These 11.4" square U-bolts are designed for 2004–2020 Ford F-150 rear leaf spring suspension setups where extended-length hardware is needed, including applications using 2"–4" lift leafs in conjunction with OEM front leaf springs. Specs include an overall length of about 11.4" measured from the bottom of the bend to the end of the threads, a 9/16" thread pitch/diameter, and a square-bend profile sized for typical axle and spring pack clamping. Made from high-strength Grade 8 steel with a zinc-plated finish for improved corrosion resistance, these U-bolts are built to provide strong, consistent clamping force to help secure leaf springs, axle tubes, and lift blocks with proper thread engagement. The kit includes 4 U-bolts, 8 thicker washers, and 8 tall lock nuts for a complete installation. Installation is straightforward with basic tools, and fasteners should be torqued to the vehicle or suspension manufacturer’s specification and rechecked after initial driving.