This round U-bolt kit fits Mack trucks and is sold as a pack of two complete kits, each containing one round U-bolt and two nuts. It wraps around the axle housing with threaded ends running through the spring plate to secure the axle to the leaf spring pack. The included nuts allow for a complete installation without sourcing separate hardware.Interchanges:7QK21707QK2170P3Mack 25158565FUB-4961This unit is sold in packs of 2.FeaturesRound U-bolt kit, sold as a pack of 2 complete kitsEach kit includes 1 round U-bolt (FUB-4961-100) and 2 nuts (ANU-5835)OEM number 7QK2170Suspension partTech SpecsSell pack: 2 kitsKit contents: 1x Round U-Bolt (FUB-4961-100), 2x Nut (ANU-5835)