The Fabtech round U-bolt kit is specified as 1/2-20 x 8.70 x 2.75 (product notes list 2.75 in. x 8.70 in. x 1/2 in.-20) for rear leaf spring attachment. Marketed to help lift the back of a truck, this simple and cost-effective kit secures the springs to the axle and serves as a practical component when completing a rear suspension lift.
Fabtech Round U-Bolt Kit - 1/2-20 x 8.70 x 2.75