From Drag Specialties:

Replacement gas caps for OEM and custom tanks, available with or without a vent

DS-390130, DS-390193 and 0703-0431 are stamped steel construction

All other PART #s are cast aluminum construction

Will not fit screw-in type tanks

Sold each

Fits:

1979 - 1980 Harley-Davidson 1200 Fat Bob - FXEF

1977 - 1979 Harley-Davidson 1200 Low Rider - FXS

1973 - 1978 Harley-Davidson 1200 Super Glide - FX

1973 - 1980 Harley-Davidson 1200 Super Glide - FXE

1978 - 1982 Harley-Davidson 80 Electra Glide - FLH

1981 Harley-Davidson 80 Electra Glide Heritage - FLH

1979 - 1981 Harley-Davidson 80 Fat Bob - FXEF

1979 - 1982 Harley-Davidson 80 Low Rider - FXS

1980 - 1982 Harley-Davidson 80 Sturgis - FXB

1979 - 1980 Harley-Davidson 80 Super Glide - FXE

1980 - 1982 Harley-Davidson 80 Wide Glide - FXWG

1973 - 1980 Harley-Davidson Electra Glide - FL

1973 - 1982 Harley-Davidson Electra Glide - FLH

1977 Harley-Davidson Electra Glide - FLHS

1980 - 1981 Harley-Davidson Electra Glide - FLHS

1977 - 1981 Harley-Davidson Electra Glide Classic - FLH 1200

1979 - 1982 Harley-Davidson Electra Glide Classic - FLH 80

1982 Harley-Davidson Electra Glide Sport - FLHS

1979 - 1982 Harley-Davidson Roadster - XLS

1973 - 1979 Harley-Davidson Sportster - XLCH 1000

1973 - 1982 Harley-Davidson Sportster - XLH 1000

1977 - 1978 Harley-Davidson Sportster - XLT

1977 - 1978 Harley-Davidson Sportster Cafe Racer - XLCR 1000