This front axle nut kit is designed for select Polaris Sportsman 4x4 models and includes one castle nut, one washer, and one cotter pin for a single front axle. The components are manufactured to match OEM dimensions and thread specifications for proper fit and secure axle retention when used on compatible applications. This kit replaces Polaris part numbers 7542810 (castle nut), 7556004 (washer), and 7661404 (cotter pin). One kit services one front axle; order two kits if servicing both front axles. Verify model, year, and drivetrain configuration before ordering to ensure correct fitment. Fits the Following Models: 1997–2014 Sportsman 500 (4x4 models) 2014–2017 Sportsman 570 (4x4 models) 2003–2005 Sportsman 600 2002–2007 Sportsman 700 2005–2014 Sportsman 800 Replaces Polaris Part Number(s): 7542810 7556004 7661404