HD-OEM: 24023-54Part Number: 12-0613 UOM: 1 - EA Summary:Jims pinion shaft left hand nut measures 5/8" x 24.Fitment: FL 1954-1984 FX 1954-1984 FXST 1984-1989 FLT 1979-1989 FXR 1982-1989 FLST 1986-1989 Country of Origin: USA