{"id":3968,"date":"2026-08-18T07:55:06","date_gmt":"2026-08-18T07:55:06","guid":{"rendered":"https:\/\/www.rlfasteners.com\/?p=3968"},"modified":"2026-09-02T07:55:48","modified_gmt":"2026-09-02T07:55:48","slug":"anti-seize-vs-threadlocker","status":"publish","type":"post","link":"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/","title":{"rendered":"Anti-Seize vs Threadlocker: How Do Anti-Seize Compounds and Threadlockers Alter Bolt Friction Coefficients and Torque Calculations?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_69_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u76ee\u6b21\u3092\u5207\u308a\u66ff\u3048\u308b\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u30c8\u30b0\u30eb<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Quick_Answer\" title=\"Quick Answer:\">Quick Answer:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Why_do_anti-seize_and_threadlocker_serve_opposite_purposes\" title=\"Why do anti-seize and threadlocker serve opposite purposes?\">Why do anti-seize and threadlocker serve opposite purposes?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Friction_changes_bolt_tension\" title=\"Friction changes bolt tension\">Friction changes bolt tension<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#What_is_anti-seize_and_when_should_it_be_used\" title=\"What is anti-seize and when should it be used?\">What is anti-seize and when should it be used?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Effect_on_torque_calculations\" title=\"Effect on torque calculations\">Effect on torque calculations<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#What_is_threadlocker_and_when_should_it_be_used\" title=\"What is threadlocker and when should it be used?\">What is threadlocker and when should it be used?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Controlling_vibration-induced_loosening\" title=\"Controlling vibration-induced loosening\">Controlling vibration-induced loosening<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Why_should_anti-seize_and_threadlocker_generally_not_be_used_together\" title=\"Why should anti-seize and threadlocker generally not be used together?\">Why should anti-seize and threadlocker generally not be used together?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Lubrication_or_locking\" title=\"Lubrication or locking\">Lubrication or locking<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Where_are_anti-seize_and_threadlocker_used_in_automotive_applications\" title=\"Where are anti-seize and threadlocker used in automotive applications?\">Where are anti-seize and threadlocker used in automotive applications?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Exhaust_and_high-temperature_joints\" title=\"Exhaust and high-temperature joints\">Exhaust and high-temperature joints<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Engine_and_drivetrain_assemblies\" title=\"Engine and drivetrain assemblies\">Engine and drivetrain assemblies<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#Chassis_and_serviceable_components\" title=\"Chassis and serviceable components\">Chassis and serviceable components<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#How_are_CNRL_bolts_designed_for_proper_lubrication_and_friction_control\" title=\"How are CNRL bolts designed for proper lubrication and friction control?\">How are CNRL bolts designed for proper lubrication and friction control?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/#CNRL_Your_Trusted_Fastener_Solution_Provider\" title=\"CNRL\u3001\u4fe1\u983c\u3067\u304d\u308b\u30d5\u30a1\u30b9\u30ca\u30fc\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\">CNRL\u3001\u4fe1\u983c\u3067\u304d\u308b\u30d5\u30a1\u30b9\u30ca\u30fc\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Quick_Answer\"><\/span>Quick Answer:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Anti-seize and threadlocker deal with different fastener issues. The use of anti-seize reduces friction and prevents corrosion or galling. The threadlocker is utilized to provide resistance to any unwanted movement of the threads. This is also one of the reasons why their effects on torque values differ. Using anti-seize on bolts can reduce friction between the threads, and therefore, using the same torque can increase bolt tension compared to the use of dry threads. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The use of thread locker can also influence the friction value during assembly depending on its type and condition. Therefore, torque values need to be appropriate according to the specified thread condition. The dry torque value cannot be automatically considered when lubrication or chemical treatment is used. CNRL produces automotive fasteners for engines, chassis, transmissions, brakes, among others, in vehicles.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/www.rlfasteners.com\/wp-content\/uploads\/2026\/09\/1f5d15e4b0702e485ce4c12566b6b683-3-1024x512.png\" alt=\"\" class=\"wp-image-3988\" srcset=\"https:\/\/www.rlfasteners.com\/wp-content\/uploads\/2026\/09\/1f5d15e4b0702e485ce4c12566b6b683-3-1024x512.png 1024w, https:\/\/www.rlfasteners.com\/wp-content\/uploads\/2026\/09\/1f5d15e4b0702e485ce4c12566b6b683-3-300x150.png 300w, https:\/\/www.rlfasteners.com\/wp-content\/uploads\/2026\/09\/1f5d15e4b0702e485ce4c12566b6b683-3-18x9.png 18w, https:\/\/www.rlfasteners.com\/wp-content\/uploads\/2026\/09\/1f5d15e4b0702e485ce4c12566b6b683-3-768x384.png 768w, https:\/\/www.rlfasteners.com\/wp-content\/uploads\/2026\/09\/1f5d15e4b0702e485ce4c12566b6b683-3.png 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_do_anti-seize_and_threadlocker_serve_opposite_purposes\"><\/span>Why do anti-seize and threadlocker serve opposite purposes?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The distinguishing factor when comparing anti-seize vs threadlocker can be found in how the joint behaves.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Anti-seize aids future removal of the joint. It coats the metals with a lubricant and protects the parts from getting stuck.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Threadlocker does something else entirely. It fills in the gaps within the mating threads and gets cured once assembly has taken place. It prevents any unwanted movement, especially if vibrations may cause loosening.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Both of these products affect the conditions within the threads. This means that none of them should be applied lightly to an automotive torque-controlled joint.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Friction_changes_bolt_tension\"><\/span>Friction changes bolt tension<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The torque force is not used for stretching of bolts. The torque force is partially consumed in overcoming friction in the threads and under the bolt head or nut.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Reduced friction results in increased force for the tensioning of bolts. When the lubrication changes but torque remains constant, the preload will be out of acceptable limits. That is why the condition of threads must be included in the torque specification.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_anti-seize_and_when_should_it_be_used\"><\/span>What is anti-seize and when should it be used?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Anti-seize is a lubricating compound applied to threaded or fitted metal surfaces. Its main purposes are to reduce galling, limit seizure, and make later disassembly easier. Knowing <strong>when to use anti-seize<\/strong> depends on the material and service conditions. It can be useful on fasteners exposed to heat, moisture, corrosion, or repeated removal.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Effect_on_torque_calculations\"><\/span>Effect on torque calculations<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Using <strong>anti-seize on bolts<\/strong> changes the friction between mating threads. The same effect can occur beneath a bolt head or nut if the compound reaches the bearing surface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because friction falls, applying the original dry torque can produce higher preload than expected. In some cases, this can overstress the bolt, threads, or clamped component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Torque should therefore be adjusted according to the approved <a href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/bolt\/torque-to-yield-bolts-guide\/\" target=\"_blank\" rel=\"noreferrer noopener\">torque specification<\/a> rather than using a universal correction factor.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_threadlocker_and_when_should_it_be_used\"><\/span>What is threadlocker and when should it be used?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Threadlocker is a chemical compound applied to mating threads before assembly. Many types cure after the fastener is installed and help resist rotation. This makes threadlocker for automotive joints useful where vibration or repeated movement could contribute to loosening.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common examples can include selected engine accessories, brackets, drivetrain parts, and chassis components. Whether threadlocker is required depends on the vehicle manufacturer&#8217;s joint specification.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Controlling_vibration-induced_loosening\"><\/span>Controlling vibration-induced loosening<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Knowing when to use threadlocker starts with understanding why the joint might loosen. A correctly tightened bolt creates preload that holds the joined surfaces together. If transverse vibration produces enough movement between those surfaces, clamp force can decrease, and the threaded connection may begin rotating.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Threadlocker adds resistance to this unwanted thread movement. However, it does not correct poor bolt selection, damaged threads, or an incorrect tightening procedure. Its effect on assembly friction must also be considered when establishing torque requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_should_anti-seize_and_threadlocker_generally_not_be_used_together\"><\/span>Why should anti-seize and threadlocker generally not be used together?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The basic rule is straightforward: do not combine them unless the approved joint specification specifically calls for that combination.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Anti-seize is intended to lubricate the threaded surfaces. Threadlocker needs suitable contact with the mating threads so it can perform as specified.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mixing the two can interfere with the intended behavior of either product. It can also make the resulting friction condition harder to predict.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is the practical answer behind many Loctite vs anti-seize comparisons. The decision should not be based on which product is stronger. It should be based on what the joint needs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lubrication_or_locking\"><\/span>Lubrication or locking<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For a fastener exposed to heat and likely to require later removal, the specification may call for anti-seize. For a vibration-sensitive joint where unwanted rotation is the main concern, it may specify threadlocker.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding when to use anti-seize and when to use threadlocker prevents one product from being used to solve the wrong problem.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_are_anti-seize_and_threadlocker_used_in_automotive_applications\"><\/span>Where are anti-seize and threadlocker used in automotive applications?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Automotive joints operate under very different temperatures, loads, vibration levels, and maintenance requirements. No single thread treatment is suitable for every bolt.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Exhaust_and_high-temperature_joints\"><\/span>Exhaust and high-temperature joints<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Exhaust hardware experiences heat, corrosion, and repeated thermal cycling. Where the manufacturer permits it, anti-seize may help prevent threads from seizing during future removal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The approved torque procedure still matters because the compound changes friction.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engine_and_drivetrain_assemblies\"><\/span>Engine and drivetrain assemblies<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Some engine and drivetrain joints require carefully controlled friction to reach the intended preload. Adding an unapproved lubricant can change that relationship. Other joints may specify threadlocker for automotive assembly because vibration resistance is important. The fastener drawing or service procedure should determine the treatment.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Chassis_and_serviceable_components\"><\/span>Chassis and serviceable components<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Suspension and chassis fasteners can experience vibration, water, dirt, and road salt. Depending on the design, engineers may use coatings, locking features, chemical threadlocker, or other methods. This is another reason the <strong>Loctite vs anti-seize<\/strong> question has no universal answer. Joint design and service requirements determine the appropriate approach.<\/p>\n\n\n\n<style>\n  .product-card {\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    height: 400px;\n    border: 1px solid #ddd;\n    border-radius: 10px;\n    overflow: hidden;\n    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);\n    max-width: 900px;\n    margin: 0 auto;\n    gap: 40px;\n    padding: 20px;\n    box-sizing: border-box;\n  }\n\n  .product-left,\n  .product-right {\n    flex: 1 1 50%;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    align-items: center;\n    text-align: center;\n  }\n\n  .product-left {\n    gap: 20px;\n  }\n\n  .product-title {\n    font-size: 24px;\n    font-weight: 700;\n    color: #b59d53;\n    margin: 0;\n  }\n\n  .product-button {\n    background-color: transparent;\n    color: #b59d53;\n    border: 2px solid #b59d53;\n    padding: 12px 24px;\n    font-size: 15px;\n    border-radius: 6px;\n    cursor: pointer;\n    transition: all 0.3s ease;\n    text-decoration: none;\n    display: inline-block;\n  }\n\n  .product-button:hover {\n    border-color: #333333;\n    color: #333333;\n    transform: scale(1.1);\n  }\n\n  .product-right img {\n    max-width: 100%;\n    max-height: 360px;\n    object-fit: contain;\n    border-radius: 10px;\n  }\n\n  @media (max-width: 768px) {\n    .product-card {\n      flex-direction: column;\n      height: auto;\n      padding: 15px;\n      gap: 15px;\n    }\n\n    .product-left,\n    .product-right {\n      flex: none;\n      width: 100%;\n      text-align: center;\n    }\n\n    .product-right img {\n      max-height: 300px;\n      margin-bottom: 15px;\n    }\n\n    .product-left {\n      order: 2;\n      gap: 10px;\n      align-items: center;\n    }\n\n    .product-right {\n      order: 1;\n    }\n  }\n<\/style>\n\n<div class=\"product-card\">\n  <div class=\"product-right\">\n    <img decoding=\"async\"\n      src=\"https:\/\/www.rlfasteners.com\/wp-content\/uploads\/2024\/11\/4-%E6%8B%B7%E8%B4%9D.jpg\"\n      alt=\"Automotive engine bolts and custom fasteners\"\n    \/>\n  <\/div>\n\n  <div class=\"product-left\">\n    <p class=\"product-title\">Automotive Engine Fasteners<\/p>\n\n    <a\n      href=\"https:\/\/www.rlfasteners.com\/ja\/products\/automotive-engine-fasteners-bushing-washer-bolts\/\"\n      target=\"_blank\"\n      class=\"product-button\"\n    >\n      \u8a73\u7d30\u60c5\u5831\n    <\/a>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_are_CNRL_bolts_designed_for_proper_lubrication_and_friction_control\"><\/span>How are CNRL bolts designed for proper lubrication and friction control?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bolt material and strength are only part of a torque-controlled joint. Surface treatment and friction also affect how tightening torque becomes preload.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CNRL produces <a href=\"https:\/\/www.rlfasteners.com\/ja\/product\/automotive\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u81ea\u52d5\u8eca\u7528\u30d5\u30a1\u30b9\u30ca\u30fc<\/a> from performance class 4.8 through 12.9. Its available surface treatments include zinc finishes, phosphating, trivalent chromium, Dacromet, oxidation, and other treatments based on customer requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CNRL also lists friction coefficient testing among its automotive fastener quality checks. This matters because <a href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/how-fasteners-coating-improves-performance-and-durability\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u8868\u9762\u51e6\u7406<\/a> can change the friction conditions used when determining assembly torque.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For OEM and custom projects, fastener dimensions, material, coating, surface requirements, and assembly conditions can be specified together. This approach helps avoid treating torque as an isolated value.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The same principle applies when comparing anti-seize vs threadlocker. The thread treatment must be considered together with the bolt and the required preload.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For projects that require a locking compound as part of the supplied fastener specification, application requirements should be confirmed during sourcing. <a href=\"https:\/\/www.rlfasteners.com\/ja\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\">CNRL\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044<\/a> to discuss pre-applied threadlocker fasteners and the required friction, coating, and torque specifications for automotive assemblies.<\/p>\n\n\n\n<style>\n  \/* \u53ea\u4f5c\u7528\u4e8e CTA \u5361\u7247\u5185\u90e8 *\/\n  .cnrl-card-container {\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    align-items: center;\n    gap: 24px;\n    text-align: center;\n\n    background-image:\n      linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),\n      url('https:\/\/www.rlfasteners.com\/wp-content\/uploads\/2025\/08\/image.jpeg');\n    background-size: cover;\n    background-position: center;\n\n    padding: 60px 20px;\n    border-radius: 8px;\n    color: #ffffff !important;\n    font-family: Arial, sans-serif;\n    box-shadow: 0 4px 6px rgba(0,0,0,0.1);\n    margin: 20px 0;\n  }\n\n  .cnrl-card-title {\n    margin: 0;\n    font-size: 24px;\n    font-weight: 700;\n    line-height: 1.3;\n    color: #ffffff !important;\n    opacity: 1 !important;\n    text-shadow: 0 1px 3px rgba(0,0,0,0.4);\n  }\n\n  .cnrl-card-desc {\n    margin: 0 !important;\n    font-size: 16px;\n    line-height: 1.5;\n    max-width: 600px;\n\n    \/* \u5f3a\u5236\u7eaf\u767d\uff0c\u9632\u6b62\u4e3b\u9898\u8986\u76d6 *\/\n    color: #ffffff !important;\n    opacity: 1 !important;\n    font-weight: 500;\n    text-shadow: 0 1px 3px rgba(0,0,0,0.5);\n  }\n\n  .cnrl-card-container .cnrl-card-desc,\n  .cnrl-card-container p {\n    color: #ffffff !important;\n  }\n\n  .cnrl-btn {\n    display: inline-block;\n    padding: 12px 30px;\n    background-color: #007BFF;\n    color: #ffffff !important;\n    text-decoration: none !important;\n    font-weight: 700;\n    border-radius: 4px;\n    transition: background-color 0.3s ease;\n    border: none;\n  }\n\n  .cnrl-btn:hover {\n    background-color: #0056b3;\n    color: #ffffff !important;\n  }\n<\/style>\n\n<div class=\"cnrl-card-container\">\n\n  <h3 class=\"cnrl-card-title\"><span class=\"ez-toc-section\" id=\"CNRL_Your_Trusted_Fastener_Solution_Provider\"><\/span>\n    CNRL\u3001\u4fe1\u983c\u3067\u304d\u308b\u30d5\u30a1\u30b9\u30ca\u30fc\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\n  <span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n  <p class=\"cnrl-card-desc\">\n    Professional Fastener Solutions &amp; Advices for Global OEMs\n  <\/p>\n\n  <a\n    href=\"https:\/\/www.rlfasteners.com\/ja\/contact\/\"\n    target=\"_blank\"\n    class=\"cnrl-btn\">\n    \u898b\u7a4d\u3082\u308a\u3092\u4f9d\u983c\u3059\u308b\n  <\/a>\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Quick Answer: Anti-seize and threadlocker deal with different fastener issues. The use of anti-seize reduces friction and prevents corrosion or galling. The threadlocker is utilized to provide resistance to any unwanted movement of the threads. This is also one of the reasons why their effects on torque values differ. Using anti-seize on bolts can reduce friction between the threads, and therefore, using the same torque can increase bolt tension compared to the use of dry threads. The use of thread locker can also influence the friction value during assembly depending on its type and condition. Therefore, torque values need to be appropriate according to the specified thread condition. The dry [&hellip;]<\/p>","protected":false},"author":1,"featured_media":3970,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[188],"tags":[],"class_list":["post-3968","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-comparison"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Anti-Seize vs Threadlocker: Bolt Friction &amp; Torque\uff5cCNRL<\/title>\n<meta name=\"description\" content=\"Compare anti-seize vs threadlocker and learn how each affects bolt friction, torque calculations, preload, and automotive applications.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rlfasteners.com\/ja\/blog\/automotive-fastener\/comparison\/anti-seize-vs-threadlocker\/\" 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