605481 Spacer/Bushing Hustler OEM 605481 Idler Spacer is Often Used to Enable the Bolt on the Idler Arm to Retains the Tensioner Idler Spring. 605481 Enables a Longer Bolt to Be Properly Tightened on the Idler Arm Allowing for a Spring Hook to Hook onto it. Review the Parts Diagrams in the Images Above & and Model Fit Chart Below to Ensure a Correct Fit. Inside Diameter Is Sized For a 3/8" Fastener Model Fit Chart Raptor FLIP-UP Models (2015 - 2023 Models) * Hydraulic Drive Idler Tensioner Arm 933614, 933622, 933846US, 933853US, 938464, 938472, 940312, 940320 FasTrack (2015 - Current Models) * Hydraulic Drive Idler Tensioner Arm 933424, 933432, 933440, 934851, 935627, 936054, 936062, 936070, 936088, 936104, 936112, 936120, 936138, 936146US, 936153US, 936161US, 938043, 938050, 938704, 938712, 938720, 938738, 938746, 938753, 938761, 938779, 938787, 938795, 940346, 940353, 940361, 940379, 940387, 940395, 940403, 940411, 940429, 940437, 941724, 941732, 941740, 941757, 941765, 941773, 941781, 941674, 941682, 941708, 943704, 943753, 943761