This U-bolt kit fits Mack universal suspension applications and is sold as a 2-pack, with each kit containing one U-bolt along with two washers and two nuts for a full hardware set. It clamps the axle housing to the leaf spring, keeping the assembly secured and axle alignment maintained. The kit is built as an aftermarket replacement for the suspension mounting hardware.Interchanges:251612397QK3152P1Mack 7QK3152This unit is sold in packs of 2.FeaturesSold as a 2-pack, each kit containing one U-bolt assemblyKit includes U-bolt (FUB-4781-001), two washers (FWA-0180 / OEM 35AX1435), and two nuts (FNU-4719 / OEM 21AX655)Fits Mack universal suspension applicationsSuspension partTech SpecsKit contents: 1x U-bolt (FUB-4781-001), 2x washer (FWA-0180 / 35AX1435), 2x nut (FNU-4719 / 21AX655)Sell pack: 2 pieces