The Fabtech round U-bolt kit for rear leaf springs is listed as 5/8-18 x 5.35 x 3.75 (noted as 3.75 in. x 5.35 in. x 5/8 in.-18). Designed to help lift the back of a truck, this economical kit provides a simple fastening solution to secure springs to the axle and finish a rear suspension modification when paired with the appropriate lift components.
Fabtech Round U-Bolt Kit - 5/8-18 x 5.35 x 3.75