{"id":5727,"date":"2025-12-24T03:02:31","date_gmt":"2025-12-24T03:02:31","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5727"},"modified":"2025-12-24T03:02:31","modified_gmt":"2025-12-24T03:02:31","slug":"bolt-screw-stud-length-standards-guide","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/fr\/blog\/bolt-screw-stud-length-standards-guide\/","title":{"rendered":"Guide des normes de longueur des boulons, vis et goujons"},"content":{"rendered":"
\n

Plan de l'article<\/h2>\n

Ce guide d\u00e9taille les normes relatives aux longueurs nominales et aux longueurs de filetage des boulons, vis et goujons, conform\u00e9ment \u00e0 la norme ISO 888:2012 et aux tol\u00e9rances associ\u00e9es de la norme ISO 4759-1. Sa structure est la suivante\u00a0:<\/p>\n

    \n
  1. Introduction aux normes de longueur<\/li>\n
  2. Normes de longueur nominale<\/li>\n
  3. Normes de longueur de filetage<\/li>\n
  4. Points cl\u00e9s et calculs<\/li>\n
  5. Foire aux questions (FAQ)<\/li>\n<\/ol>\n<\/div>\n
    \n

    Introduction aux normes de longueur<\/h2>\n

    Les normes relatives aux longueurs nominales et aux longueurs de filetage des boulons, vis et goujons garantissent l'interchangeabilit\u00e9, la coh\u00e9rence de conception, une gestion efficace des mat\u00e9riaux, une productivit\u00e9 accrue et la conformit\u00e9 aux r\u00e9glementations industrielles. Ces normes, align\u00e9es sur les normes ISO 888:2012 pour les longueurs et ISO 4759-1 pour les tol\u00e9rances, facilitent une fabrication et une application uniformes dans des secteurs tels que l'automobile, la construction et la m\u00e9canique.<\/p>\n

    L'adoption de longueurs standardis\u00e9es minimise les probl\u00e8mes d'installation, simplifie la gestion des stocks et r\u00e9duit les co\u00fbts. Les classes de produits A, B et C d\u00e9finissent les niveaux de tol\u00e9rance\u00a0: la classe A offre la tol\u00e9rance la plus stricte pour les applications de pr\u00e9cision, la classe B convient \u00e0 un usage g\u00e9n\u00e9ral et la classe C aux applications moins critiques.<\/p>\n

      \n
    • Interchangeabilit\u00e9 : Permet un remplacement ais\u00e9 par des pi\u00e8ces de diff\u00e9rents fabricants.<\/li>\n
    • Coh\u00e9rence de la conception : Favorise des pratiques d'ing\u00e9nierie uniformes.<\/li>\n
    • Gestion des mat\u00e9riaux : Rationalise le contr\u00f4le des stocks et l'approvisionnement.<\/li>\n
    • Efficacit\u00e9 de la production : Optimise les processus de fabrication.<\/li>\n
    • Conformit\u00e9 r\u00e9glementaire : Respecte les normes nationales et internationales.<\/li>\n<\/ul>\n

      Ces directives fournissent des indications pratiques pour le choix des longueurs appropri\u00e9es, garantissant l'int\u00e9grit\u00e9 structurelle et les performances des assemblages fix\u00e9s.<\/p>\n<\/div>\n

      \n

      Normes de longueur nominale<\/h2>\n

      Les longueurs nominales des boulons, vis et goujons sont conformes \u00e0 la norme ISO 888:2012, avec des tol\u00e9rances selon la norme ISO 4759-1. Le tableau ci-dessous indique les longueurs nominales pr\u00e9f\u00e9r\u00e9es (l) en mm, ainsi que les valeurs minimales et maximales pour les classes A, B et C. \u00c9vitez autant que possible les longueurs entre parenth\u00e8ses, car il s'agit de pr\u00e9f\u00e9rences secondaires.<\/p>\n

      Les tol\u00e9rances de classe A sont plus strictes (JS15 pour l \u2264 150 mm, JS17 pour l > 150 mm), ce qui convient aux applications de haute pr\u00e9cision. La classe B utilise syst\u00e9matiquement JS17, offrant un bon compromis entre co\u00fbt et pr\u00e9cision. La classe C applique JS17 pour l \u2264 150 mm et \u00b1IT17 pour les dimensions sup\u00e9rieures, pour des applications \u00e9conomiques.<\/p>\n

      \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      Longueur nominale l (mm)<\/th>\nGrade A (mm)<\/th>\nGrade B (mm)<\/th>\nGrade C (mm)<\/th>\n<\/tr>\n
      <\/th>\nMin<\/th>\nMax<\/th>\nMin<\/th>\nMax<\/th>\nMin<\/th>\nMax<\/th>\n<\/tr>\n<\/thead>\n
      2<\/td>\n1.80<\/td>\n2.20<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      (2.5)<\/td>\n2.30<\/td>\n2.70<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      3<\/td>\n2.80<\/td>\n3.20<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      4<\/td>\n3.76<\/td>\n4.24<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      5<\/td>\n4.76<\/td>\n5.24<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      6<\/td>\n5.76<\/td>\n6.24<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      (7)<\/td>\n6.71<\/td>\n7.29<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      8<\/td>\n7.71<\/td>\n8.29<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      (9)<\/td>\n8.71<\/td>\n9.29<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      10<\/td>\n9.71<\/td>\n10.29<\/td>\n9.25<\/td>\n10.75<\/td>\n9.25<\/td>\n10.75<\/td>\n<\/tr>\n
      (11)<\/td>\n10.65<\/td>\n11.35<\/td>\n10.10<\/td>\n11.90<\/td>\n10.10<\/td>\n11.90<\/td>\n<\/tr>\n
      12<\/td>\n11.65<\/td>\n12.35<\/td>\n11.10<\/td>\n12.90<\/td>\n11.10<\/td>\n12.90<\/td>\n<\/tr>\n
      (14)<\/td>\n13.65<\/td>\n14.35<\/td>\n13.10<\/td>\n14.90<\/td>\n13.10<\/td>\n14.90<\/td>\n<\/tr>\n
      16<\/td>\n15.65<\/td>\n16.35<\/td>\n15.10<\/td>\n16.90<\/td>\n15.10<\/td>\n16.90<\/td>\n<\/tr>\n
      (18)<\/td>\n17.65<\/td>\n18.35<\/td>\n17.10<\/td>\n18.90<\/td>\n17.10<\/td>\n18.90<\/td>\n<\/tr>\n
      20<\/td>\n19.58<\/td>\n20.42<\/td>\n18.95<\/td>\n21.05<\/td>\n18.95<\/td>\n21.05<\/td>\n<\/tr>\n
      (22)<\/td>\n21.58<\/td>\n22.42<\/td>\n20.95<\/td>\n23.05<\/td>\n20.95<\/td>\n23.05<\/td>\n<\/tr>\n
      25<\/td>\n24.58<\/td>\n25.42<\/td>\n23.95<\/td>\n26.05<\/td>\n23.95<\/td>\n26.05<\/td>\n<\/tr>\n
      (28)<\/td>\n27.58<\/td>\n28.42<\/td>\n26.95<\/td>\n29.05<\/td>\n26.95<\/td>\n29.05<\/td>\n<\/tr>\n
      30<\/td>\n29.58<\/td>\n30.42<\/td>\n28.95<\/td>\n31.05<\/td>\n28.95<\/td>\n31.05<\/td>\n<\/tr>\n
      (32)<\/td>\n31.50<\/td>\n32.50<\/td>\n30.75<\/td>\n33.25<\/td>\n30.75<\/td>\n33.25<\/td>\n<\/tr>\n
      35<\/td>\n34.50<\/td>\n35.50<\/td>\n33.75<\/td>\n36.25<\/td>\n33.75<\/td>\n36.25<\/td>\n<\/tr>\n
      (38)<\/td>\n37.50<\/td>\n38.50<\/td>\n36.75<\/td>\n39.25<\/td>\n36.75<\/td>\n39.25<\/td>\n<\/tr>\n
      40<\/td>\n39.50<\/td>\n40.50<\/td>\n38.75<\/td>\n41.25<\/td>\n38.75<\/td>\n41.25<\/td>\n<\/tr>\n
      45<\/td>\n44.50<\/td>\n45.50<\/td>\n43.75<\/td>\n46.25<\/td>\n43.75<\/td>\n46.25<\/td>\n<\/tr>\n
      50<\/td>\n49.50<\/td>\n50.50<\/td>\n48.75<\/td>\n51.25<\/td>\n48.75<\/td>\n51.25<\/td>\n<\/tr>\n
      55<\/td>\n54.40<\/td>\n55.60<\/td>\n53.50<\/td>\n56.50<\/td>\n53.50<\/td>\n56.50<\/td>\n<\/tr>\n
      60<\/td>\n59.40<\/td>\n60.60<\/td>\n58.50<\/td>\n61.50<\/td>\n58.50<\/td>\n61.50<\/td>\n<\/tr>\n
      65<\/td>\n64.40<\/td>\n65.60<\/td>\n63.50<\/td>\n66.50<\/td>\n63.50<\/td>\n66.50<\/td>\n<\/tr>\n
      70<\/td>\n69.40<\/td>\n70.60<\/td>\n68.50<\/td>\n71.50<\/td>\n68.50<\/td>\n71.50<\/td>\n<\/tr>\n
      (75)<\/td>\n74.40<\/td>\n75.60<\/td>\n73.50<\/td>\n76.50<\/td>\n73.50<\/td>\n76.50<\/td>\n<\/tr>\n
      80<\/td>\n79.40<\/td>\n80.60<\/td>\n78.50<\/td>\n81.50<\/td>\n78.50<\/td>\n81.50<\/td>\n<\/tr>\n
      (85)<\/td>\n84.30<\/td>\n85.70<\/td>\n83.25<\/td>\n86.75<\/td>\n83.25<\/td>\n86.75<\/td>\n<\/tr>\n
      90<\/td>\n89.30<\/td>\n90.70<\/td>\n88.25<\/td>\n91.75<\/td>\n88.25<\/td>\n91.75<\/td>\n<\/tr>\n
      (95)<\/td>\n94.30<\/td>\n95.70<\/td>\n93.25<\/td>\n96.75<\/td>\n93.25<\/td>\n96.75<\/td>\n<\/tr>\n
      100<\/td>\n99.30<\/td>\n100.70<\/td>\n98.25<\/td>\n101.75<\/td>\n98.25<\/td>\n101.75<\/td>\n<\/tr>\n
      (105)<\/td>\n104.30<\/td>\n105.70<\/td>\n103.25<\/td>\n106.75<\/td>\n103.25<\/td>\n106.75<\/td>\n<\/tr>\n
      110<\/td>\n109.30<\/td>\n110.70<\/td>\n108.25<\/td>\n111.75<\/td>\n108.25<\/td>\n111.75<\/td>\n<\/tr>\n
      (115)<\/td>\n114.30<\/td>\n115.70<\/td>\n113.25<\/td>\n116.75<\/td>\n113.25<\/td>\n116.75<\/td>\n<\/tr>\n
      120<\/td>\n119.30<\/td>\n120.70<\/td>\n118.25<\/td>\n121.75<\/td>\n118.25<\/td>\n121.75<\/td>\n<\/tr>\n
      (125)<\/td>\n124.20<\/td>\n125.80<\/td>\n123.00<\/td>\n127.00<\/td>\n123.00<\/td>\n127.00<\/td>\n<\/tr>\n
      130<\/td>\n129.20<\/td>\n130.80<\/td>\n128.00<\/td>\n132.00<\/td>\n128.00<\/td>\n132.00<\/td>\n<\/tr>\n
      140<\/td>\n139.20<\/td>\n140.80<\/td>\n138.00<\/td>\n142.00<\/td>\n138.00<\/td>\n142.00<\/td>\n<\/tr>\n
      150<\/td>\n149.20<\/td>\n150.80<\/td>\n148.00<\/td>\n152.00<\/td>\n148.00<\/td>\n152.00<\/td>\n<\/tr>\n
      160<\/td>\n159.20<\/td>\n160.80<\/td>\n158.00<\/td>\n162.00<\/td>\n158.00<\/td>\n162.00<\/td>\n<\/tr>\n
      (170)<\/td>\n169.20<\/td>\n170.80<\/td>\n168.00<\/td>\n172.00<\/td>\n166.00<\/td>\n174.00<\/td>\n<\/tr>\n
      180<\/td>\n179.20<\/td>\n180.80<\/td>\n178.00<\/td>\n182.00<\/td>\n176.00<\/td>\n184.00<\/td>\n<\/tr>\n
      (190)<\/td>\n189.10<\/td>\n190.90<\/td>\n187.70<\/td>\n192.30<\/td>\n185.40<\/td>\n194.60<\/td>\n<\/tr>\n
      200<\/td>\n199.10<\/td>\n200.90<\/td>\n197.70<\/td>\n202.30<\/td>\n195.40<\/td>\n204.60<\/td>\n<\/tr>\n
      220<\/td>\n219.10<\/td>\n220.90<\/td>\n217.70<\/td>\n222.30<\/td>\n215.40<\/td>\n224.60<\/td>\n<\/tr>\n
      240<\/td>\n239.10<\/td>\n240.90<\/td>\n237.70<\/td>\n242.30<\/td>\n235.40<\/td>\n244.60<\/td>\n<\/tr>\n
      260<\/td>\n–<\/td>\n–<\/td>\n257.40<\/td>\n262.60<\/td>\n254.80<\/td>\n265.20<\/td>\n<\/tr>\n
      280<\/td>\n–<\/td>\n–<\/td>\n277.40<\/td>\n282.60<\/td>\n274.80<\/td>\n285.20<\/td>\n<\/tr>\n
      300<\/td>\n–<\/td>\n–<\/td>\n297.40<\/td>\n302.60<\/td>\n294.80<\/td>\n305.20<\/td>\n<\/tr>\n
      320<\/td>\n–<\/td>\n–<\/td>\n317.15<\/td>\n322.85<\/td>\n314.30<\/td>\n325.70<\/td>\n<\/tr>\n
      340<\/td>\n–<\/td>\n–<\/td>\n337.15<\/td>\n342.85<\/td>\n334.30<\/td>\n345.70<\/td>\n<\/tr>\n
      360<\/td>\n–<\/td>\n–<\/td>\n357.15<\/td>\n362.85<\/td>\n354.30<\/td>\n365.70<\/td>\n<\/tr>\n
      380<\/td>\n–<\/td>\n–<\/td>\n377.15<\/td>\n382.85<\/td>\n374.30<\/td>\n385.70<\/td>\n<\/tr>\n
      400<\/td>\n–<\/td>\n–<\/td>\n397.15<\/td>\n402.85<\/td>\n394.30<\/td>\n405.70<\/td>\n<\/tr>\n
      420<\/td>\n–<\/td>\n–<\/td>\n416.85<\/td>\n423.15<\/td>\n413.70<\/td>\n426.30<\/td>\n<\/tr>\n
      440<\/td>\n–<\/td>\n–<\/td>\n436.85<\/td>\n443.15<\/td>\n433.70<\/td>\n446.30<\/td>\n<\/tr>\n
      460<\/td>\n–<\/td>\n–<\/td>\n456.85<\/td>\n463.15<\/td>\n453.70<\/td>\n466.30<\/td>\n<\/tr>\n
      480<\/td>\n–<\/td>\n–<\/td>\n476.85<\/td>\n483.15<\/td>\n473.70<\/td>\n486.30<\/td>\n<\/tr>\n
      500<\/td>\n–<\/td>\n–<\/td>\n496.85<\/td>\n503.15<\/td>\n493.70<\/td>\n506.30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      S\u00e9lectionnez les longueurs en fonction des exigences de l'application, en privil\u00e9giant les valeurs non entre parenth\u00e8ses pour une standardisation optimale.<\/p>\n<\/div>\n

      \n

      Normes de longueur de filetage<\/h2>\n

      La longueur du filetage (b) des boulons, vis et goujons est sp\u00e9cifi\u00e9e dans les normes ISO 888:2012 et GB\/T 3106-2016, correspondant \u00e0 la partie filet\u00e9e des fixations \u00e0 filetage partiel. Le tableau ci-dessous pr\u00e9sente les valeurs des diam\u00e8tres nominaux (d) de 1,6 mm \u00e0 160 mm, class\u00e9s par plage de longueur totale (l).<\/p>\n

      Ces normes garantissent un engagement suffisant du filetage pour une fixation s\u00fbre tout en minimisant la consommation de mati\u00e8re. Pour les calculs, utilisez les formules lorsque les valeurs du tableau ne sont pas indiqu\u00e9es et envisagez un filetage complet si la longueur de la tige non filet\u00e9e est \u2264 0,5d.<\/p>\n

      \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      Diam\u00e8tre nominal d (mm)<\/th>\nl \u2264 125 (mm)<\/th>\n125 < l \u2264 200 (mm)<\/th>\nl > 200 (mm)<\/th>\n<\/tr>\n<\/thead>\n
      1.6<\/td>\n9<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      2<\/td>\n10<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      2.5<\/td>\n11<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      3<\/td>\n12<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      4<\/td>\n14<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      5<\/td>\n16<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      6<\/td>\n18<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
      8<\/td>\n22<\/td>\n28<\/td>\n–<\/td>\n<\/tr>\n
      10<\/td>\n26<\/td>\n32<\/td>\n–<\/td>\n<\/tr>\n
      12<\/td>\n30<\/td>\n36<\/td>\n–<\/td>\n<\/tr>\n
      (14)<\/td>\n34<\/td>\n40<\/td>\n–<\/td>\n<\/tr>\n
      16<\/td>\n38<\/td>\n44<\/td>\n57<\/td>\n<\/tr>\n
      18<\/td>\n42<\/td>\n48<\/td>\n61<\/td>\n<\/tr>\n
      20<\/td>\n46<\/td>\n52<\/td>\n65<\/td>\n<\/tr>\n
      22<\/td>\n50<\/td>\n56<\/td>\n69<\/td>\n<\/tr>\n
      24<\/td>\n54<\/td>\n60<\/td>\n73<\/td>\n<\/tr>\n
      27<\/td>\n60<\/td>\n66<\/td>\n79<\/td>\n<\/tr>\n
      30<\/td>\n66<\/td>\n72<\/td>\n85<\/td>\n<\/tr>\n
      33<\/td>\n72<\/td>\n78<\/td>\n91<\/td>\n<\/tr>\n
      36<\/td>\n78<\/td>\n84<\/td>\n97<\/td>\n<\/tr>\n
      39<\/td>\n84<\/td>\n90<\/td>\n103<\/td>\n<\/tr>\n
      42<\/td>\n90<\/td>\n96<\/td>\n109<\/td>\n<\/tr>\n
      45<\/td>\n96<\/td>\n102<\/td>\n115<\/td>\n<\/tr>\n
      48<\/td>\n102<\/td>\n108<\/td>\n121<\/td>\n<\/tr>\n
      52<\/td>\n–<\/td>\n116<\/td>\n129<\/td>\n<\/tr>\n
      56<\/td>\n–<\/td>\n124<\/td>\n137<\/td>\n<\/tr>\n
      60<\/td>\n–<\/td>\n132<\/td>\n145<\/td>\n<\/tr>\n
      64<\/td>\n–<\/td>\n140<\/td>\n153<\/td>\n<\/tr>\n
      68<\/td>\n–<\/td>\n148<\/td>\n161<\/td>\n<\/tr>\n
      72<\/td>\n–<\/td>\n156<\/td>\n169<\/td>\n<\/tr>\n
      76<\/td>\n–<\/td>\n164<\/td>\n177<\/td>\n<\/tr>\n
      80<\/td>\n–<\/td>\n172<\/td>\n185<\/td>\n<\/tr>\n
      85<\/td>\n–<\/td>\n182<\/td>\n195<\/td>\n<\/tr>\n
      90<\/td>\n–<\/td>\n192<\/td>\n205<\/td>\n<\/tr>\n
      95<\/td>\n–<\/td>\n–<\/td>\n215<\/td>\n<\/tr>\n
      100<\/td>\n–<\/td>\n–<\/td>\n225<\/td>\n<\/tr>\n
      105<\/td>\n–<\/td>\n–<\/td>\n235<\/td>\n<\/tr>\n
      110<\/td>\n–<\/td>\n–<\/td>\n245<\/td>\n<\/tr>\n
      115<\/td>\n–<\/td>\n–<\/td>\n255<\/td>\n<\/tr>\n
      120<\/td>\n–<\/td>\n–<\/td>\n265<\/td>\n<\/tr>\n
      125<\/td>\n–<\/td>\n–<\/td>\n275<\/td>\n<\/tr>\n
      130<\/td>\n–<\/td>\n–<\/td>\n285<\/td>\n<\/tr>\n
      140<\/td>\n–<\/td>\n–<\/td>\n305<\/td>\n<\/tr>\n
      150<\/td>\n–<\/td>\n–<\/td>\n325<\/td>\n<\/tr>\n
      160<\/td>\n–<\/td>\n–<\/td>\n345<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      Utilisez ces valeurs pour d\u00e9terminer l'engagement du filetage, garantissant ainsi s\u00e9curit\u00e9 et efficacit\u00e9 de la conception.<\/p>\n<\/div>\n

      \n

      Points cl\u00e9s et calculs<\/h2>\n

      Les consid\u00e9rations essentielles pour l'application de ces normes comprennent\u00a0:<\/p>\n

        \n
      • Calculer la longueur du filetage b sauf indication contraire : Pour l \u2264 125 mm, b = 2d + 6 mm ; pour 125 mm 200 mm, b = 2d + 25 mm.<\/li>\n
      • Si la tige non filet\u00e9e \u2264 0,5d, fabriquer enti\u00e8rement filet\u00e9e.<\/li>\n
      • Tol\u00e9rances pour la longueur de filetage b selon ISO 4759-1 : Pour les vis et les goujons fendus ou encastr\u00e9s, +2P \/ 0 (o\u00f9 P est le pas).<\/li>\n
      • \u00c9vitez d'indiquer les longueurs nominales entre parenth\u00e8ses pour une meilleure standardisation.<\/li>\n
      • Ces dispositions s'appliquent aux filetages m\u00e9triques ISO selon la norme ISO 68-1.<\/li>\n<\/ul>\n

        Ces notes guident la fabrication et la s\u00e9lection pr\u00e9cises, am\u00e9liorant ainsi la fiabilit\u00e9 des assemblages m\u00e9caniques.<\/p>\n<\/div>\n

        \n

        Foire aux questions (FAQ)<\/h2>\n
          \n
        1. Quel est l\u2019objectif de la normalisation des longueurs nominales\u00a0?<\/strong>
          \nLa standardisation garantit l'interchangeabilit\u00e9, simplifie la conception et optimise la production, r\u00e9duisant ainsi les co\u00fbts et les erreurs d'assemblage.<\/li>\n
        2. Quelles sont les diff\u00e9rences de tol\u00e9rance entre les grades de produits A, B et C\u00a0?<\/strong>
          \nLa qualit\u00e9 A offre les tol\u00e9rances les plus strictes en mati\u00e8re de pr\u00e9cision ; la qualit\u00e9 B offre une pr\u00e9cision \u00e9quilibr\u00e9e ; la qualit\u00e9 C est plus tol\u00e9rante pour les applications sensibles aux co\u00fbts.<\/li>\n
        3. Quand faut-il utiliser des fixations enti\u00e8rement filet\u00e9es\u00a0?<\/strong>
          \nSi les calculs donnent une tige non filet\u00e9e \u2264 0,5d, optez pour un filetage complet afin de maintenir la r\u00e9sistance et la simplicit\u00e9.<\/li>\n
        4. Pourquoi \u00e9viter d'indiquer les longueurs entre parenth\u00e8ses\u00a0?<\/strong>
          \nCe sont des pr\u00e9f\u00e9rences secondaires\u00a0; privil\u00e9gier les longueurs non entre parenth\u00e8ses favorise la coh\u00e9rence et la disponibilit\u00e9.<\/li>\n
        5. Comment calculer la longueur du filetage pour les tailles non r\u00e9pertori\u00e9es dans un tableau\u00a0?<\/strong>
          \nUtilisez les formules : b = 2d + 6 mm (l \u2264 125 mm), b = 2d + 12 mm (125 200 mm).<\/li>\n
        6. Quelles sont les tol\u00e9rances applicables aux longueurs de filetage\u00a0?<\/strong>
          \nConform\u00e9ment \u00e0 la norme ISO 4759-1, pour les vis et les goujons avec entra\u00eenements, les tol\u00e9rances assurent une bonne prise ; pour les types fendus, +2P \/ 0.<\/li>\n<\/ol>\n<\/div>\n

           <\/p>","protected":false},"excerpt":{"rendered":"

          Article Outline This guide details standards for nominal lengths and thread lengths of bolts, screws, and studs, based on ISO 888:2012 and related tolerances from ISO 4759-1. The structure is as follows: Introduction to Length Standards Nominal Length Standards Thread Length Standards Key Notes and Calculations Frequently Asked Questions (FAQ) Introduction to Length Standards Standards […]<\/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-5727","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\/5727","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=5727"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts\/5727\/revisions"}],"predecessor-version":[{"id":5729,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts\/5727\/revisions\/5729"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/media?parent=5727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/categories?post=5727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/tags?post=5727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}