One New Aftermarket Replacement Flanged Nut Fits Case Backhoe Loader ModelsThis 1-3/4" x 12 NF flanged nut (part 181042A1 / D120610) is used in two distinct applications on Fits Case backhoe loaders: as the lower swing tower-to-frame pin nut on 580D and 580 Super E models, and as the boom-to-dipper stick pin nut on 580K through 590SN series machines. The integrated flange spreads clamping load and resists loosening under the heavy vibration and dynamic loads common to backhoe operation.Specifications Thread Size: 1-3/4" x 12 NF Type: Flanged Hex Nut Weight: approx. 1 lb Compatible ModelsFits Case / Fits Case IH Backhoe Loaders:Swing Tower Lower Pin Application: 580D, 580 Super E (580SE)Boom-to-Dipper Stick Pin Application: 580K, 580SK, 580L, 580SL, 580M, 580SM, 580N, 580SN, 590, 590 Super L, 590SL, 590SM, 590SN, 570LXTReplaces Part Number(s):181042A1, D120610New aftermarket replacement part - not remanufactured, not used.