These heavy-duty truck U-bolts are important fasteners for SHACMAN heavy truck suspension and axle assembly. They secure the leaf spring to the axle housing and prevent relative shifting between axle and spring. Made of high strength alloy steel, quenched and tempered for excellent tensile strength. High fatigue resistance, not easy to stretch or fracture under heavy load and bumpy road. Precision thread machining ensures tight fitting with nuts for reliable clamping force. Each U-bolt undergoes tensile test and dimensional inspection before delivery. Solve common problems such as loose fasteners, spring displacement and axle shifting. Vital replacement spare parts for truck suspension overhaul and maintenance.