This semi-round U-bolt kit fits Mack suspension applications and comes as a 2-piece pack. Each kit includes one semi-round U-bolt, two U-bolt nuts, and two washers to secure the leaf spring to the axle housing. The bent, contoured shape conforms to the axle housing for a proper clamp fit.Interchanges:Mack 7QK3164P2FUB-5074This unit is sold in packs of 2.FeaturesSemi-round U-bolt designSold as a 2-piece packKit includes U-bolt, two U-bolt nuts, and two washersSuspension componentTech SpecsKit contents: 1x Semi-Round U-Bolt (FUB-5074-001), 2x U-Bolt Nut (FNU-4803, 21AX781), 2x Washer (FWA-0398, 35AX1503)Sell pack: 2 pieces