{"id":3017,"date":"2025-06-09T17:12:43","date_gmt":"2025-06-09T09:12:43","guid":{"rendered":"https:\/\/machinedwasher.com\/?post_type=product&p=3017"},"modified":"2025-06-09T17:22:37","modified_gmt":"2025-06-09T09:22:37","slug":"leaf-spring-u-bolt","status":"publish","type":"product","link":"https:\/\/machinedwasher.com\/fr\/products\/leaf-spring-u-bolt\/","title":{"rendered":"Custom Leaf Spring U Bolt with Nut Zinc Plating for Truck Spare Parts Rear"},"content":{"rendered":"

What Are Leaf Spring U Bolts?<\/strong><\/h3>\n

Leaf spring U bolts<\/strong> are heavy-duty, U shaped fasteners specifically engineered to secure leaf spring assemblies to axles in vehicles and machinery. Their unique design clamps the spring pack while withstanding dynamic loads, vibrations, and shock impacts.<\/p>\n

\n

Leaf Spring U Bolt: Specifications<\/strong><\/h3>\n

1. Material<\/strong><\/h4>\n
    \n
  • \n

    Carbon Steel (Grade 8.8)<\/strong>: Cost-effective for standard vehicles<\/p>\n<\/li>\n

  • \n

    Alloy Steel (4140)<\/strong>: Heat-treated for heavy trucks (up to 180,000 PSI tensile)<\/p>\n<\/li>\n

  • \n

    Stainless Steel (316)<\/strong>: Corrosion-resistant for marine\/off-road use<\/p>\n<\/li>\n<\/ul>\n

    2. Surface Treatment<\/strong><\/h4>\n
      \n
    • \n

      Hot-Dip Galvanized<\/strong>: 85-micron coating for salt\/snow environments<\/p>\n<\/li>\n

    • \n

      Dacromet\u00ae Coating<\/strong>: Zinc-flake technology (1,000+ hrs salt spray)<\/p>\n<\/li>\n

    • \n

      Black Oxide<\/strong>: OEM aesthetic + mild corrosion resistance<\/p>\n<\/li>\n<\/ul>\n

      3. Common Specifications<\/strong><\/h4>\n
        \n
      • \n

        Diameter<\/strong>: 10mm\u201324mm (M10\u2013M24)<\/p>\n<\/li>\n

      • \n

        Inside Width<\/strong>: Matches axle tube diameter (50mm\u2013150mm typical)<\/p>\n<\/li>\n

      • \n

        Thread Length<\/strong>: 2.5\u00d7 bolt diameter minimum<\/p>\n<\/li>\n

      • \n

        Standards<\/strong>: SAE J429, DIN 3570<\/p>\n<\/li>\n<\/ul>\n

        4. Applications<\/strong><\/h4>\n
          \n
        • \n

          Commercial Trucks<\/strong>: Semi-trailer suspension systems<\/p>\n<\/li>\n

        • \n

          Agriculture<\/strong>: Tractor and harvester axle mounting<\/p>\n<\/li>\n

        • \n

          Military<\/strong>: Armored vehicle spring retention<\/p>\n<\/li>\n

        • \n

          Railway<\/strong>: Bogie spring block fastening<\/p>\n<\/li>\n<\/ul>\n

          \n

          Excellent Case: Mining Dump Truck Suspension Upgrade<\/strong><\/h3>\n

          Challenge<\/strong>:
          \nA mining operator experienced U bolt failures every 3 months on 100-ton dump trucks due to:<\/p>\n

            \n
          • \n

            Corrosion from acidic slurry<\/p>\n<\/li>\n

          • \n

            Fatigue from constant 5G shock loads<\/p>\n<\/li>\n<\/ul>\n

            Solution<\/strong>:<\/p>\n

              \n
            • \n

              Installed\u00a0Dacromet-coated 4140 alloy U bolts (M22)<\/strong>:<\/p>\n

                \n
              • \n

                Corrosion Protection<\/strong>: 5\u00d7 longer life vs. galvanized bolts<\/p>\n<\/li>\n

              • \n

                Fatigue Resistance<\/strong>: Shot-peened threads survived 1M+ cycles<\/p>\n<\/li>\n

              • \n

                Torque Retention<\/strong>: Serrated flange nuts prevented loosening<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                Results<\/strong>:<\/p>\n

                  \n
                • \n

                  Extended service interval from 3 to 18 months<\/p>\n<\/li>\n

                • \n

                  Reduced unplanned downtime by 67%<\/p>\n<\/li>\n

                • \n

                  Passed ISO 6336 fatigue testing<\/p>\n<\/li>\n<\/ul>\n

                  \n

                  Key Advantages<\/strong><\/h3>\n

                  \u2714\u00a0Vibration-Proof<\/strong>\u00a0\u2013 Locking nut options eliminate retorquing
                  \n\u2714\u00a0Custom Geometry<\/strong>\u00a0\u2013 Offset bends for clearance-critical designs
                  \n\u2714\u00a0Safety Compliance<\/strong>\u00a0\u2013 Meets DOT\/FMCSA roadside inspection standards<\/p>","protected":false},"excerpt":{"rendered":"

                  Custom Leaf Spring U Bolt with Nut Zinc Plating for Truck Spare Parts Rear<\/p>","protected":false},"featured_media":3024,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[33],"product_tag":[614,623,620,621,619,615,618,616,622,617],"class_list":{"0":"post-3017","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-u-bolts","7":"product_tag-leaf-spring-u-bolt","8":"product_tag-leaf-spring-u-bolt-50mm-wide","9":"product_tag-leaf-spring-u-bolt-kit","10":"product_tag-leaf-spring-u-bolt-nuts","11":"product_tag-leaf-spring-u-bolt-plate","12":"product_tag-leaf-spring-u-bolts","13":"product_tag-stainless-steel-u-bolt","14":"product_tag-u-bolt","15":"product_tag-u-bolt-for-leaf-spring","16":"product_tag-u-bolts","18":"first","19":"instock","20":"shipping-taxable","21":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/product\/3017","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/comments?post=3017"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/media\/3024"}],"wp:attachment":[{"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/media?parent=3017"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/product_brand?post=3017"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/product_cat?post=3017"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/machinedwasher.com\/fr\/wp-json\/wp\/v2\/product_tag?post=3017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}