Large Nut with valve:- Air assisted fork nuts to fit and replace Original Harley Part No: 45419-80 1980-1986 FXWG, 1984-1996 Softails 1983 FLT.FLHT CLASSICS: 1984 UP FXST 1987-1998 FXSTC, FLST / C / F / N 1993-1998 FXDWG. DYNA Valves Only:- Air assisted fork valve fittings for original Harley Nuts Parts No:45990-88 FXRS-SP-FXRS-CON, FXLR. FXDB-S, FXDL-FXDS-CON-FXD-FXDB-D-FXDC