The ICON Vehicle Dynamics 2011-2024 Ford F-250/F-350 Super Duty 12* U-bolt kit consists of high-quality grade 8 U-bolts to ensure that the leaf springs stay properly secured to the rear axle. Featuring a black E-coat finish for corrosion resistance and a length of 12* these U-bolts will work with a variety of leaf spring and rear block options. All mounting nuts and washers are also included to make sure installation is quick and easy. The ICON Vehicle Dynamics 12* U-bolt kit consists of high-quality grade 8 U-bolts featuring a black E-coat finish for corrosion resistance. All mounting nuts and washers are also included to make sure installation is quick and easy.