This flat U-bolt kit for Mack suspension applications is sold as a pack of two complete kits, each. Every kit contains one flat U-bolt, two washers, and two nuts for clamping the leaf spring assembly to the axle housing. Fitted correctly, the hardware helps keep the spring assembly secure and resists axle shift under load.Interchanges:Mack 7QK3154P9Mack 7QK3131P11This unit is sold in packs of 2.FeaturesSold as a 2-piece pack, each containing one complete U-bolt kitEach kit includes one flat U-bolt, two washers, and two nutsFlat U-bolt component: FUB-4776-001Washer component: FWA-0180Nut component: FNU-4719Tech SpecsKit contents: 1x Flat U-Bolt (FUB-4776-001), 2x Washer (FWA-0180), 2x Nut (FNU-4719)Sell pack: 2 kits