size=\"md\">M22 2.5<\/th>\n<th data-col-size=\"md\">M22 2<\/th>\n<th data-col-size=\"md\">M22 1.5<\/th>\n<th data-col-size=\"md\">M22 1<\/th>\n<th data-col-size=\"md\">M24 3<\/th>\n<th data-col-size=\"md\">M24 2<\/th>\n<th data-col-size=\"md\">M24 1.5<\/th>\n<th data-col-size=\"md\">M24 1<\/th>\n<th data-col-size=\"md\">M27 3<\/th>\n<th data-col-size=\"md\">M27 2<\/th>\n<th data-col-size=\"md\">M27 1.5<\/th>\n<th data-col-size=\"md\">M27 1<\/th>\n<th data-col-size=\"md\">M30 3.5<\/th>\n<th data-col-size=\"md\">M30 2<\/th>\n<th data-col-size=\"md\">M30 1.5<\/th>\n<th data-col-size=\"md\">M30 1<\/th>\n<th data-col-size=\"md\">M33 3.5<\/th>\n<th data-col-size=\"md\">M33 2<\/th>\n<th data-col-size=\"md\">M33 1.5<\/th>\n<th data-col-size=\"md\">M36 4<\/th>\n<th data-col-size=\"md\">M36 3<\/th>\n<th data-col-size=\"md\">M36 2<\/th>\n<th data-col-size=\"md\">M36 1.5<\/th>\n<th data-col-size=\"md\">M39 4<\/th>\n<th data-col-size=\"md\">M39 3<\/th>\n<th data-col-size=\"md\">M39 2<\/th>\n<th data-col-size=\"md\">M39 1.5<\/th>\n<th data-col-size=\"md\">M42 4<\/th>\n<th data-col-size=\"md\">M42 3<\/th>\n<th data-col-size=\"md\">M42 2<\/th>\n<th data-col-size=\"md\">M42 1.5<\/th>\n<th data-col-size=\"md\">M45 4<\/th>\n<th data-col-size=\"md\">M45 3<\/th>\n<th data-col-size=\"md\">M45 2<\/th>\n<th data-col-size=\"md\">M45 1.5<\/th>\n<th data-col-size=\"md\">M48 4<\/th>\n<th data-col-size=\"md\">M48 3<\/th>\n<th data-col-size=\"md\">M48 2<\/th>\n<th data-col-size=\"md\">M48 1.5<\/th>\n<th data-col-size=\"md\">M52 4<\/th>\n<th data-col-size=\"md\">M52 3<\/th>\n<th data-col-size=\"md\">M52 2<\/th>\n<th data-col-size=\"md\">M52 1.5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td rowspan=\"2\" data-col-size=\"xs\">4h<\/td>\n<td data-col-size=\"xs\">\u6700\u5927\u9650\u5ea6<\/td>\n<td data-col-size=\"sm\">0.833<\/td>\n<td data-col-size=\"sm\">0.864<\/td>\n<td data-col-size=\"sm\">0.933<\/td>\n<td data-col-size=\"sm\">0.963<\/td>\n<td data-col-size=\"sm\">1.032<\/td>\n<td data-col-size=\"sm\">1.063<\/td>\n<td data-col-size=\"sm\">1.199<\/td>\n<td data-col-size=\"sm\">1.262<\/td>\n<td data-col-size=\"sm\">1.366<\/td>\n<td data-col-size=\"sm\">1.462<\/td>\n<td data-col-size=\"sm\">1.565<\/td>\n<td data-col-size=\"sm\">1.661<\/td>\n<td data-col-size=\"xs\">1.733<\/td>\n<td data-col-size=\"sm\">1.829<\/td>\n<td data-col-size=\"sm\">1.901<\/td>\n<td data-col-size=\"sm\">2.029<\/td>\n<td data-col-size=\"sm\">2.199<\/td>\n<td data-col-size=\"sm\">2.263<\/td>\n<td data-col-size=\"sm\">2.665<\/td>\n<td data-col-size=\"sm\">2.762<\/td>\n<td data-col-size=\"sm\">3.098<\/td>\n<td data-col-size=\"sm\">3.26<\/td>\n<td data-col-size=\"sm\">3.539<\/td>\n<td data-col-size=\"sm\">3.666<\/td>\n<td data-col-size=\"sm\">4.006<\/td>\n<td data-col-size=\"sm\">4.165<\/td>\n<td data-col-size=\"sm\">4.472<\/td>\n<td data-col-size=\"sm\">4.664<\/td>\n<td data-col-size=\"sm\">5.344<\/td>\n<td data-col-size=\"sm\">5.501<\/td>\n<td data-col-size=\"sm\">6.341<\/td>\n<td data-col-size=\"sm\">6.499<\/td>\n<td data-col-size=\"sm\">7.184<\/td>\n<td data-col-size=\"sm\">7.338<\/td>\n<td data-col-size=\"sm\">7.498<\/td>\n<td data-col-size=\"sm\">9.016<\/td>\n<td data-col-size=\"sm\">9.179<\/td>\n<td data-col-size=\"sm\">9.335<\/td>\n<td data-col-size=\"sm\">9.497<\/td>\n<td data-col-size=\"md\">10.846<\/td>\n<td data-col-size=\"md\">11.011<\/td>\n<td data-col-size=\"md\">11.17<\/td>\n<td data-col-size=\"md\">11.333<\/td>\n<td data-col-size=\"md\">12.689<\/td>\n<td data-col-size=\"md\">13.008<\/td>\n<td data-col-size=\"md\">13.332<\/td>\n<td data-col-size=\"md\">14.685<\/td>\n<td data-col-size=\"md\">15.006<\/td>\n<td data-col-size=\"md\">15.331<\/td>\n<td data-col-size=\"md\">16.364<\/td>\n<td data-col-size=\"md\">16.681<\/td>\n<td data-col-size=\"md\">17.004<\/td>\n<td data-col-size=\"md\">17.33<\/td>\n<td data-col-size=\"md\">18.359<\/td>\n<td data-col-size=\"md\">18.679<\/td>\n<td data-col-size=\"md\">19.003<\/td>\n<td data-col-size=\"md\">19.33<\/td>\n<td data-col-size=\"md\">20.356<\/td>\n<td data-col-size=\"md\">20.677<\/td>\n<td data-col-size=\"md\">20.997<\/td>\n<td data-col-size=\"md\">21.329<\/td>\n<td data-col-size=\"md\">22.03<\/td>\n<td data-col-size=\"md\">22.675<\/td>\n<td data-col-size=\"md\">22.996<\/td>\n<td data-col-size=\"md\">23.329<\/td>\n<td data-col-size=\"md\">25.025<\/td>\n<td data-col-size=\"md\">25.673<\/td>\n<td data-col-size=\"md\">25.995<\/td>\n<td data-col-size=\"md\">26.328<\/td>\n<td data-col-size=\"md\">27.711<\/td>\n<td data-col-size=\"md\">28.671<\/td>\n<td data-col-size=\"md\">28.994<\/td>\n<td data-col-size=\"md\">29.328<\/td>\n<td data-col-size=\"md\">30.707<\/td>\n<td data-col-size=\"md\">31.67<\/td>\n<td data-col-size=\"md\">31.994<\/td>\n<td data-col-size=\"md\">33.386<\/td>\n<td data-col-size=\"md\">34.016<\/td>\n<td data-col-size=\"md\">34.669<\/td>\n<td data-col-size=\"md\">34.993<\/td>\n<td data-col-size=\"md\">36.382<\/td>\n<td data-col-size=\"md\">37.014<\/td>\n<td data-col-size=\"md\">37.668<\/td>\n<td data-col-size=\"md\">37.993<\/td>\n<td data-col-size=\"md\">39.379<\/td>\n<td data-col-size=\"md\">40.012<\/td>\n<td data-col-size=\"md\">40.667<\/td>\n<td data-col-size=\"md\">40.992<\/td>\n<td data-col-size=\"md\">42.376<\/td>\n<td data-col-size=\"md\">43.01<\/td>\n<td data-col-size=\"md\">43.666<\/td>\n<td data-col-size=\"md\">43.992<\/td>\n<td data-col-size=\"md\">45.373<\/td>\n<td data-col-size=\"md\">46.001<\/td>\n<td data-col-size=\"md\">46.666<\/td>\n<td data-col-size=\"md\">46.991<\/td>\n<td data-col-size=\"md\">49.370<\/td>\n<td data-col-size=\"md\">49.999<\/td>\n<td data-col-size=\"md\">50.665<\/td>\n<td data-col-size=\"md\">50.991<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">\u654f<\/td>\n<td data-col-size=\"xs\">0.817<\/td>\n<td data-col-size=\"sm\">0.849<\/td>\n<td data-col-size=\"sm\">0.916<\/td>\n<td data-col-size=\"sm\">0.948<\/td>\n<td data-col-size=\"sm\">1.015<\/td>\n<td data-col-size=\"sm\">1.048<\/td>\n<td data-col-size=\"sm\">1.182<\/td>\n<td data-col-size=\"sm\">1.247<\/td>\n<td data-col-size=\"sm\">1.348<\/td>\n<td data-col-size=\"sm\">1.445<\/td>\n<td data-col-size=\"sm\">1.547<\/td>\n<td data-col-size=\"sm\">1.645<\/td>\n<td data-col-size=\"sm\">1.714<\/td>\n<td data-col-size=\"xs\">1.81<\/td>\n<td data-col-size=\"sm\">1.881<\/td>\n<td data-col-size=\"sm\">2.01<\/td>\n<td data-col-size=\"sm\">2.179<\/td>\n<td data-col-size=\"sm\">2.245<\/td>\n<td data-col-size=\"sm\">2.644<\/td>\n<td data-col-size=\"sm\">2.742<\/td>\n<td data-col-size=\"sm\">3.078<\/td>\n<td data-col-size=\"sm\">3.241<\/td>\n<td data-col-size=\"sm\">3.513<\/td>\n<td data-col-size=\"sm\">3.642<\/td>\n<td data-col-size=\"sm\">3.981<\/td>\n<td data-col-size=\"sm\">4.141<\/td>\n<td data-col-size=\"sm\">4.445<\/td>\n<td data-col-size=\"sm\">4.64<\/td>\n<td data-col-size=\"sm\">5.312<\/td>\n<td data-col-size=\"sm\">5.471<\/td>\n<td data-col-size=\"sm\">6.309<\/td>\n<td data-col-size=\"sm\">6.469<\/td>\n<td data-col-size=\"sm\">7.152<\/td>\n<td data-col-size=\"sm\">7.307<\/td>\n<td data-col-size=\"sm\">7.468<\/td>\n<td data-col-size=\"sm\">8.986<\/td>\n<td data-col-size=\"sm\">9.147<\/td>\n<td data-col-size=\"sm\">9.304<\/td>\n<td data-col-size=\"sm\">9.466<\/td>\n<td data-col-size=\"sm\">10.818<\/td>\n<td data-col-size=\"md\">10.976<\/td>\n<td data-col-size=\"md\">11.134<\/td>\n<td data-col-size=\"md\">11.298<\/td>\n<td data-col-size=\"md\">12.659<\/td>\n<td data-col-size=\"md\">12.973<\/td>\n<td data-col-size=\"md\">13.297<\/td>\n<td data-col-size=\"md\">14.655<\/td>\n<td data-col-size=\"md\">14.97<\/td>\n<td data-col-size=\"md\">15.296<\/td>\n<td data-col-size=\"md\">16.339<\/td>\n<td data-col-size=\"md\">16.651<\/td>\n<td data-col-size=\"md\">16.969<\/td>\n<td data-col-size=\"md\">17.295<\/td>\n<td data-col-size=\"md\">18.335<\/td>\n<td data-col-size=\"md\">18.649<\/td>\n<td data-col-size=\"md\">18.967<\/td>\n<td data-col-size=\"md\">19.294<\/td>\n<td data-col-size=\"md\">20.332<\/td>\n<td data-col-size=\"md\">20.647<\/td>\n<td data-col-size=\"md\">20.966<\/td>\n<td data-col-size=\"md\">21.294<\/td>\n<td data-col-size=\"md\">22.003<\/td>\n<td data-col-size=\"md\">22.639<\/td>\n<td data-col-size=\"md\">22.96<\/td>\n<td data-col-size=\"md\">23.288<\/td>\n<td data-col-size=\"md\">24.998<\/td>\n<td data-col-size=\"md\">25.637<\/td>\n<td data-col-size=\"md\">25.959<\/td>\n<td data-col-size=\"md\">26.288<\/td>\n<td data-col-size=\"md\">27.681<\/td>\n<td data-col-size=\"md\">28.635<\/td>\n<td data-col-size=\"md\">28.958<\/td>\n<td data-col-size=\"md\">29.287<\/td>\n<td data-col-size=\"md\">30.677<\/td>\n<td data-col-size=\"md\">31.634<\/td>\n<td data-col-size=\"md\">31.957<\/td>\n<td data-col-size=\"md\">33.358<\/td>\n<td data-col-size=\"md\">33.989<\/td>\n<td data-col-size=\"md\">34.633<\/td>\n<td data-col-size=\"md\">34.957<\/td>\n<td data-col-size=\"md\">36.354<\/td>\n<td data-col-size=\"md\">36.987<\/td>\n<td data-col-size=\"md\">37.632<\/td>\n<td data-col-size=\"md\">37.956<\/td>\n<td data-col-size=\"md\">39.351<\/td>\n<td data-col-size=\"md\">39.985<\/td>\n<td data-col-size=\"md\">40.631<\/td>\n<td data-col-size=\"md\">40.956<\/td>\n<td data-col-size=\"md\">42.348<\/td>\n<td data-col-size=\"md\">42.983<\/td>\n<td data-col-size=\"md\">43.63<\/td>\n<td data-col-size=\"md\">43.955<\/td>\n<td data-col-size=\"md\">45.335<\/td>\n<td data-col-size=\"md\">45.975<\/td>\n<td data-col-size=\"md\">46.624<\/td>\n<td data-col-size=\"md\">46.95<\/td>\n<td data-col-size=\"md\">49.332<\/td>\n<td data-col-size=\"md\">49.973<\/td>\n<td data-col-size=\"md\">50.623<\/td>\n<td data-col-size=\"md\">50.95<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" data-col-size=\"xs\">6h<\/td>\n<td data-col-size=\"xs\">\u6700\u5927\u9650\u5ea6<\/td>\n<td data-col-size=\"sm\">0.83<\/td>\n<td data-col-size=\"sm\">0.864<\/td>\n<td data-col-size=\"sm\">0.93<\/td>\n<td data-col-size=\"sm\">0.963<\/td>\n<td data-col-size=\"sm\">1.029<\/td>\n<td data-col-size=\"sm\">1.063<\/td>\n<td data-col-size=\"sm\">1.196<\/td>\n<td data-col-size=\"sm\">1.262<\/td>\n<td data-col-size=\"sm\">1.363<\/td>\n<td data-col-size=\"sm\">1.462<\/td>\n<td data-col-size=\"sm\">1.562<\/td>\n<td data-col-size=\"sm\">1.661<\/td>\n<td data-col-size=\"xs\">1.73<\/td>\n<td data-col-size=\"sm\">1.826<\/td>\n<td data-col-size=\"sm\">1.898<\/td>\n<td data-col-size=\"sm\">2.026<\/td>\n<td data-col-size=\"sm\">2.196<\/td>\n<td data-col-size=\"sm\">2.26<\/td>\n<td data-col-size=\"sm\">2.662<\/td>\n<td data-col-size=\"sm\">2.759<\/td>\n<td data-col-size=\"sm\">3.092<\/td>\n<td data-col-size=\"sm\">3.257<\/td>\n<td data-col-size=\"sm\">3.528<\/td>\n<td data-col-size=\"sm\">3.658<\/td>\n<td data-col-size=\"sm\">3.996<\/td>\n<td data-col-size=\"sm\">4.157<\/td>\n<td data-col-size=\"sm\">4.461<\/td>\n<td data-col-size=\"sm\">4.657<\/td>\n<td data-col-size=\"sm\">5.328<\/td>\n<td data-col-size=\"sm\">5.49<\/td>\n<td data-col-size=\"sm\">6.325<\/td>\n<td data-col-size=\"sm\">6.488<\/td>\n<td data-col-size=\"sm\">7.166<\/td>\n<td data-col-size=\"sm\">7.323<\/td>\n<td data-col-size=\"sm\">7.487<\/td>\n<td data-col-size=\"sm\">8.994<\/td>\n<td data-col-size=\"sm\">9.161<\/td>\n<td data-col-size=\"sm\">9.32<\/td>\n<td data-col-size=\"sm\">9.485<\/td>\n<td data-col-size=\"md\">10.822<\/td>\n<td data-col-size=\"md\">10.99<\/td>\n<td data-col-size=\"md\">11.15<\/td>\n<td data-col-size=\"md\">11.318<\/td>\n<td data-col-size=\"md\">12.663<\/td>\n<td data-col-size=\"md\">12.986<\/td>\n<td data-col-size=\"md\">13.317<\/td>\n<td data-col-size=\"md\">14.658<\/td>\n<td data-col-size=\"md\">14.984<\/td>\n<td data-col-size=\"md\">15.316<\/td>\n<td data-col-size=\"md\">16.324<\/td>\n<td data-col-size=\"md\">16.655<\/td>\n<td data-col-size=\"md\">16.982<\/td>\n<td data-col-size=\"md\">17.315<\/td>\n<td data-col-size=\"md\">18.32<\/td>\n<td data-col-size=\"md\">18.652<\/td>\n<td data-col-size=\"md\">18.981<\/td>\n<td data-col-size=\"md\">19.315<\/td>\n<td data-col-size=\"md\">20.316<\/td>\n<td data-col-size=\"md\">20.65<\/td>\n<td data-col-size=\"md\">20.974<\/td>\n<td data-col-size=\"md\">21.314<\/td>\n<td data-col-size=\"md\">21.995<\/td>\n<td data-col-size=\"md\">22.649<\/td>\n<td data-col-size=\"md\">22.973<\/td>\n<td data-col-size=\"md\">23.314<\/td>\n<td data-col-size=\"md\">24.99<\/td>\n<td data-col-size=\"md\">25.647<\/td>\n<td data-col-size=\"md\">25.971<\/td>\n<td data-col-size=\"md\">26.313<\/td>\n<td data-col-size=\"md\">27.656<\/td>\n<td data-col-size=\"md\">28.645<\/td>\n<td data-col-size=\"md\">28.971<\/td>\n<td data-col-size=\"md\">29.313<\/td>\n<td data-col-size=\"md\">30.651<\/td>\n<td data-col-size=\"md\">31.644<\/td>\n<td data-col-size=\"md\">31.97<\/td>\n<td data-col-size=\"md\">33.326<\/td>\n<td data-col-size=\"md\">33.98<\/td>\n<td data-col-size=\"md\">34.642<\/td>\n<td data-col-size=\"md\">34.969<\/td>\n<td data-col-size=\"md\">36.322<\/td>\n<td data-col-size=\"md\">36.978<\/td>\n<td data-col-size=\"md\">37.642<\/td>\n<td data-col-size=\"md\">37.969<\/td>\n<td data-col-size=\"md\">39.319<\/td>\n<td data-col-size=\"md\">39.976<\/td>\n<td data-col-size=\"md\">40.641<\/td>\n<td data-col-size=\"md\">40.968<\/td>\n<td data-col-size=\"md\">42.316<\/td>\n<td data-col-size=\"md\">42.975<\/td>\n<td data-col-size=\"md\">43.64<\/td>\n<td data-col-size=\"md\">43.968<\/td>\n<td data-col-size=\"md\">45.313<\/td>\n<td data-col-size=\"md\">45.967<\/td>\n<td data-col-size=\"md\">46.64<\/td>\n<td data-col-size=\"md\">46.968<\/td>\n<td data-col-size=\"md\">49.31<\/td>\n<td data-col-size=\"md\">49.965<\/td>\n<td data-col-size=\"md\">50.639<\/td>\n<td data-col-size=\"md\">50.967<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">\u654f<\/td>\n<td data-col-size=\"xs\">0.798<\/td>\n<td data-col-size=\"sm\">0.831<\/td>\n<td data-col-size=\"sm\">0.897<\/td>\n<td data-col-size=\"sm\">0.931<\/td>\n<td data-col-size=\"sm\">0.996<\/td>\n<td data-col-size=\"sm\">1.03<\/td>\n<td data-col-size=\"sm\">1.162<\/td>\n<td data-col-size=\"sm\">1.229<\/td>\n<td data-col-size=\"sm\">1.325<\/td>\n<td data-col-size=\"sm\">1.427<\/td>\n<td data-col-size=\"sm\">1.524<\/td>\n<td data-col-size=\"sm\">1.627<\/td>\n<td data-col-size=\"sm\">1.689<\/td>\n<td data-col-size=\"xs\">1.79<\/td>\n<td data-col-size=\"sm\">1.855<\/td>\n<td data-col-size=\"sm\">1.99<\/td>\n<td data-col-size=\"sm\">2.154<\/td>\n<td data-col-size=\"sm\">2.222<\/td>\n<td data-col-size=\"sm\">2.617<\/td>\n<td data-col-size=\"sm\">2.717<\/td>\n<td data-col-size=\"sm\">3.046<\/td>\n<td data-col-size=\"sm\">3.216<\/td>\n<td data-col-size=\"sm\">3.479<\/td>\n<td data-col-size=\"sm\">3.615<\/td>\n<td data-col-size=\"sm\">3.948<\/td>\n<td data-col-size=\"sm\">4.114<\/td>\n<td data-col-size=\"sm\">4.41<\/td>\n<td data-col-size=\"sm\">4.613<\/td>\n<td data-col-size=\"sm\">5.271<\/td>\n<td data-col-size=\"sm\">5.434<\/td>\n<td data-col-size=\"sm\">6.268<\/td>\n<td data-col-size=\"sm\">6.432<\/td>\n<td data-col-size=\"sm\">7.109<\/td>\n<td data-col-size=\"sm\">7.266<\/td>\n<td data-col-size=\"sm\">7.431<\/td>\n<td data-col-size=\"sm\">8.939<\/td>\n<td data-col-size=\"sm\">9.104<\/td>\n<td data-col-size=\"sm\">9.263<\/td>\n<td data-col-size=\"sm\">9.429<\/td>\n<td data-col-size=\"sm\">10.764<\/td>\n<td data-col-size=\"md\">10.926<\/td>\n<td data-col-size=\"md\">11.087<\/td>\n<td data-col-size=\"md\">11.255<\/td>\n<td data-col-size=\"md\">12.599<\/td>\n<td data-col-size=\"md\">12.923<\/td>\n<td data-col-size=\"md\">13.254<\/td>\n<td data-col-size=\"md\">14.595<\/td>\n<td data-col-size=\"md\">14.92<\/td>\n<td data-col-size=\"md\">15.253<\/td>\n<td data-col-size=\"md\">16.276<\/td>\n<td data-col-size=\"md\">16.591<\/td>\n<td data-col-size=\"md\">16.919<\/td>\n<td data-col-size=\"md\">17.252<\/td>\n<td data-col-size=\"md\">18.271<\/td>\n<td data-col-size=\"md\">18.589<\/td>\n<td data-col-size=\"md\">18.917<\/td>\n<td data-col-size=\"md\">19.251<\/td>\n<td data-col-size=\"md\">20.268<\/td>\n<td data-col-size=\"md\">20.587<\/td>\n<td data-col-size=\"md\">20.916<\/td>\n<td data-col-size=\"md\">21.251<\/td>\n<td data-col-size=\"md\">21.928<\/td>\n<td data-col-size=\"md\">22.575<\/td>\n<td data-col-size=\"md\">22.905<\/td>\n<td data-col-size=\"md\">23.243<\/td>\n<td data-col-size=\"md\">24.924<\/td>\n<td data-col-size=\"md\">25.573<\/td>\n<td data-col-size=\"md\">25.904<\/td>\n<td data-col-size=\"md\">26.243<\/td>\n<td data-col-size=\"md\">27.601<\/td>\n<td data-col-size=\"md\">28.571<\/td>\n<td data-col-size=\"md\">28.903<\/td>\n<td data-col-size=\"md\">29.242<\/td>\n<td data-col-size=\"md\">30.597<\/td>\n<td data-col-size=\"md\">31.57<\/td>\n<td data-col-size=\"md\">31.902<\/td>\n<td data-col-size=\"md\">33.274<\/td>\n<td data-col-size=\"md\">33.914<\/td>\n<td data-col-size=\"md\">34.569<\/td>\n<td data-col-size=\"md\">34.902<\/td>\n<td data-col-size=\"md\">36.27<\/td>\n<td data-col-size=\"md\">36.912<\/td>\n<td data-col-size=\"md\">37.568<\/td>\n<td data-col-size=\"md\">37.901<\/td>\n<td data-col-size=\"md\">39.267<\/td>\n<td data-col-size=\"md\">39.91<\/td>\n<td data-col-size=\"md\">40.567<\/td>\n<td data-col-size=\"md\">40.901<\/td>\n<td data-col-size=\"md\">42.264<\/td>\n<td data-col-size=\"md\">42.908<\/td>\n<td data-col-size=\"md\">43.566<\/td>\n<td data-col-size=\"md\">43.9<\/td>\n<td data-col-size=\"md\">45.249<\/td>\n<td data-col-size=\"md\">45.895<\/td>\n<td data-col-size=\"md\">46.556<\/td>\n<td data-col-size=\"md\">46.89<\/td>\n<td data-col-size=\"md\">49.247<\/td>\n<td data-col-size=\"md\">49.893<\/td>\n<td data-col-size=\"md\">50.555<\/td>\n<td data-col-size=\"md\">50.89<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" data-col-size=\"xs\">6g (Common)<\/td>\n<td data-col-size=\"xs\">\u6700\u5927\u9650\u5ea6<\/td>\n<td data-col-size=\"sm\">0.813<\/td>\n<td data-col-size=\"sm\">0.847<\/td>\n<td data-col-size=\"sm\">0.912<\/td>\n<td data-col-size=\"sm\">0.946<\/td>\n<td data-col-size=\"sm\">1.011<\/td>\n<td data-col-size=\"sm\">1.046<\/td>\n<td data-col-size=\"sm\">1.178<\/td>\n<td data-col-size=\"sm\">1.245<\/td>\n<td data-col-size=\"sm\">1.345<\/td>\n<td data-col-size=\"sm\">1.445<\/td>\n<td data-col-size=\"sm\">1.543<\/td>\n<td data-col-size=\"sm\">1.645<\/td>\n<td data-col-size=\"xs\">1.711<\/td>\n<td data-col-size=\"sm\">1.808<\/td>\n<td data-col-size=\"sm\">1.878<\/td>\n<td data-col-size=\"sm\">2.008<\/td>\n<td data-col-size=\"sm\">2.177<\/td>\n<td data-col-size=\"sm\">2.241<\/td>\n<td data-col-size=\"sm\">2.642<\/td>\n<td data-col-size=\"sm\">2.74<\/td>\n<td data-col-size=\"sm\">3.071<\/td>\n<td data-col-size=\"sm\">3.238<\/td>\n<td data-col-size=\"sm\">3.507<\/td>\n<td data-col-size=\"sm\">3.638<\/td>\n<td data-col-size=\"sm\">3.974<\/td>\n<td data-col-size=\"sm\">4.137<\/td>\n<td data-col-size=\"sm\">4.437<\/td>\n<td data-col-size=\"sm\">4.637<\/td>\n<td data-col-size=\"sm\">5.303<\/td>\n<td data-col-size=\"sm\">5.468<\/td>\n<td data-col-size=\"sm\">6.3<\/td>\n<td data-col-size=\"sm\">6.466<\/td>\n<td data-col-size=\"sm\">7.138<\/td>\n<td data-col-size=\"sm\">7.297<\/td>\n<td data-col-size=\"sm\">7.465<\/td>\n<td data-col-size=\"sm\">8.962<\/td>\n<td data-col-size=\"sm\">9.133<\/td>\n<td data-col-size=\"sm\">9.294<\/td>\n<td data-col-size=\"sm\">9.463<\/td>\n<td data-col-size=\"md\">10.789<\/td>\n<td data-col-size=\"md\">10.958<\/td>\n<td data-col-size=\"md\">11.122<\/td>\n<td data-col-size=\"md\">11.292<\/td>\n<td data-col-size=\"md\">12.625<\/td>\n<td data-col-size=\"md\">12.954<\/td>\n<td data-col-size=\"md\">13.291<\/td>\n<td data-col-size=\"md\">14.62<\/td>\n<td data-col-size=\"md\">14.952<\/td>\n<td data-col-size=\"md\">15.29<\/td>\n<td data-col-size=\"md\">16.282<\/td>\n<td data-col-size=\"md\">16.617<\/td>\n<td data-col-size=\"md\">16.95<\/td>\n<td data-col-size=\"md\">17.289<\/td>\n<td data-col-size=\"md\">18.278<\/td>\n<td data-col-size=\"md\">18.614<\/td>\n<td data-col-size=\"md\">18.949<\/td>\n<td data-col-size=\"md\">19.289<\/td>\n<td data-col-size=\"md\">20.274<\/td>\n<td data-col-size=\"md\">20.612<\/td>\n<td data-col-size=\"md\">20.942<\/td>\n<td data-col-size=\"md\">21.288<\/td>\n<td data-col-size=\"md\">21.947<\/td>\n<td data-col-size=\"md\">22.611<\/td>\n<td data-col-size=\"md\">22.941<\/td>\n<td data-col-size=\"md\">23.288<\/td>\n<td data-col-size=\"md\">24.942<\/td>\n<td data-col-size=\"md\">25.609<\/td>\n<td data-col-size=\"md\">25.939<\/td>\n<td data-col-size=\"md\">26.287<\/td>\n<td data-col-size=\"md\">27.603<\/td>\n<td data-col-size=\"md\">28.607<\/td>\n<td data-col-size=\"md\">28.939<\/td>\n<td data-col-size=\"md\">29.287<\/td>\n<td data-col-size=\"md\">30.598<\/td>\n<td data-col-size=\"md\">31.606<\/td>\n<td data-col-size=\"md\">31.938<\/td>\n<td data-col-size=\"md\">33.266<\/td>\n<td data-col-size=\"md\">33.932<\/td>\n<td data-col-size=\"md\">34.605<\/td>\n<td data-col-size=\"md\">34.937<\/td>\n<td data-col-size=\"md\">36.262<\/td>\n<td data-col-size=\"md\">36.93<\/td>\n<td data-col-size=\"md\">37.604<\/td>\n<td data-col-size=\"md\">37.937<\/td>\n<td data-col-size=\"md\">39.259<\/td>\n<td data-col-size=\"md\">39.928<\/td>\n<td data-col-size=\"md\">40.603<\/td>\n<td data-col-size=\"md\">40.936<\/td>\n<td data-col-size=\"md\">42.256<\/td>\n<td data-col-size=\"md\">42.927<\/td>\n<td data-col-size=\"md\">43.602<\/td>\n<td data-col-size=\"md\">43.936<\/td>\n<td data-col-size=\"md\">45.253<\/td>\n<td data-col-size=\"md\">45.919<\/td>\n<td data-col-size=\"md\">46.602<\/td>\n<td data-col-size=\"md\">46.936<\/td>\n<td data-col-size=\"md\">49.25<\/td>\n<td data-col-size=\"md\">49.917<\/td>\n<td data-col-size=\"md\">50.601<\/td>\n<td data-col-size=\"md\">50.935<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">\u654f<\/td>\n<td data-col-size=\"xs\">0.78<\/td>\n<td data-col-size=\"sm\">0.814<\/td>\n<td data-col-size=\"sm\">0.879<\/td>\n<td data-col-size=\"sm\">0.914<\/td>\n<td data-col-size=\"sm\">0.978<\/td>\n<td data-col-size=\"sm\">1.013<\/td>\n<td data-col-size=\"sm\">1.144<\/td>\n<td data-col-size=\"sm\">1.212<\/td>\n<td data-col-size=\"sm\">1.307<\/td>\n<td data-col-size=\"sm\">1.41<\/td>\n<td data-col-size=\"sm\">1.505<\/td>\n<td data-col-size=\"sm\">1.61<\/td>\n<td data-col-size=\"sm\">1.67<\/td>\n<td data-col-size=\"xs\">1.772<\/td>\n<td data-col-size=\"sm\">1.835<\/td>\n<td data-col-size=\"sm\">1.972<\/td>\n<td data-col-size=\"sm\">2.134<\/td>\n<td data-col-size=\"sm\">2.203<\/td>\n<td data-col-size=\"sm\">2.597<\/td>\n<td data-col-size=\"sm\">2.698<\/td>\n<td data-col-size=\"sm\">3.025<\/td>\n<td data-col-size=\"sm\">3.197<\/td>\n<td data-col-size=\"sm\">3.457<\/td>\n<td data-col-size=\"sm\">3.595<\/td>\n<td data-col-size=\"sm\">3.926<\/td>\n<td data-col-size=\"sm\">4.094<\/td>\n<td data-col-size=\"sm\">4.387<\/td>\n<td data-col-size=\"sm\">4.593<\/td>\n<td data-col-size=\"sm\">5.245<\/td>\n<td data-col-size=\"sm\">5.412<\/td>\n<td data-col-size=\"sm\">6.242<\/td>\n<td data-col-size=\"sm\">6.41<\/td>\n<td data-col-size=\"sm\">7.081<\/td>\n<td data-col-size=\"sm\">7.24<\/td>\n<td data-col-size=\"sm\">7.409<\/td>\n<td data-col-size=\"sm\">8.907<\/td>\n<td data-col-size=\"sm\">9.076<\/td>\n<td data-col-size=\"sm\">9.237<\/td>\n<td data-col-size=\"sm\">9.407<\/td>\n<td data-col-size=\"sm\">10.73<\/td>\n<td data-col-size=\"md\">10.894<\/td>\n<td data-col-size=\"md\">11.059<\/td>\n<td data-col-size=\"md\">11.229<\/td>\n<td data-col-size=\"md\">12.561<\/td>\n<td data-col-size=\"md\">12.891<\/td>\n<td data-col-size=\"md\">13.228<\/td>\n<td data-col-size=\"md\">14.557<\/td>\n<td data-col-size=\"md\">14.889<\/td>\n<td data-col-size=\"md\">15.227<\/td>\n<td data-col-size=\"md\">16.234<\/td>\n<td data-col-size=\"md\">16.553<\/td>\n<td data-col-size=\"md\">16.887<\/td>\n<td data-col-size=\"md\">17.226<\/td>\n<td data-col-size=\"md\">18.229<\/td>\n<td data-col-size=\"md\">18.551<\/td>\n<td data-col-size=\"md\">18.885<\/td>\n<td data-col-size=\"md\">19.225<\/td>\n<td data-col-size=\"md\">20.226<\/td>\n<td data-col-size=\"md\">20.549<\/td>\n<td data-col-size=\"md\">20.884<\/td>\n<td data-col-size=\"md\">21.225<\/td>\n<td data-col-size=\"md\">21.881<\/td>\n<td data-col-size=\"md\">22.537<\/td>\n<td data-col-size=\"md\">22.873<\/td>\n<td data-col-size=\"md\">23.217<\/td>\n<td data-col-size=\"md\">24.876<\/td>\n<td data-col-size=\"md\">25.535<\/td>\n<td data-col-size=\"md\">25.872<\/td>\n<td data-col-size=\"md\">26.217<\/td>\n<td data-col-size=\"md\">27.548<\/td>\n<td data-col-size=\"md\">28.533<\/td>\n<td data-col-size=\"md\">28.871<\/td>\n<td data-col-size=\"md\">29.216<\/td>\n<td data-col-size=\"md\">30.544<\/td>\n<td data-col-size=\"md\">31.532<\/td>\n<td data-col-size=\"md\">31.87<\/td>\n<td data-col-size=\"md\">33.214<\/td>\n<td data-col-size=\"md\">33.866<\/td>\n<td data-col-size=\"md\">34.531<\/td>\n<td data-col-size=\"md\">34.87<\/td>\n<td data-col-size=\"md\">36.21<\/td>\n<td data-col-size=\"md\">36.864<\/td>\n<td data-col-size=\"md\">37.53<\/td>\n<td data-col-size=\"md\">37.869<\/td>\n<td data-col-size=\"md\">39.207<\/td>\n<td data-col-size=\"md\">39.862<\/td>\n<td data-col-size=\"md\">40.529<\/td>\n<td data-col-size=\"md\">40.869<\/td>\n<td data-col-size=\"md\">42.204<\/td>\n<td data-col-size=\"md\">42.86<\/td>\n<td data-col-size=\"md\">43.528<\/td>\n<td data-col-size=\"md\">43.868<\/td>\n<td data-col-size=\"md\">45.189<\/td>\n<td data-col-size=\"md\">45.847<\/td>\n<td data-col-size=\"md\">46.518<\/td>\n<td data-col-size=\"md\">46.858<\/td>\n<td data-col-size=\"md\">49.187<\/td>\n<td data-col-size=\"md\">49.845<\/td>\n<td data-col-size=\"md\">50.517<\/td>\n<td data-col-size=\"md\">50.858<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" data-col-size=\"xs\">6f<\/td>\n<td data-col-size=\"xs\">\u6700\u5927\u9650\u5ea6<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">1.33<\/td>\n<td 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data-col-size=\"sm\">8.949<\/td>\n<td data-col-size=\"sm\">9.12<\/td>\n<td data-col-size=\"sm\">9.28<\/td>\n<td data-col-size=\"sm\">9.447<\/td>\n<td data-col-size=\"md\">10.775<\/td>\n<td data-col-size=\"md\">10.945<\/td>\n<td data-col-size=\"md\">11.108<\/td>\n<td data-col-size=\"md\">11.278<\/td>\n<td data-col-size=\"md\">12.611<\/td>\n<td data-col-size=\"md\">12.941<\/td>\n<td data-col-size=\"md\">13.277<\/td>\n<td data-col-size=\"md\">14.606<\/td>\n<td data-col-size=\"md\">14.939<\/td>\n<td data-col-size=\"md\">15.276<\/td>\n<td data-col-size=\"md\">16.266<\/td>\n<td data-col-size=\"md\">16.603<\/td>\n<td data-col-size=\"md\">16.937<\/td>\n<td data-col-size=\"md\">17.275<\/td>\n<td data-col-size=\"md\">18.262<\/td>\n<td data-col-size=\"md\">18.6<\/td>\n<td data-col-size=\"md\">18.936<\/td>\n<td data-col-size=\"md\">19.275<\/td>\n<td data-col-size=\"md\">20.258<\/td>\n<td data-col-size=\"md\">20.598<\/td>\n<td data-col-size=\"md\">20.929<\/td>\n<td 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data-col-size=\"md\">39.913<\/td>\n<td data-col-size=\"md\">40.589<\/td>\n<td data-col-size=\"md\">40.923<\/td>\n<td data-col-size=\"md\">42.241<\/td>\n<td data-col-size=\"md\">42.912<\/td>\n<td data-col-size=\"md\">43.588<\/td>\n<td data-col-size=\"md\">43.923<\/td>\n<td data-col-size=\"md\">45.238<\/td>\n<td data-col-size=\"md\">45.904<\/td>\n<td data-col-size=\"md\">46.588<\/td>\n<td data-col-size=\"md\">46.923<\/td>\n<td data-col-size=\"md\">49.235<\/td>\n<td data-col-size=\"md\">49.902<\/td>\n<td data-col-size=\"md\">50.587<\/td>\n<td data-col-size=\"md\">50.922<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">\u654f<\/td>\n<td data-col-size=\"xs\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">1.292<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td 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data-col-size=\"sm\">9.062<\/td>\n<td data-col-size=\"sm\">9.223<\/td>\n<td data-col-size=\"sm\">9.391<\/td>\n<td data-col-size=\"sm\">10.716<\/td>\n<td data-col-size=\"md\">10.881<\/td>\n<td data-col-size=\"md\">11.045<\/td>\n<td data-col-size=\"md\">11.215<\/td>\n<td data-col-size=\"md\">12.547<\/td>\n<td data-col-size=\"md\">12.878<\/td>\n<td data-col-size=\"md\">13.214<\/td>\n<td data-col-size=\"md\">14.543<\/td>\n<td data-col-size=\"md\">14.876<\/td>\n<td data-col-size=\"md\">15.213<\/td>\n<td data-col-size=\"md\">16.218<\/td>\n<td data-col-size=\"md\">16.539<\/td>\n<td data-col-size=\"md\">16.874<\/td>\n<td data-col-size=\"md\">17.212<\/td>\n<td data-col-size=\"md\">18.213<\/td>\n<td data-col-size=\"md\">18.537<\/td>\n<td data-col-size=\"md\">18.872<\/td>\n<td data-col-size=\"md\">19.211<\/td>\n<td data-col-size=\"md\">20.21<\/td>\n<td data-col-size=\"md\">20.535<\/td>\n<td data-col-size=\"md\">20.871<\/td>\n<td data-col-size=\"md\">21.211<\/td>\n<td data-col-size=\"md\">21.866<\/td>\n<td data-col-size=\"md\">22.523<\/td>\n<td data-col-size=\"md\">22.86<\/td>\n<td data-col-size=\"md\">23.203<\/td>\n<td data-col-size=\"md\">24.861<\/td>\n<td data-col-size=\"md\">25.521<\/td>\n<td data-col-size=\"md\">25.859<\/td>\n<td data-col-size=\"md\">26.203<\/td>\n<td data-col-size=\"md\">27.531<\/td>\n<td data-col-size=\"md\">28.519<\/td>\n<td data-col-size=\"md\">28.858<\/td>\n<td data-col-size=\"md\">29.202<\/td>\n<td data-col-size=\"md\">30.527<\/td>\n<td data-col-size=\"md\">31.518<\/td>\n<td data-col-size=\"md\">31.857<\/td>\n<td data-col-size=\"md\">33.199<\/td>\n<td data-col-size=\"md\">33.851<\/td>\n<td data-col-size=\"md\">34.517<\/td>\n<td data-col-size=\"md\">34.857<\/td>\n<td data-col-size=\"md\">36.195<\/td>\n<td data-col-size=\"md\">36.849<\/td>\n<td data-col-size=\"md\">37.516<\/td>\n<td data-col-size=\"md\">37.856<\/td>\n<td data-col-size=\"md\">39.192<\/td>\n<td data-col-size=\"md\">39.847<\/td>\n<td 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data-col-size=\"md\">40.57<\/td>\n<td data-col-size=\"md\">40.901<\/td>\n<td data-col-size=\"md\">42.221<\/td>\n<td data-col-size=\"md\">42.89<\/td>\n<td data-col-size=\"md\">43.569<\/td>\n<td data-col-size=\"md\">43.901<\/td>\n<td data-col-size=\"md\">45.218<\/td>\n<td data-col-size=\"md\">45.882<\/td>\n<td data-col-size=\"md\">46.569<\/td>\n<td data-col-size=\"md\">46.901<\/td>\n<td data-col-size=\"md\">49.215<\/td>\n<td data-col-size=\"md\">49.88<\/td>\n<td data-col-size=\"md\">50.568<\/td>\n<td data-col-size=\"md\">50.9<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">\u654f<\/td>\n<td data-col-size=\"xs\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"xs\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">2.567<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">2.993<\/td>\n<td data-col-size=\"sm\">–<\/td>\n<td data-col-size=\"sm\">3.423<\/td>\n<td data-col-size=\"sm\">3.565<\/td>\n<td data-col-size=\"sm\">3.892<\/td>\n<td data-col-size=\"sm\">4.064<\/td>\n<td data-col-size=\"sm\">4.351<\/td>\n<td data-col-size=\"sm\">4.563<\/td>\n<td data-col-size=\"sm\">5.211<\/td>\n<td data-col-size=\"sm\">5.378<\/td>\n<td data-col-size=\"sm\">6.208<\/td>\n<td data-col-size=\"sm\">6.376<\/td>\n<td data-col-size=\"sm\">7.046<\/td>\n<td data-col-size=\"sm\">7.206<\/td>\n<td data-col-size=\"sm\">7.375<\/td>\n<td data-col-size=\"sm\">8.872<\/td>\n<td data-col-size=\"sm\">9.041<\/td>\n<td data-col-size=\"sm\">9.203<\/td>\n<td data-col-size=\"sm\">9.373<\/td>\n<td data-col-size=\"sm\">10.693<\/td>\n<td data-col-size=\"md\">10.859<\/td>\n<td data-col-size=\"md\">11.024<\/td>\n<td data-col-size=\"md\">11.195<\/td>\n<td data-col-size=\"md\">12.528<\/td>\n<td data-col-size=\"md\">12.856<\/td>\n<td data-col-size=\"md\">13.194<\/td>\n<td data-col-size=\"md\">14.524<\/td>\n<td data-col-size=\"md\">14.854<\/td>\n<td data-col-size=\"md\">15.193<\/td>\n<td data-col-size=\"md\">16.196<\/td>\n<td data-col-size=\"md\">16.52<\/td>\n<td data-col-size=\"md\">16.852<\/td>\n<td data-col-size=\"md\">17.192<\/td>\n<td data-col-size=\"md\">18.192<\/td>\n<td data-col-size=\"md\">18.518<\/td>\n<td data-col-size=\"md\">18.85<\/td>\n<td data-col-size=\"md\">19.191<\/td>\n<td data-col-size=\"md\">20.188<\/td>\n<td data-col-size=\"md\">20.516<\/td>\n<td data-col-size=\"md\">20.849<\/td>\n<td data-col-size=\"md\">21.191<\/td>\n<td data-col-size=\"md\">21.844<\/td>\n<td data-col-size=\"md\">22.504<\/td>\n<td data-col-size=\"md\">22.838<\/td>\n<td data-col-size=\"md\">23.183<\/td>\n<td data-col-size=\"md\">24.839<\/td>\n<td data-col-size=\"md\">25.502<\/td>\n<td data-col-size=\"md\">25.837<\/td>\n<td data-col-size=\"md\">26.183<\/td>\n<td data-col-size=\"md\">27.511<\/td>\n<td data-col-size=\"md\">28.5<\/td>\n<td data-col-size=\"md\">28.836<\/td>\n<td data-col-size=\"md\">29.182<\/td>\n<td data-col-size=\"md\">30.507<\/td>\n<td data-col-size=\"md\">31.499<\/td>\n<td data-col-size=\"md\">31.835<\/td>\n<td data-col-size=\"md\">33.179<\/td>\n<td data-col-size=\"md\">33.829<\/td>\n<td data-col-size=\"md\">34.498<\/td>\n<td data-col-size=\"md\">34.835<\/td>\n<td data-col-size=\"md\">36.175<\/td>\n<td data-col-size=\"md\">36.827<\/td>\n<td data-col-size=\"md\">37.497<\/td>\n<td data-col-size=\"md\">37.834<\/td>\n<td data-col-size=\"md\">39.172<\/td>\n<td data-col-size=\"md\">39.825<\/td>\n<td data-col-size=\"md\">40.496<\/td>\n<td data-col-size=\"md\">40.834<\/td>\n<td data-col-size=\"md\">42.169<\/td>\n<td data-col-size=\"md\">42.823<\/td>\n<td data-col-size=\"md\">43.495<\/td>\n<td data-col-size=\"md\">43.833<\/td>\n<td data-col-size=\"md\">45.154<\/td>\n<td data-col-size=\"md\">45.81<\/td>\n<td data-col-size=\"md\">46.485<\/td>\n<td data-col-size=\"md\">46.823<\/td>\n<td data-col-size=\"md\">49.152<\/td>\n<td data-col-size=\"md\">49.808<\/td>\n<td data-col-size=\"md\">50.484<\/td>\n<td data-col-size=\"md\">50.823<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div>\n<h2 dir=\"auto\">Imperial External Thread Rolling Diameters Table<\/h2>\n<p dir=\"auto\">Nominal size in inches, diameters in mm. Standard: GB\/T34632-2017. Tolerance grades: 3A, 2A (common). Series: UNC, UNF, UNEF, UN.<\/p>\n<div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th rowspan=\"2\" data-col-size=\"xs\">Tolerance Grade<\/th>\n<th rowspan=\"2\" data-col-size=\"xs\">\u9650\u5236<\/th>\n<th data-col-size=\"xl\">0# 80 UNF<\/th>\n<th data-col-size=\"sm\">1# 64 UNC<\/th>\n<th data-col-size=\"sm\">1# 72 UNF<\/th>\n<th data-col-size=\"sm\">2# 56 UNC<\/th>\n<th data-col-size=\"sm\">2# 64 UNF<\/th>\n<th data-col-size=\"sm\">3# 48 UNC<\/th>\n<th data-col-size=\"sm\">3# 56 UNF<\/th>\n<th data-col-size=\"sm\">4# 40 UNC<\/th>\n<th data-col-size=\"sm\">4# 48 UNF<\/th>\n<th data-col-size=\"sm\">5# 40 UNC<\/th>\n<th data-col-size=\"sm\">5# 44 UNF<\/th>\n<th data-col-size=\"sm\">6# 32 UNC<\/th>\n<th data-col-size=\"sm\">6# 40 UNF<\/th>\n<th data-col-size=\"sm\">8# 32 UNC<\/th>\n<th data-col-size=\"sm\">8# 36 UNF<\/th>\n<th data-col-size=\"md\">10# 24 UNC<\/th>\n<th data-col-size=\"md\">10# 32 UNF<\/th>\n<th data-col-size=\"md\">12# 24 UNC<\/th>\n<th data-col-size=\"md\">12# 28 UNF<\/th>\n<th data-col-size=\"lg\">12# 32 UNEF<\/th>\n<th data-col-size=\"md\">1\/4 20 UNC<\/th>\n<th data-col-size=\"md\">1\/4 28 UNF<\/th>\n<th data-col-size=\"lg\">1\/4 32 UNEF<\/th>\n<th data-col-size=\"lg\">5\/16 18 UNC<\/th>\n<th data-col-size=\"lg\">5\/16 24 UNF<\/th>\n<th data-col-size=\"xl\">5\/16 32 UNEF<\/th>\n<th data-col-size=\"md\">3\/8 16 UNC<\/th>\n<th data-col-size=\"md\">3\/8 24 UNF<\/th>\n<th data-col-size=\"lg\">3\/8 32 UNEF<\/th>\n<th data-col-size=\"lg\">7\/16 14 UNC<\/th>\n<th data-col-size=\"md\">7\/16 16 UN<\/th>\n<th data-col-size=\"lg\">7\/16 20 UNF<\/th>\n<th data-col-size=\"xl\">7\/16 28 UNEF<\/th>\n<th data-col-size=\"md\">1\/2 13 UNC<\/th>\n<th data-col-size=\"sm\">1\/2 16 UN<\/th>\n<th data-col-size=\"md\">1\/2 20 UNF<\/th>\n<th data-col-size=\"lg\">1\/2 28 UNEF<\/th>\n<th data-col-size=\"lg\">9\/16 12 UNC<\/th>\n<th data-col-size=\"md\">9\/16 16 UN<\/th>\n<th data-col-size=\"lg\">9\/16 18 UNF<\/th>\n<th data-col-size=\"xl\">9\/16 24 UNEF<\/th>\n<th data-col-size=\"md\">5\/8 11 UNC<\/th>\n<th data-col-size=\"sm\">5\/8 12 UN<\/th>\n<th data-col-size=\"sm\">5\/8 16 UN<\/th>\n<th data-col-size=\"md\">5\/8 18 UNF<\/th>\n<th data-col-size=\"lg\">5\/8 24 UNEF<\/th>\n<th data-col-size=\"md\">3\/4 10 UNC<\/th>\n<th data-col-size=\"sm\">3\/4 12 UN<\/th>\n<th data-col-size=\"md\">3\/4 16 UNF<\/th>\n<th data-col-size=\"lg\">3\/4 20 UNEF<\/th>\n<th data-col-size=\"sm\">7\/8 9 UNC<\/th>\n<th data-col-size=\"sm\">7\/8 12 UN<\/th>\n<th data-col-size=\"md\">7\/8 14 UNF<\/th>\n<th data-col-size=\"sm\">7\/8 16 UN<\/th>\n<th data-col-size=\"lg\">7\/8 20 UNEF<\/th>\n<th data-col-size=\"xs\">1 8 UNC<\/th>\n<th data-col-size=\"sm\">1 12 UNF<\/th>\n<th data-col-size=\"xs\">1 16 UN<\/th>\n<th data-col-size=\"sm\">1 20 UNEF<\/th>\n<th data-col-size=\"lg\">1-1\/8 7 UNC<\/th>\n<th data-col-size=\"md\">1-1\/8 8 UN<\/th>\n<th data-col-size=\"xl\">1-1\/8 12 UNF<\/th>\n<th data-col-size=\"lg\">1-1\/8 16 UN<\/th>\n<th data-col-size=\"xl\">1-1\/8 18 UNEF<\/th>\n<th data-col-size=\"lg\">1-1\/4 7 UNC<\/th>\n<th data-col-size=\"md\">1-1\/4 8 UN<\/th>\n<th data-col-size=\"xl\">1-1\/4 12 UNF<\/th>\n<th data-col-size=\"lg\">1-1\/4 16 UN<\/th>\n<th data-col-size=\"xl\">1-1\/4 18 UNEF<\/th>\n<th data-col-size=\"lg\">1-3\/8 6 UNC<\/th>\n<th data-col-size=\"md\">1-3\/8 8 UN<\/th>\n<th data-col-size=\"xl\">1-3\/8 12 UNF<\/th>\n<th data-col-size=\"lg\">1-3\/8 16 UN<\/th>\n<th data-col-size=\"xl\">1-3\/8 18 UNEF<\/th>\n<th data-col-size=\"lg\">1-1\/2 6 UNC<\/th>\n<th data-col-size=\"md\">1-1\/2 8 UN<\/th>\n<th data-col-size=\"xl\">1-1\/2 12 UNF<\/th>\n<th data-col-size=\"lg\">1-1\/2 16 UN<\/th>\n<th data-col-size=\"xl\">1-1\/2 18 UNEF<\/th>\n<th data-col-size=\"md\">1-5\/8 8 UN<\/th>\n<th data-col-size=\"lg\">1-5\/8 12 UN<\/th>\n<th data-col-size=\"lg\">1-5\/8 16 UN<\/th>\n<th data-col-size=\"lg\">1-5\/8 18 UN<\/th>\n<th data-col-size=\"md\">1-3\/4 8 UN<\/th>\n<th data-col-size=\"lg\">1-3\/4 12 UN<\/th>\n<th data-col-size=\"lg\">1-3\/4 16 UN<\/th>\n<th data-col-size=\"md\">1-7\/8 8 UN<\/th>\n<th data-col-size=\"lg\">1-7\/8 12 UN<\/th>\n<th data-col-size=\"lg\">1-7\/8 16 UN<\/th>\n<th data-col-size=\"xs\">2 8 UN<\/th>\n<th data-col-size=\"xs\">2 12 UN<\/th>\n<th data-col-size=\"xs\">2 16 UN<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td rowspan=\"2\" data-col-size=\"xs\">3A<\/td>\n<td data-col-size=\"xs\">\u6700\u5927\u9650\u5ea6<\/td>\n<td colspan=\"92\" data-col-size=\"xl\">Data for max and min values would be inserted here based on standard GB\/T34632-2017. Note: Source code was truncated; refer to full standard for complete values.<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">\u654f<\/td>\n<td colspan=\"92\" data-col-size=\"xs\">Data for max and min values would be inserted here based on standard GB\/T34632-2017. Note: Source code was truncated; refer to full standard for complete values.<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" data-col-size=\"xs\">2A (Common)<\/td>\n<td data-col-size=\"xs\">\u6700\u5927\u9650\u5ea6<\/td>\n<td colspan=\"92\" data-col-size=\"xl\">Data for max and min values would be inserted here based on standard GB\/T34632-2017. Note: Source code was truncated; refer to full standard for complete values.<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">\u654f<\/td>\n<td colspan=\"92\" data-col-size=\"xs\">Data for max and min values would be inserted here based on standard GB\/T34632-2017. Note: Source code was truncated; refer to full standard for complete values.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\">Note: The imperial table data in the provided source was truncated. For complete and accurate values, consult the full GB\/T34632-2017 standard or equivalent ASME B1.1.<\/p>\n<\/div>\n<div>\n<h2 dir=\"auto\">Thread Tapping Hole Diameters<\/h2>\n<p dir=\"auto\">Thread tapping hole diameters are the recommended drill sizes for creating internal threads. These sizes ensure proper thread engagement, typically aiming for 75% thread height. Values are based on standard charts for metric and imperial threads. Adjust for material hardness and thread percentage as needed.<\/p>\n<h3 dir=\"auto\">Metric Tapping Hole Diameters<\/h3>\n<div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th data-col-size=\"xs\">Tap Size<\/th>\n<th data-col-size=\"sm\">Pitch (mm)<\/th>\n<th data-col-size=\"sm\">Drill Size (mm)<\/th>\n<th data-col-size=\"sm\">Closest Imperial Drill<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-col-size=\"xs\">M1.6<\/td>\n<td data-col-size=\"sm\">0.35<\/td>\n<td data-col-size=\"sm\">1.25<\/td>\n<td data-col-size=\"sm\">3\/64″<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M2<\/td>\n<td data-col-size=\"sm\">0.4<\/td>\n<td data-col-size=\"sm\">1.6<\/td>\n<td data-col-size=\"sm\">1\/16″<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M2.5<\/td>\n<td data-col-size=\"sm\">0.45<\/td>\n<td data-col-size=\"sm\">2.05<\/td>\n<td data-col-size=\"sm\">#46<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M3<\/td>\n<td data-col-size=\"sm\">0.5<\/td>\n<td data-col-size=\"sm\">2.5<\/td>\n<td data-col-size=\"sm\">#39<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M4<\/td>\n<td data-col-size=\"sm\">0.7<\/td>\n<td data-col-size=\"sm\">3.3<\/td>\n<td data-col-size=\"sm\">#30<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M5<\/td>\n<td data-col-size=\"sm\">0.8<\/td>\n<td data-col-size=\"sm\">4.2<\/td>\n<td data-col-size=\"sm\">#19<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M6<\/td>\n<td data-col-size=\"sm\">1<\/td>\n<td data-col-size=\"sm\">5<\/td>\n<td data-col-size=\"sm\">#8<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M8<\/td>\n<td data-col-size=\"sm\">1.25<\/td>\n<td data-col-size=\"sm\">6.8<\/td>\n<td data-col-size=\"sm\">17\/64″<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M10<\/td>\n<td data-col-size=\"sm\">1.5<\/td>\n<td data-col-size=\"sm\">8.5<\/td>\n<td data-col-size=\"sm\">\u95ee<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"xs\">M12<\/td>\n<td data-col-size=\"sm\">1.75<\/td>\n<td data-col-size=\"sm\">10.2<\/td>\n<td data-col-size=\"sm\">13\/32″<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">Imperial Tapping Hole Diameters<\/h3>\n<div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th data-col-size=\"md\">Tap Size<\/th>\n<th data-col-size=\"xs\">TPI<\/th>\n<th data-col-size=\"xs\">Drill Size<\/th>\n<th data-col-size=\"lg\">Decimal Equivalent (in)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-col-size=\"md\">0-80<\/td>\n<td data-col-size=\"xs\">80<\/td>\n<td data-col-size=\"xs\">3\/64<\/td>\n<td data-col-size=\"lg\">0.0469<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">1-64<\/td>\n<td data-col-size=\"xs\">64<\/td>\n<td data-col-size=\"xs\">53<\/td>\n<td data-col-size=\"lg\">0.0595<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">2-56<\/td>\n<td data-col-size=\"xs\">56<\/td>\n<td data-col-size=\"xs\">50<\/td>\n<td data-col-size=\"lg\">0.0700<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">3-48<\/td>\n<td data-col-size=\"xs\">48<\/td>\n<td data-col-size=\"xs\">47<\/td>\n<td data-col-size=\"lg\">0.0785<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">4-40<\/td>\n<td data-col-size=\"xs\">40<\/td>\n<td data-col-size=\"xs\">43<\/td>\n<td data-col-size=\"lg\">0.0890<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">5-40<\/td>\n<td data-col-size=\"xs\">40<\/td>\n<td data-col-size=\"xs\">38<\/td>\n<td data-col-size=\"lg\">0.1015<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">6-32<\/td>\n<td data-col-size=\"xs\">32<\/td>\n<td data-col-size=\"xs\">36<\/td>\n<td data-col-size=\"lg\">0.1065<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">8-32<\/td>\n<td data-col-size=\"xs\">32<\/td>\n<td data-col-size=\"xs\">29<\/td>\n<td data-col-size=\"lg\">0.1360<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">10-24<\/td>\n<td data-col-size=\"xs\">24<\/td>\n<td data-col-size=\"xs\">25<\/td>\n<td data-col-size=\"lg\">0.1495<\/td>\n<\/tr>\n<tr>\n<td data-col-size=\"md\">1\/4-20<\/td>\n<td data-col-size=\"xs\">20<\/td>\n<td data-col-size=\"xs\">7<\/td>\n<td data-col-size=\"lg\">0.2010<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\">For roll forming taps, the drill size can be calculated as: Tap Drill Size = Basic Tap O.D. – (Pitch x % Thread Desired \/ 76.98) for imperial, or adjusted for metric.<\/p>\n<\/div>\n<div>\n<h2 dir=\"auto\">\u5e38\u89c1\u95ee\u9898\u89e3\u7b54 (FAQ)<\/h2>\n<dl>\n<dt>What is the difference between rolling diameter and tapping hole diameter?<\/dt>\n<dd>Rolling diameter is for external thread blank preparation in manufacturing, while tapping hole diameter is the drill size for internal threads to ensure proper tapping.<\/dd>\n<dd><\/dd>\n<dt>Why choose 6g tolerance for metric threads?<\/dt>\n<dd>6g is commonly used for general-purpose external threads as it provides a balance between fit and manufacturability, allowing slight clearance for assembly.<\/dd>\n<dd><\/dd>\n<dt>How does material affect these diameters?<\/dt>\n<dd>Harder materials may require slightly larger blank diameters for rolling to avoid cracking, and tapping holes might need adjustment for better chip evacuation.<\/dd>\n<dd><\/dd>\n<dt>What standard should I reference for imperial threads?<\/dt>\n<dd>GB\/T34632-2017 aligns with ASME B1.1 for unified threads, ensuring compatibility in international manufacturing.<\/dd>\n<dd><\/dd>\n<dt>Can I use these tables for roll forming internal threads?<\/dt>\n<dd>No, these are for external rolling and standard tapping. For roll forming taps, use specific formulas to calculate hole sizes based on desired thread percentage.<\/dd>\n<dd><\/dd>\n<dt>How to select the correct drill size for 75% thread engagement?<\/dt>\n<dd>Use the provided charts or formula: Drill diameter = Major diameter – (1.0825 x Pitch) for approximate 75% in steel\/aluminum.<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction to Thread Rolling Diameters Thread rolling diameter, also known as blank diameter or rolling blank diameter, refers to the diameter of the external thread (screw) blank before the rolling or forming process. This is the smooth rod diameter prior to thread formation. It is a critical process parameter in screw manufacturing, distinct from major, [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5777","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/posts\/5777","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/comments?post=5777"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/posts\/5777\/revisions"}],"predecessor-version":[{"id":5779,"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/posts\/5777\/revisions\/5779"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/media?parent=5777"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/categories?post=5777"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/zh\/wp-json\/wp\/v2\/tags?post=5777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}