HD-OEM: 24016-80Part Number: 12-0609 UOM: 1 - EA Summary:Jims pinion shaft nut measures 3/4" -20.Fitment: FL 1981-1984 FX 1981-1984 FLT 1981-1989 FXST 1984-1989 FXR 1982-1989 FLST 1986-1989 Measurements: Nut measures: 3/4" -20Country of Origin: USA