\n| M64<\/td>\n | 32<\/td>\n | 95<\/td>\n | 63.92<\/td>\n | 63.32<\/td>\n | 60.023<\/td>\n | 59.743<\/td>\n | 0.75<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n un<\/sup> Voir le chapitre 7 et le tableau 9 de la norme GB\/T 197-2003 pour plus de d\u00e9tails sur le rayon de courbure \u00e0 l'embase. Ces param\u00e8tres garantissent la r\u00e9partition des contraintes et la r\u00e9sistance \u00e0 la fatigue.<\/p>\n<\/div>\n\n Filetages internes \u00e0 pas fin<\/h2>\nPr\u00e9cision moyenne, engagement moyen, zone de tol\u00e9rance de 6H. Les pas fins offrent une meilleure r\u00e9sistance aux vibrations et une pr\u00e9cision de r\u00e9glage accrue.<\/p>\n \n \n\n\n| Fil<\/th>\n | Dur\u00e9e de l'engagement<\/th>\n | Diam\u00e8tre primitif D2<\/sub><\/th>\nDiam\u00e8tre mineur D1<\/sub><\/th>\n<\/tr>\n\n| ><\/th>\n | \u2264<\/th>\n | max<\/th>\n | min<\/th>\n | max<\/th>\n | min<\/th>\n<\/tr>\n<\/thead>\n | \n\n| M8\u00d71<\/td>\n | 3<\/td>\n | 9<\/td>\n | 7.5<\/td>\n | 7.35<\/td>\n | 7.153<\/td>\n | 6.917<\/td>\n<\/tr>\n | \n| M10\u00d71<\/td>\n | 4<\/td>\n | 12<\/td>\n | 9.5<\/td>\n | 9.35<\/td>\n | 9.153<\/td>\n | 8.917<\/td>\n<\/tr>\n | \n| M10\u00d71,25<\/td>\n | 4<\/td>\n | 12<\/td>\n | 9.348<\/td>\n | 9.188<\/td>\n | 8.912<\/td>\n | 8.647<\/td>\n<\/tr>\n | \n| M12\u00d71,25<\/td>\n | 4.5<\/td>\n | 13<\/td>\n | 11.368<\/td>\n | 11.188<\/td>\n | 10.912<\/td>\n | 10.647<\/td>\n<\/tr>\n | \n| M12\u00d71,5<\/td>\n | 4.5<\/td>\n | 13<\/td>\n | 11.216<\/td>\n | 11.026<\/td>\n | 10.676<\/td>\n | 10.376<\/td>\n<\/tr>\n | \n| M14\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 13.216<\/td>\n | 13.026<\/td>\n | 12.676<\/td>\n | 12.376<\/td>\n<\/tr>\n | \n| M16\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 15.216<\/td>\n | 15.026<\/td>\n | 14.676<\/td>\n | 14.376<\/td>\n<\/tr>\n | \n| M18\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 17.216<\/td>\n | 17.026<\/td>\n | 16.676<\/td>\n | 16.376<\/td>\n<\/tr>\n | \n| M18\u00d72<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 16.913<\/td>\n | 16.701<\/td>\n | 16.21<\/td>\n | 15.835<\/td>\n<\/tr>\n | \n| M20\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 19.216<\/td>\n | 19.026<\/td>\n | 18.676<\/td>\n | 18.376<\/td>\n<\/tr>\n | \n| M20\u00d72<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 18.913<\/td>\n | 18.701<\/td>\n | 18.21<\/td>\n | 17.835<\/td>\n<\/tr>\n | \n| M22\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 21.216<\/td>\n | 21.026<\/td>\n | 20.676<\/td>\n | 20.376<\/td>\n<\/tr>\n | \n| M22\u00d72<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 20.913<\/td>\n | 20.701<\/td>\n | 20.21<\/td>\n | 19.835<\/td>\n<\/tr>\n | \n| M24\u00d72<\/td>\n | 8.5<\/td>\n | 25<\/td>\n | 22.925<\/td>\n | 22.701<\/td>\n | 22.21<\/td>\n | 21.835<\/td>\n<\/tr>\n | \n| M27\u00d72<\/td>\n | 8.5<\/td>\n | 25<\/td>\n | 25.925<\/td>\n | 25.701<\/td>\n | 25.21<\/td>\n | 24.835<\/td>\n<\/tr>\n | \n| M30\u00d72<\/td>\n | 8.5<\/td>\n | 25<\/td>\n | 28.925<\/td>\n | 28.701<\/td>\n | 28.21<\/td>\n | 27.835<\/td>\n<\/tr>\n | \n| M33\u00d72<\/td>\n | 8.5<\/td>\n | 25<\/td>\n | 31.925<\/td>\n | 31.701<\/td>\n | 31.21<\/td>\n | 30.835<\/td>\n<\/tr>\n | \n| M36\u00d73<\/td>\n | 12<\/td>\n | 36<\/td>\n | 34.316<\/td>\n | 34.051<\/td>\n | 33.252<\/td>\n | 32.752<\/td>\n<\/tr>\n | \n| M39\u00d73<\/td>\n | 12<\/td>\n | 36<\/td>\n | 37.316<\/td>\n | 37.051<\/td>\n | 36.252<\/td>\n | 35.752<\/td>\n<\/tr>\n | \n| M42\u00d73<\/td>\n | 12<\/td>\n | 36<\/td>\n | 40.316<\/td>\n | 40.051<\/td>\n | 39.252<\/td>\n | 38.752<\/td>\n<\/tr>\n | \n| M45\u00d73<\/td>\n | 12<\/td>\n | 36<\/td>\n | 43.316<\/td>\n | 43.051<\/td>\n | 42.252<\/td>\n | 41.752<\/td>\n<\/tr>\n | \n| M48\u00d73<\/td>\n | 15<\/td>\n | 45<\/td>\n | 46.331<\/td>\n | 46.051<\/td>\n | 45.252<\/td>\n | 44.752<\/td>\n<\/tr>\n | \n| M52\u00d74<\/td>\n | 19<\/td>\n | 56<\/td>\n | 49.717<\/td>\n | 49.402<\/td>\n | 48.27<\/td>\n | 47.67<\/td>\n<\/tr>\n | \n| M56\u00d74<\/td>\n | 19<\/td>\n | 56<\/td>\n | 53.717<\/td>\n | 53.402<\/td>\n | 52.27<\/td>\n | 51.67<\/td>\n<\/tr>\n | \n| M60\u00d74<\/td>\n | 19<\/td>\n | 56<\/td>\n | 57.717<\/td>\n | 57.402<\/td>\n | 56.27<\/td>\n | 55.67<\/td>\n<\/tr>\n | \n| M64\u00d74<\/td>\n | 19<\/td>\n | 56<\/td>\n | 61.717<\/td>\n | 61.402<\/td>\n | 60.27<\/td>\n | 59.67<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n Ces valeurs permettent une r\u00e9partition plus fine de la charge dans les environnements \u00e0 fortes vibrations.<\/p>\n<\/div>\n \n Filetages externes \u00e0 pas fin<\/h2>\nPr\u00e9cision moyenne, engagement moyen, zone de tol\u00e9rance de 6 g. Offre des sections centrales plus robustes pour une r\u00e9sistance au cisaillement accrue.<\/p>\n \n \n\n\n| Fil<\/th>\n | Dur\u00e9e de l'engagement<\/th>\n | Diam\u00e8tre majeur d<\/th>\n | Diam\u00e8tre primitif d2<\/sub><\/th>\nRayon minimal de la racineun<\/sup><\/th>\n<\/tr>\n\n| ><\/th>\n | \u2264<\/th>\n | max<\/th>\n | min<\/th>\n | max<\/th>\n | min<\/th>\n | min<\/th>\n<\/tr>\n<\/thead>\n | \n\n| M8\u00d71<\/td>\n | 3<\/td>\n | 9<\/td>\n | 7.974<\/td>\n | 7.794<\/td>\n | 7.324<\/td>\n | 7.212<\/td>\n | 0.125<\/td>\n<\/tr>\n | \n| M10\u00d71<\/td>\n | 4<\/td>\n | 12<\/td>\n | 9.974<\/td>\n | 9.794<\/td>\n | 9.324<\/td>\n | 9.212<\/td>\n | 0.125<\/td>\n<\/tr>\n | \n| M10\u00d71,25<\/td>\n | 4<\/td>\n | 12<\/td>\n | 9.972<\/td>\n | 9.76<\/td>\n | 9.16<\/td>\n | 9.042<\/td>\n | 0.156<\/td>\n<\/tr>\n | \n| M12\u00d71,25<\/td>\n | 4.5<\/td>\n | 13<\/td>\n | 11.972<\/td>\n | 11.76<\/td>\n | 11.16<\/td>\n | 11.028<\/td>\n | 0.156<\/td>\n<\/tr>\n | \n| M12\u00d71,5<\/td>\n | 4.5<\/td>\n | 13<\/td>\n | 11.968<\/td>\n | 11.732<\/td>\n | 10.994<\/td>\n | 10.854<\/td>\n | 0.188<\/td>\n<\/tr>\n | \n| M14\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 13.968<\/td>\n | 13.732<\/td>\n | 12.994<\/td>\n | 12.854<\/td>\n | 0.188<\/td>\n<\/tr>\n | \n| M16\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 15.968<\/td>\n | 15.732<\/td>\n | 14.994<\/td>\n | 14.854<\/td>\n | 0.188<\/td>\n<\/tr>\n | \n| M18\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 17.968<\/td>\n | 17.732<\/td>\n | 16.994<\/td>\n | 16.854<\/td>\n | 0.188<\/td>\n<\/tr>\n | \n| M18\u00d72<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 17.962<\/td>\n | 17.682<\/td>\n | 16.663<\/td>\n | 16.503<\/td>\n | 0.25<\/td>\n<\/tr>\n | \n| M20\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 19.968<\/td>\n | 19.732<\/td>\n | 18.994<\/td>\n | 18.854<\/td>\n | 0.188<\/td>\n<\/tr>\n | \n| M20\u00d72<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 19.962<\/td>\n | 19.682<\/td>\n | 18.663<\/td>\n | 18.503<\/td>\n | 0.25<\/td>\n<\/tr>\n | \n| M22\u00d71,5<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 21.968<\/td>\n | 21.732<\/td>\n | 20.994<\/td>\n | 20.854<\/td>\n | 0.188<\/td>\n<\/tr>\n | \n| M22\u00d72<\/td>\n | 5.6<\/td>\n | 16<\/td>\n | 21.962<\/td>\n | 21.682<\/td>\n | 20.663<\/td>\n | 20.503<\/td>\n | 0.25<\/td>\n<\/tr>\n | \n| M24\u00d72<\/td>\n | 8.5<\/td>\n | 25<\/td>\n | 23.962<\/td>\n | 23.682<\/td>\n | 22.663<\/td>\n | 22.493<\/td>\n | 0.25<\/td>\n<\/tr>\n | \n| M27\u00d72<\/td>\n | 8.5<\/td>\n | 25<\/td>\n | 26.962<\/td>\n | 26.682<\/td>\n | 25.663<\/td>\n | 25.493<\/td>\n | 0.25<\/td>\n<\/tr>\n | \n| M30\u00d72<\/td>\n | 8.5<\/td>\n | 25<\/td>\n | 29.962<\/td>\n | 29.682<\/td>\n | 28.663<\/td>\n | 28.493<\/td>\n | 0.25<\/td>\n<\/tr>\n | \n| M33\u00d72<\/td>\n | 8.5<\/td>\n | 25<\/td>\n | 32.962<\/td>\n | 32.682<\/td>\n | 31.663<\/td>\n | 31.493<\/td>\n | 0.25<\/td>\n<\/tr>\n | \n| M36\u00d73<\/td>\n | 12<\/td>\n | 36<\/td>\n | 35.952<\/td>\n | 35.577<\/td>\n | 34.003<\/td>\n | 33.803<\/td>\n | 0.375<\/td>\n<\/tr>\n | \n| M39\u00d73<\/td>\n | 12<\/td>\n | 36<\/td>\n | 38.952<\/td>\n | 38.577<\/td>\n | 37.003<\/td>\n | 36.803<\/td>\n | 0.375<\/td>\n<\/tr>\n | \n| M42\u00d73<\/td>\n | 12<\/td>\n | 36<\/td>\n | 41.952<\/td>\n | 41.577<\/td>\n | 40.003<\/td>\n | 39.803<\/td>\n | 0.375<\/td>\n<\/tr>\n | \n| M45\u00d73<\/td>\n | 12<\/td>\n | 36<\/td>\n | 44.952<\/td>\n | 44.577<\/td>\n | 43.003<\/td>\n | 42.803<\/td>\n | 0.375<\/td>\n<\/tr>\n | \n| M48\u00d73<\/td>\n | 15<\/td>\n | 45<\/td>\n | 47.952<\/td>\n | 47.577<\/td>\n | 46.003<\/td>\n | 45.791<\/td>\n | 0.375<\/td>\n<\/tr>\n | \n| M52\u00d74<\/td>\n | 19<\/td>\n | 56<\/td>\n | 51.94<\/td>\n | 51.465<\/td>\n | 49.342<\/td>\n | 49.106<\/td>\n | 0.5<\/td>\n<\/tr>\n | \n| M56\u00d74<\/td>\n | 19<\/td>\n | 56<\/td>\n | 55.94<\/td>\n | 55.465<\/td>\n | 53.342<\/td>\n | 53.106<\/td>\n | 0.5<\/td>\n<\/tr>\n | \n| M60\u00d74<\/td>\n | 19<\/td>\n | 56<\/td>\n | 59.94<\/td>\n | 59.465<\/td>\n | 57.342<\/td>\n | 57.106<\/td>\n | 0.5<\/td>\n<\/tr>\n | \n| M64\u00d74<\/td>\n | 19<\/td>\n | 56<\/td>\n | 63.94<\/td>\n | 63.465<\/td>\n | 61.342<\/td>\n | 61.106<\/td>\n | 0.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n un<\/sup> Voir GB\/T 197-2003 pour les sp\u00e9cifications du rayon de racine, essentiel pour \u00e9viter les concentrations de contraintes.<\/p>\n<\/div>\n\n FAQ<\/h2>\nQuelles sont les zones de tol\u00e9rance applicables aux filetages internes grossiers\u00a0?<\/h3>\n5H pour les diam\u00e8tres \u22641,4 mm ; 6H pour >1,4 mm, assurant un ajustement de pr\u00e9cision moyen.<\/p>\n Comment le placage affecte-t-il les dimensions du filetage\u00a0?<\/h3>\nLes tol\u00e9rances sont avant le placage ; les profils apr\u00e8s placage ne doivent pas d\u00e9passer les positions H\/h pour les rev\u00eatements minces afin de maintenir l'assemblage.<\/p>\n Pourquoi utiliser des filetages \u00e0 pas fin ?<\/h3>\nIls offrent une meilleure r\u00e9sistance aux vibrations et des r\u00e9glages plus pr\u00e9cis, avec des noyaux plus r\u00e9sistants selon les limites des tableaux 3 et 4.<\/p>\n Quelle est la dur\u00e9e d'engagement moyenne\u00a0?<\/h3>\nIl permet d'\u00e9quilibrer la r\u00e9sistance du filetage et son co\u00fbt\u00a0; utilisez les valeurs du tableau pour des plages sp\u00e9cifiques afin d'\u00e9viter un sur- ou sous-engagement.<\/p>\n Comment interpr\u00e9ter le rayon de la racine ?<\/h3>\nLes valeurs minimales selon la norme GB\/T 197-2003 r\u00e9duisent les contraintes ; essentielles pour les applications sujettes \u00e0 la fatigue.<\/p>\n Ces limites s'appliquent-elles \u00e0 tous les mat\u00e9riaux\u00a0?<\/h3>\nOui, mais tenez compte des rev\u00eatements sp\u00e9ciaux\u00a0; consultez la norme pour les rev\u00eatements \u00e9pais n\u00e9cessitant des filetages surdimensionn\u00e9s.<\/p>\n<\/div>\n [\/et_pb_text][\/et_pb_column] \n\t\t\t[\/et_pb_row] \n\t\t[\/et_pb_section]<\/p>","protected":false},"excerpt":{"rendered":" Introduction to GB\/T 9145-2003 Standard This standard specifies limit dimensions for general-purpose metric screw threads of medium accuracy in the preferred series, ensuring interchangeability and performance in mechanical assemblies. It covers coarse and fine pitch threads for internal and external applications, with tolerances applied before plating for thin coatings. Scope GB\/T 9145-2003 defines the limit […]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":" \r\n Introduction to GB\/T 9145-2003 Standard<\/h2>\r\nThis standard specifies limit dimensions for general-purpose metric screw threads of medium accuracy in the preferred series, ensuring interchangeability and performance in mechanical assemblies. It covers coarse and fine pitch threads for internal and external applications, with tolerances applied before plating for thin coatings.\r\n\r\n<\/div>\r\n\r\n Scope<\/h2>\r\nGB\/T 9145-2003 defines the limit dimensions for metric screw threads with medium tolerance precision and preferred series, applicable to general engineering purposes. It ensures that thread profiles do not exceed the maximum material condition defined by basic profiles and tolerance positions. This is crucial for fasteners in industries requiring reliable mating without interference, especially post-plating.\r\n\r\n \t- Applies to threads before thin coatings like electroplating.<\/li>\r\n \t
- Post-plating, profiles must stay within H or h positions.<\/li>\r\n \t
- Focuses on medium engagement lengths for balanced strength and manufacturability.<\/li>\r\n<\/ul>\r\n<\/div>\r\n
\r\n General Limit Dimensions<\/h2>\r\nNo point on the thread root profile shall exceed the maximum entity profile per basic form and tolerance. For plated threads, actual contours post-plating must not surpass H\/h positions. This prevents over-tightening or failure in assemblies. Note: Tolerances suit thin platings; heavier coatings require adjustments.\r\n\r\n<\/div>\r\n\r\n Coarse Pitch Internal Threads<\/h2>\r\nFor medium precision, engagement length is medium. Tolerance zones: 5H for d \u2264 1.4 mm; 6H for d > 1.4 mm. Limits for pitch diameter D2<\/sub> and minor diameter D1<\/sub> ensure proper fit with external threads.\r\n\r\n \r\n\r\n\r\n| Thread<\/th>\r\n | Engagement Length<\/th>\r\n | Pitch Diameter D2<\/sub><\/th>\r\nMinor Diameter D1<\/sub><\/th>\r\n<\/tr>\r\n\r\n| ><\/th>\r\n | \u2264<\/th>\r\n | max<\/th>\r\n | min<\/th>\r\n | max<\/th>\r\n | min<\/th>\r\n<\/tr>\r\n<\/thead>\r\n | \r\n\r\n| M1<\/td>\r\n | 0.6<\/td>\r\n | 1.7<\/td>\r\n | 0.894<\/td>\r\n | 0.838<\/td>\r\n | 0.785<\/td>\r\n | 0.729<\/td>\r\n<\/tr>\r\n | \r\n| M1.2<\/td>\r\n | 0.6<\/td>\r\n | 1.7<\/td>\r\n | 1.094<\/td>\r\n | 1.038<\/td>\r\n | 0.985<\/td>\r\n | 0.929<\/td>\r\n<\/tr>\r\n | \r\n| M1.4<\/td>\r\n | 0.7<\/td>\r\n | 2<\/td>\r\n | 1.265<\/td>\r\n | 1.205<\/td>\r\n | 1.142<\/td>\r\n | 1.075<\/td>\r\n<\/tr>\r\n | \r\n| M1.6<\/td>\r\n | 0.8<\/td>\r\n | 2.6<\/td>\r\n | 1.458<\/td>\r\n | 1.373<\/td>\r\n | 1.321<\/td>\r\n | 1.221<\/td>\r\n<\/tr>\r\n | \r\n| M1.8<\/td>\r\n | 0.8<\/td>\r\n | 2.6<\/td>\r\n | 1.658<\/td>\r\n | 1.573<\/td>\r\n | 1.521<\/td>\r\n | 1.421<\/td>\r\n<\/tr>\r\n | \r\n| M2<\/td>\r\n | 1<\/td>\r\n | 3<\/td>\r\n | 1.83<\/td>\r\n | 1.74<\/td>\r\n | 1.679<\/td>\r\n | 1.567<\/td>\r\n<\/tr>\r\n | \r\n| M2.5<\/td>\r\n | 1.3<\/td>\r\n | 3.8<\/td>\r\n | 2.303<\/td>\r\n | 2.208<\/td>\r\n | 2.138<\/td>\r\n | 2.013<\/td>\r\n<\/tr>\r\n | \r\n| M3<\/td>\r\n | 1.5<\/td>\r\n | 4.5<\/td>\r\n | 2.775<\/td>\r\n | 2.675<\/td>\r\n | 2.599<\/td>\r\n | 2.459<\/td>\r\n<\/tr>\r\n | \r\n| M3.5<\/td>\r\n | 1.7<\/td>\r\n | 5<\/td>\r\n | 3.222<\/td>\r\n | 3.11<\/td>\r\n | 3.01<\/td>\r\n | 2.85<\/td>\r\n<\/tr>\r\n | \r\n| M4<\/td>\r\n | 2<\/td>\r\n | 6<\/td>\r\n | 3.663<\/td>\r\n | 3.545<\/td>\r\n | 3.422<\/td>\r\n | 3.242<\/td>\r\n<\/tr>\r\n | \r\n| M5<\/td>\r\n | 2.5<\/td>\r\n | 7.5<\/td>\r\n | 4.605<\/td>\r\n | 4.48<\/td>\r\n | 4.334<\/td>\r\n | 4.134<\/td>\r\n<\/tr>\r\n | \r\n| M6<\/td>\r\n | 3<\/td>\r\n | 9<\/td>\r\n | 5.5<\/td>\r\n | 5.35<\/td>\r\n | 5.153<\/td>\r\n | 4.917<\/td>\r\n<\/tr>\r\n | \r\n| M7<\/td>\r\n | 3<\/td>\r\n | 9<\/td>\r\n | 6.5<\/td>\r\n | 6.35<\/td>\r\n | 6.153<\/td>\r\n | 5.917<\/td>\r\n<\/tr>\r\n | \r\n| M8<\/td>\r\n | 4<\/td>\r\n | 12<\/td>\r\n | 7.348<\/td>\r\n | 7.188<\/td>\r\n | 6.912<\/td>\r\n | 6.647<\/td>\r\n<\/tr>\r\n | \r\n| M10<\/td>\r\n | 5<\/td>\r\n | 15<\/td>\r\n | 9.206<\/td>\r\n | 9.026<\/td>\r\n | 8.676<\/td>\r\n | 8.376<\/td>\r\n<\/tr>\r\n | \r\n| M12<\/td>\r\n | 6<\/td>\r\n | 18<\/td>\r\n | 11.063<\/td>\r\n | 10.863<\/td>\r\n | 10.441<\/td>\r\n | 10.106<\/td>\r\n<\/tr>\r\n | \r\n| M14<\/td>\r\n | 8<\/td>\r\n | 24<\/td>\r\n | 12.913<\/td>\r\n | 12.701<\/td>\r\n | 12.21<\/td>\r\n | 11.835<\/td>\r\n<\/tr>\r\n | \r\n| M16<\/td>\r\n | 8<\/td>\r\n | 24<\/td>\r\n | 14.913<\/td>\r\n | 14.701<\/td>\r\n | 14.21<\/td>\r\n | 13.835<\/td>\r\n<\/tr>\r\n | \r\n| M18<\/td>\r\n | 10<\/td>\r\n | 30<\/td>\r\n | 16.6<\/td>\r\n | 16.376<\/td>\r\n | 15.744<\/td>\r\n | 15.294<\/td>\r\n<\/tr>\r\n | \r\n| M20<\/td>\r\n | 10<\/td>\r\n | 30<\/td>\r\n | 18.6<\/td>\r\n | 18.376<\/td>\r\n | 17.744<\/td>\r\n | 17.294<\/td>\r\n<\/tr>\r\n | \r\n| M22<\/td>\r\n | 10<\/td>\r\n | 30<\/td>\r\n | 20.6<\/td>\r\n | 20.376<\/td>\r\n | 19.744<\/td>\r\n | 19.294<\/td>\r\n<\/tr>\r\n | \r\n| M24<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 22.316<\/td>\r\n | 22.051<\/td>\r\n | 21.252<\/td>\r\n | 20.752<\/td>\r\n<\/tr>\r\n | \r\n| M27<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 25.316<\/td>\r\n | 25.051<\/td>\r\n | 24.252<\/td>\r\n | 23.752<\/td>\r\n<\/tr>\r\n | \r\n| M30<\/td>\r\n | 15<\/td>\r\n | 45<\/td>\r\n | 28.007<\/td>\r\n | 27.727<\/td>\r\n | 26.771<\/td>\r\n | 26.211<\/td>\r\n<\/tr>\r\n | \r\n| M33<\/td>\r\n | 15<\/td>\r\n | 45<\/td>\r\n | 31.007<\/td>\r\n | 30.727<\/td>\r\n | 29.771<\/td>\r\n | 29.211<\/td>\r\n<\/tr>\r\n | \r\n| M36<\/td>\r\n | 18<\/td>\r\n | 53<\/td>\r\n | 33.702<\/td>\r\n | 33.402<\/td>\r\n | 32.27<\/td>\r\n | 31.67<\/td>\r\n<\/tr>\r\n | \r\n| M39<\/td>\r\n | 18<\/td>\r\n | 53<\/td>\r\n | 36.702<\/td>\r\n | 36.402<\/td>\r\n | 35.27<\/td>\r\n | 34.67<\/td>\r\n<\/tr>\r\n | \r\n| M42<\/td>\r\n | 21<\/td>\r\n | 63<\/td>\r\n | 39.392<\/td>\r\n | 39.077<\/td>\r\n | 37.799<\/td>\r\n | 37.129<\/td>\r\n<\/tr>\r\n | \r\n| M45<\/td>\r\n | 21<\/td>\r\n | 63<\/td>\r\n | 42.392<\/td>\r\n | 42.077<\/td>\r\n | 40.799<\/td>\r\n | 40.129<\/td>\r\n<\/tr>\r\n | \r\n| M48<\/td>\r\n | 24<\/td>\r\n | 71<\/td>\r\n | 45.087<\/td>\r\n | 44.752<\/td>\r\n | 43.297<\/td>\r\n | 42.587<\/td>\r\n<\/tr>\r\n | \r\n| M52<\/td>\r\n | 24<\/td>\r\n | 71<\/td>\r\n | 49.087<\/td>\r\n | 48.752<\/td>\r\n | 46.681<\/td>\r\n | 45.971<\/td>\r\n<\/tr>\r\n | \r\n| M56<\/td>\r\n | 28<\/td>\r\n | 85<\/td>\r\n | 52.783<\/td>\r\n | 52.428<\/td>\r\n | 50.796<\/td>\r\n | 50.046<\/td>\r\n<\/tr>\r\n | \r\n| M60<\/td>\r\n | 28<\/td>\r\n | 85<\/td>\r\n | 56.783<\/td>\r\n | 56.428<\/td>\r\n | 54.796<\/td>\r\n | 54.046<\/td>\r\n<\/tr>\r\n | \r\n| M64<\/td>\r\n | 32<\/td>\r\n | 95<\/td>\r\n | 60.478<\/td>\r\n | 60.103<\/td>\r\n | 58.305<\/td>\r\n | 57.505<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\nThese dimensions provide guidance for nut manufacturing, ensuring compatibility with bolts under medium load conditions.\r\n\r\n<\/div>\r\n\r\n Coarse Pitch External Threads<\/h2>\r\nMedium precision, medium engagement. Tolerance zones: 6h for d \u2264 1.4 mm; 6g for d > 1.4 mm. Limits for major diameter d and pitch diameter d2<\/sub>, with min root radius per GB\/T 197-2003.\r\n\r\n \r\n\r\n\r\n| Thread<\/th>\r\n | Engagement Length<\/th>\r\n | Major Diameter d<\/th>\r\n | Pitch Diameter d2<\/sub><\/th>\r\nMin Root Radiusa<\/sup><\/th>\r\n<\/tr>\r\n\r\n| ><\/th>\r\n | \u2264<\/th>\r\n | max<\/th>\r\n | min<\/th>\r\n | max<\/th>\r\n | min<\/th>\r\n | min<\/th>\r\n<\/tr>\r\n<\/thead>\r\n | \r\n\r\n| M1<\/td>\r\n | 0.6<\/td>\r\n | 1.7<\/td>\r\n | 1<\/td>\r\n | 0.933<\/td>\r\n | 0.838<\/td>\r\n | 0.785<\/td>\r\n | 0.031<\/td>\r\n<\/tr>\r\n | \r\n| M1.2<\/td>\r\n | 0.6<\/td>\r\n | 1.7<\/td>\r\n | 1.2<\/td>\r\n | 1.133<\/td>\r\n | 1.038<\/td>\r\n | 0.985<\/td>\r\n | 0.031<\/td>\r\n<\/tr>\r\n | \r\n| M1.4<\/td>\r\n | 0.7<\/td>\r\n | 2<\/td>\r\n | 1.4<\/td>\r\n | 1.325<\/td>\r\n | 1.205<\/td>\r\n | 1.149<\/td>\r\n | 0.038<\/td>\r\n<\/tr>\r\n | \r\n| M1.6<\/td>\r\n | 0.8<\/td>\r\n | 2.6<\/td>\r\n | 1.581<\/td>\r\n | 1.496<\/td>\r\n | 1.354<\/td>\r\n | 1.291<\/td>\r\n | 0.044<\/td>\r\n<\/tr>\r\n | \r\n| M1.8<\/td>\r\n | 0.8<\/td>\r\n | 2.6<\/td>\r\n | 1.781<\/td>\r\n | 1.696<\/td>\r\n | 1.554<\/td>\r\n | 1.491<\/td>\r\n | 0.044<\/td>\r\n<\/tr>\r\n | \r\n| M2<\/td>\r\n | 1<\/td>\r\n | 3<\/td>\r\n | 1.981<\/td>\r\n | 1.886<\/td>\r\n | 1.721<\/td>\r\n | 1.654<\/td>\r\n | 0.05<\/td>\r\n<\/tr>\r\n | \r\n| M2.5<\/td>\r\n | 1.3<\/td>\r\n | 3.8<\/td>\r\n | 2.48<\/td>\r\n | 2.38<\/td>\r\n | 2.188<\/td>\r\n | 2.117<\/td>\r\n | 0.056<\/td>\r\n<\/tr>\r\n | \r\n| M3<\/td>\r\n | 1.5<\/td>\r\n | 4.5<\/td>\r\n | 2.98<\/td>\r\n | 2.874<\/td>\r\n | 2.655<\/td>\r\n | 2.58<\/td>\r\n | 0.063<\/td>\r\n<\/tr>\r\n | \r\n| M3.5<\/td>\r\n | 1.7<\/td>\r\n | 5<\/td>\r\n | 3.479<\/td>\r\n | 3.354<\/td>\r\n | 3.089<\/td>\r\n | 3.004<\/td>\r\n | 0.075<\/td>\r\n<\/tr>\r\n | \r\n| M4<\/td>\r\n | 2<\/td>\r\n | 6<\/td>\r\n | 3.978<\/td>\r\n | 3.838<\/td>\r\n | 3.523<\/td>\r\n | 3.433<\/td>\r\n | 0.088<\/td>\r\n<\/tr>\r\n | \r\n| M5<\/td>\r\n | 2.5<\/td>\r\n | 7.5<\/td>\r\n | 4.976<\/td>\r\n | 4.826<\/td>\r\n | 4.456<\/td>\r\n | 4.361<\/td>\r\n | 0.1<\/td>\r\n<\/tr>\r\n | \r\n| M6<\/td>\r\n | 3<\/td>\r\n | 9<\/td>\r\n | 5.974<\/td>\r\n | 5.794<\/td>\r\n | 5.324<\/td>\r\n | 5.212<\/td>\r\n | 0.125<\/td>\r\n<\/tr>\r\n | \r\n| M7<\/td>\r\n | 3<\/td>\r\n | 9<\/td>\r\n | 6.974<\/td>\r\n | 6.794<\/td>\r\n | 6.324<\/td>\r\n | 6.212<\/td>\r\n | 0.125<\/td>\r\n<\/tr>\r\n | \r\n| M8<\/td>\r\n | 4<\/td>\r\n | 12<\/td>\r\n | 7.972<\/td>\r\n | 7.76<\/td>\r\n | 7.16<\/td>\r\n | 7.042<\/td>\r\n | 0.156<\/td>\r\n<\/tr>\r\n | \r\n| M10<\/td>\r\n | 5<\/td>\r\n | 15<\/td>\r\n | 9.968<\/td>\r\n | 9.732<\/td>\r\n | 8.994<\/td>\r\n | 8.862<\/td>\r\n | 0.188<\/td>\r\n<\/tr>\r\n | \r\n| M12<\/td>\r\n | 6<\/td>\r\n | 18<\/td>\r\n | 11.966<\/td>\r\n | 11.701<\/td>\r\n | 10.829<\/td>\r\n | 10.679<\/td>\r\n | 0.219<\/td>\r\n<\/tr>\r\n | \r\n| M14<\/td>\r\n | 8<\/td>\r\n | 24<\/td>\r\n | 13.962<\/td>\r\n | 13.682<\/td>\r\n | 12.663<\/td>\r\n | 12.503<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M16<\/td>\r\n | 8<\/td>\r\n | 24<\/td>\r\n | 15.962<\/td>\r\n | 15.682<\/td>\r\n | 14.663<\/td>\r\n | 14.503<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M18<\/td>\r\n | 10<\/td>\r\n | 30<\/td>\r\n | 17.958<\/td>\r\n | 17.623<\/td>\r\n | 16.334<\/td>\r\n | 16.164<\/td>\r\n | 0.313<\/td>\r\n<\/tr>\r\n | \r\n| M20<\/td>\r\n | 10<\/td>\r\n | 30<\/td>\r\n | 19.958<\/td>\r\n | 19.623<\/td>\r\n | 18.334<\/td>\r\n | 18.164<\/td>\r\n | 0.313<\/td>\r\n<\/tr>\r\n | \r\n| M22<\/td>\r\n | 10<\/td>\r\n | 30<\/td>\r\n | 21.958<\/td>\r\n | 21.623<\/td>\r\n | 20.334<\/td>\r\n | 20.164<\/td>\r\n | 0.313<\/td>\r\n<\/tr>\r\n | \r\n| M24<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 23.952<\/td>\r\n | 23.577<\/td>\r\n | 22.003<\/td>\r\n | 21.803<\/td>\r\n | 0.375<\/td>\r\n<\/tr>\r\n | \r\n| M27<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 26.952<\/td>\r\n | 26.577<\/td>\r\n | 25.003<\/td>\r\n | 24.803<\/td>\r\n | 0.375<\/td>\r\n<\/tr>\r\n | \r\n| M30<\/td>\r\n | 15<\/td>\r\n | 45<\/td>\r\n | 29.947<\/td>\r\n | 29.522<\/td>\r\n | 27.674<\/td>\r\n | 27.462<\/td>\r\n | 0.438<\/td>\r\n<\/tr>\r\n | \r\n| M33<\/td>\r\n | 15<\/td>\r\n | 45<\/td>\r\n | 32.947<\/td>\r\n | 32.522<\/td>\r\n | 30.674<\/td>\r\n | 30.462<\/td>\r\n | 0.438<\/td>\r\n<\/tr>\r\n | \r\n| M36<\/td>\r\n | 18<\/td>\r\n | 53<\/td>\r\n | 35.94<\/td>\r\n | 35.465<\/td>\r\n | 33.342<\/td>\r\n | 33.118<\/td>\r\n | 0.5<\/td>\r\n<\/tr>\r\n | \r\n| M39<\/td>\r\n | 18<\/td>\r\n | 53<\/td>\r\n | 38.94<\/td>\r\n | 38.465<\/td>\r\n | 36.342<\/td>\r\n | 36.118<\/td>\r\n | 0.5<\/td>\r\n<\/tr>\r\n | \r\n| M42<\/td>\r\n | 21<\/td>\r\n | 63<\/td>\r\n | 41.937<\/td>\r\n | 41.437<\/td>\r\n | 39.014<\/td>\r\n | 38.778<\/td>\r\n | 0.563<\/td>\r\n<\/tr>\r\n | \r\n| M45<\/td>\r\n | 21<\/td>\r\n | 63<\/td>\r\n | 44.937<\/td>\r\n | 44.437<\/td>\r\n | 42.014<\/td>\r\n | 41.778<\/td>\r\n | 0.563<\/td>\r\n<\/tr>\r\n | \r\n| M48<\/td>\r\n | 24<\/td>\r\n | 71<\/td>\r\n | 47.929<\/td>\r\n | 47.399<\/td>\r\n | 44.681<\/td>\r\n | 44.431<\/td>\r\n | 0.625<\/td>\r\n<\/tr>\r\n | \r\n| M52<\/td>\r\n | 24<\/td>\r\n | 71<\/td>\r\n | 51.929<\/td>\r\n | 51.399<\/td>\r\n | 48.681<\/td>\r\n | 48.431<\/td>\r\n | 0.625<\/td>\r\n<\/tr>\r\n | \r\n| M56<\/td>\r\n | 28<\/td>\r\n | 85<\/td>\r\n | 55.925<\/td>\r\n | 55.365<\/td>\r\n | 52.353<\/td>\r\n | 52.088<\/td>\r\n | 0.688<\/td>\r\n<\/tr>\r\n | \r\n| M60<\/td>\r\n | 28<\/td>\r\n | 85<\/td>\r\n | 59.925<\/td>\r\n | 59.365<\/td>\r\n | 56.353<\/td>\r\n | 56.088<\/td>\r\n | 0.688<\/td>\r\n<\/tr>\r\n | \r\n| M64<\/td>\r\n | 32<\/td>\r\n | 95<\/td>\r\n | 63.92<\/td>\r\n | 63.32<\/td>\r\n | 60.023<\/td>\r\n | 59.743<\/td>\r\n | 0.75<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\na<\/sup> See GB\/T 197-2003 Chapter 7 and Table 9 for root radius details. These ensure stress distribution and fatigue resistance.\r\n\r\n<\/div>\r\n\r\n Fine Pitch Internal Threads<\/h2>\r\nMedium precision, medium engagement, 6H tolerance zone. Fine pitches offer better vibration resistance and adjustment precision.\r\n\r\n \r\n\r\n\r\n| Thread<\/th>\r\n | Engagement Length<\/th>\r\n | Pitch Diameter D2<\/sub><\/th>\r\nMinor Diameter D1<\/sub><\/th>\r\n<\/tr>\r\n\r\n| ><\/th>\r\n | \u2264<\/th>\r\n | max<\/th>\r\n | min<\/th>\r\n | max<\/th>\r\n | min<\/th>\r\n<\/tr>\r\n<\/thead>\r\n | \r\n\r\n| M8\u00d71<\/td>\r\n | 3<\/td>\r\n | 9<\/td>\r\n | 7.5<\/td>\r\n | 7.35<\/td>\r\n | 7.153<\/td>\r\n | 6.917<\/td>\r\n<\/tr>\r\n | \r\n| M10\u00d71<\/td>\r\n | 4<\/td>\r\n | 12<\/td>\r\n | 9.5<\/td>\r\n | 9.35<\/td>\r\n | 9.153<\/td>\r\n | 8.917<\/td>\r\n<\/tr>\r\n | \r\n| M10\u00d71.25<\/td>\r\n | 4<\/td>\r\n | 12<\/td>\r\n | 9.348<\/td>\r\n | 9.188<\/td>\r\n | 8.912<\/td>\r\n | 8.647<\/td>\r\n<\/tr>\r\n | \r\n| M12\u00d71.25<\/td>\r\n | 4.5<\/td>\r\n | 13<\/td>\r\n | 11.368<\/td>\r\n | 11.188<\/td>\r\n | 10.912<\/td>\r\n | 10.647<\/td>\r\n<\/tr>\r\n | \r\n| M12\u00d71.5<\/td>\r\n | 4.5<\/td>\r\n | 13<\/td>\r\n | 11.216<\/td>\r\n | 11.026<\/td>\r\n | 10.676<\/td>\r\n | 10.376<\/td>\r\n<\/tr>\r\n | \r\n| M14\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 13.216<\/td>\r\n | 13.026<\/td>\r\n | 12.676<\/td>\r\n | 12.376<\/td>\r\n<\/tr>\r\n | \r\n| M16\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 15.216<\/td>\r\n | 15.026<\/td>\r\n | 14.676<\/td>\r\n | 14.376<\/td>\r\n<\/tr>\r\n | \r\n| M18\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 17.216<\/td>\r\n | 17.026<\/td>\r\n | 16.676<\/td>\r\n | 16.376<\/td>\r\n<\/tr>\r\n | \r\n| M18\u00d72<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 16.913<\/td>\r\n | 16.701<\/td>\r\n | 16.21<\/td>\r\n | 15.835<\/td>\r\n<\/tr>\r\n | \r\n| M20\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 19.216<\/td>\r\n | 19.026<\/td>\r\n | 18.676<\/td>\r\n | 18.376<\/td>\r\n<\/tr>\r\n | \r\n| M20\u00d72<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 18.913<\/td>\r\n | 18.701<\/td>\r\n | 18.21<\/td>\r\n | 17.835<\/td>\r\n<\/tr>\r\n | \r\n| M22\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 21.216<\/td>\r\n | 21.026<\/td>\r\n | 20.676<\/td>\r\n | 20.376<\/td>\r\n<\/tr>\r\n | \r\n| M22\u00d72<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 20.913<\/td>\r\n | 20.701<\/td>\r\n | 20.21<\/td>\r\n | 19.835<\/td>\r\n<\/tr>\r\n | \r\n| M24\u00d72<\/td>\r\n | 8.5<\/td>\r\n | 25<\/td>\r\n | 22.925<\/td>\r\n | 22.701<\/td>\r\n | 22.21<\/td>\r\n | 21.835<\/td>\r\n<\/tr>\r\n | \r\n| M27\u00d72<\/td>\r\n | 8.5<\/td>\r\n | 25<\/td>\r\n | 25.925<\/td>\r\n | 25.701<\/td>\r\n | 25.21<\/td>\r\n | 24.835<\/td>\r\n<\/tr>\r\n | \r\n| M30\u00d72<\/td>\r\n | 8.5<\/td>\r\n | 25<\/td>\r\n | 28.925<\/td>\r\n | 28.701<\/td>\r\n | 28.21<\/td>\r\n | 27.835<\/td>\r\n<\/tr>\r\n | \r\n| M33\u00d72<\/td>\r\n | 8.5<\/td>\r\n | 25<\/td>\r\n | 31.925<\/td>\r\n | 31.701<\/td>\r\n | 31.21<\/td>\r\n | 30.835<\/td>\r\n<\/tr>\r\n | \r\n| M36\u00d73<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 34.316<\/td>\r\n | 34.051<\/td>\r\n | 33.252<\/td>\r\n | 32.752<\/td>\r\n<\/tr>\r\n | \r\n| M39\u00d73<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 37.316<\/td>\r\n | 37.051<\/td>\r\n | 36.252<\/td>\r\n | 35.752<\/td>\r\n<\/tr>\r\n | \r\n| M42\u00d73<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 40.316<\/td>\r\n | 40.051<\/td>\r\n | 39.252<\/td>\r\n | 38.752<\/td>\r\n<\/tr>\r\n | \r\n| M45\u00d73<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 43.316<\/td>\r\n | 43.051<\/td>\r\n | 42.252<\/td>\r\n | 41.752<\/td>\r\n<\/tr>\r\n | \r\n| M48\u00d73<\/td>\r\n | 15<\/td>\r\n | 45<\/td>\r\n | 46.331<\/td>\r\n | 46.051<\/td>\r\n | 45.252<\/td>\r\n | 44.752<\/td>\r\n<\/tr>\r\n | \r\n| M52\u00d74<\/td>\r\n | 19<\/td>\r\n | 56<\/td>\r\n | 49.717<\/td>\r\n | 49.402<\/td>\r\n | 48.27<\/td>\r\n | 47.67<\/td>\r\n<\/tr>\r\n | \r\n| M56\u00d74<\/td>\r\n | 19<\/td>\r\n | 56<\/td>\r\n | 53.717<\/td>\r\n | 53.402<\/td>\r\n | 52.27<\/td>\r\n | 51.67<\/td>\r\n<\/tr>\r\n | \r\n| M60\u00d74<\/td>\r\n | 19<\/td>\r\n | 56<\/td>\r\n | 57.717<\/td>\r\n | 57.402<\/td>\r\n | 56.27<\/td>\r\n | 55.67<\/td>\r\n<\/tr>\r\n | \r\n| M64\u00d74<\/td>\r\n | 19<\/td>\r\n | 56<\/td>\r\n | 61.717<\/td>\r\n | 61.402<\/td>\r\n | 60.27<\/td>\r\n | 59.67<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\nThese values support finer load distribution in high-vibration environments.\r\n\r\n<\/div>\r\n\r\n Fine Pitch External Threads<\/h2>\r\nMedium precision, medium engagement, 6g tolerance zone. Provides stronger core sections for enhanced shear strength.\r\n\r\n \r\n\r\n\r\n| Thread<\/th>\r\n | Engagement Length<\/th>\r\n | Major Diameter d<\/th>\r\n | Pitch Diameter d2<\/sub><\/th>\r\nMin Root Radiusa<\/sup><\/th>\r\n<\/tr>\r\n\r\n| ><\/th>\r\n | \u2264<\/th>\r\n | max<\/th>\r\n | min<\/th>\r\n | max<\/th>\r\n | min<\/th>\r\n | min<\/th>\r\n<\/tr>\r\n<\/thead>\r\n | \r\n\r\n| M8\u00d71<\/td>\r\n | 3<\/td>\r\n | 9<\/td>\r\n | 7.974<\/td>\r\n | 7.794<\/td>\r\n | 7.324<\/td>\r\n | 7.212<\/td>\r\n | 0.125<\/td>\r\n<\/tr>\r\n | \r\n| M10\u00d71<\/td>\r\n | 4<\/td>\r\n | 12<\/td>\r\n | 9.974<\/td>\r\n | 9.794<\/td>\r\n | 9.324<\/td>\r\n | 9.212<\/td>\r\n | 0.125<\/td>\r\n<\/tr>\r\n | \r\n| M10\u00d71.25<\/td>\r\n | 4<\/td>\r\n | 12<\/td>\r\n | 9.972<\/td>\r\n | 9.76<\/td>\r\n | 9.16<\/td>\r\n | 9.042<\/td>\r\n | 0.156<\/td>\r\n<\/tr>\r\n | \r\n| M12\u00d71.25<\/td>\r\n | 4.5<\/td>\r\n | 13<\/td>\r\n | 11.972<\/td>\r\n | 11.76<\/td>\r\n | 11.16<\/td>\r\n | 11.028<\/td>\r\n | 0.156<\/td>\r\n<\/tr>\r\n | \r\n| M12\u00d71.5<\/td>\r\n | 4.5<\/td>\r\n | 13<\/td>\r\n | 11.968<\/td>\r\n | 11.732<\/td>\r\n | 10.994<\/td>\r\n | 10.854<\/td>\r\n | 0.188<\/td>\r\n<\/tr>\r\n | \r\n| M14\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 13.968<\/td>\r\n | 13.732<\/td>\r\n | 12.994<\/td>\r\n | 12.854<\/td>\r\n | 0.188<\/td>\r\n<\/tr>\r\n | \r\n| M16\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 15.968<\/td>\r\n | 15.732<\/td>\r\n | 14.994<\/td>\r\n | 14.854<\/td>\r\n | 0.188<\/td>\r\n<\/tr>\r\n | \r\n| M18\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 17.968<\/td>\r\n | 17.732<\/td>\r\n | 16.994<\/td>\r\n | 16.854<\/td>\r\n | 0.188<\/td>\r\n<\/tr>\r\n | \r\n| M18\u00d72<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 17.962<\/td>\r\n | 17.682<\/td>\r\n | 16.663<\/td>\r\n | 16.503<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M20\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 19.968<\/td>\r\n | 19.732<\/td>\r\n | 18.994<\/td>\r\n | 18.854<\/td>\r\n | 0.188<\/td>\r\n<\/tr>\r\n | \r\n| M20\u00d72<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 19.962<\/td>\r\n | 19.682<\/td>\r\n | 18.663<\/td>\r\n | 18.503<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M22\u00d71.5<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 21.968<\/td>\r\n | 21.732<\/td>\r\n | 20.994<\/td>\r\n | 20.854<\/td>\r\n | 0.188<\/td>\r\n<\/tr>\r\n | \r\n| M22\u00d72<\/td>\r\n | 5.6<\/td>\r\n | 16<\/td>\r\n | 21.962<\/td>\r\n | 21.682<\/td>\r\n | 20.663<\/td>\r\n | 20.503<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M24\u00d72<\/td>\r\n | 8.5<\/td>\r\n | 25<\/td>\r\n | 23.962<\/td>\r\n | 23.682<\/td>\r\n | 22.663<\/td>\r\n | 22.493<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M27\u00d72<\/td>\r\n | 8.5<\/td>\r\n | 25<\/td>\r\n | 26.962<\/td>\r\n | 26.682<\/td>\r\n | 25.663<\/td>\r\n | 25.493<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M30\u00d72<\/td>\r\n | 8.5<\/td>\r\n | 25<\/td>\r\n | 29.962<\/td>\r\n | 29.682<\/td>\r\n | 28.663<\/td>\r\n | 28.493<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M33\u00d72<\/td>\r\n | 8.5<\/td>\r\n | 25<\/td>\r\n | 32.962<\/td>\r\n | 32.682<\/td>\r\n | 31.663<\/td>\r\n | 31.493<\/td>\r\n | 0.25<\/td>\r\n<\/tr>\r\n | \r\n| M36\u00d73<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 35.952<\/td>\r\n | 35.577<\/td>\r\n | 34.003<\/td>\r\n | 33.803<\/td>\r\n | 0.375<\/td>\r\n<\/tr>\r\n | \r\n| M39\u00d73<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 38.952<\/td>\r\n | 38.577<\/td>\r\n | 37.003<\/td>\r\n | 36.803<\/td>\r\n | 0.375<\/td>\r\n<\/tr>\r\n | \r\n| M42\u00d73<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 41.952<\/td>\r\n | 41.577<\/td>\r\n | 40.003<\/td>\r\n | 39.803<\/td>\r\n | 0.375<\/td>\r\n<\/tr>\r\n | \r\n| M45\u00d73<\/td>\r\n | 12<\/td>\r\n | 36<\/td>\r\n | 44.952<\/td>\r\n | 44.577<\/td>\r\n | 43.003<\/td>\r\n | 42.803<\/td>\r\n | 0.375<\/td>\r\n<\/tr>\r\n | \r\n| M48\u00d73<\/td>\r\n | 15<\/td>\r\n | 45<\/td>\r\n | 47.952<\/td>\r\n | 47.577<\/td>\r\n | 46.003<\/td>\r\n | 45.791<\/td>\r\n | 0.375<\/td>\r\n<\/tr>\r\n | \r\n| M52\u00d74<\/td>\r\n | 19<\/td>\r\n | 56<\/td>\r\n | 51.94<\/td>\r\n | 51.465<\/td>\r\n | 49.342<\/td>\r\n | 49.106<\/td>\r\n | 0.5<\/td>\r\n<\/tr>\r\n | \r\n| M56\u00d74<\/td>\r\n | 19<\/td>\r\n | 56<\/td>\r\n | 55.94<\/td>\r\n | 55.465<\/td>\r\n | 53.342<\/td>\r\n | 53.106<\/td>\r\n | 0.5<\/td>\r\n<\/tr>\r\n | \r\n| M60\u00d74<\/td>\r\n | 19<\/td>\r\n | 56<\/td>\r\n | 59.94<\/td>\r\n | 59.465<\/td>\r\n | 57.342<\/td>\r\n | 57.106<\/td>\r\n | 0.5<\/td>\r\n<\/tr>\r\n | \r\n| M64\u00d74<\/td>\r\n | 19<\/td>\r\n | 56<\/td>\r\n | 63.94<\/td>\r\n | 63.465<\/td>\r\n | 61.342<\/td>\r\n | 61.106<\/td>\r\n | 0.5<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\na<\/sup> See GB\/T 197-2003 for root radius specifications, critical for avoiding stress concentrations.\r\n\r\n<\/div>\r\n \r\n FAQ<\/h2>\r\nWhat tolerance zones apply to coarse internal threads?<\/h3>\r\n5H for diameters \u22641.4 mm; 6H for >1.4 mm, ensuring medium precision fit.\r\nHow does plating affect thread dimensions?<\/h3>\r\nTolerances are pre-plating; post-plating profiles must not exceed H\/h positions for thin coatings to maintain assembly.\r\nWhy use fine pitch threads?<\/h3>\r\nThey provide better vibration resistance and finer adjustments, with stronger cores per limits in tables 3 and 4.\r\nWhat is medium engagement length?<\/h3>\r\nIt balances thread strength and cost; use table values for specific ranges to avoid over- or under-engagement.\r\nHow to interpret root radius?<\/h3>\r\nMin values per GB\/T 197-2003 reduce stress; essential for fatigue-prone applications.\r\nAre these limits for all materials?<\/h3>\r\nYes, but adjust for special platings; consult standard for heavy coatings requiring oversized threads.\r\n\r\n<\/div>\r\n ","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5757","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts\/5757","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/comments?post=5757"}],"version-history":[{"count":3,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts\/5757\/revisions"}],"predecessor-version":[{"id":5760,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts\/5757\/revisions\/5760"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/media?parent=5757"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/categories?post=5757"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/tags?post=5757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} | | | | | | | | | | | | | | | | | | |