This gasket / O-ring seals the sending unit to the gas tank with the help of the lock ring
Fits:
1963 Ford 300
Ford Bronco (1966-1986)
Ford Country Sedan (1960-1968)
Ford Country Squire (1957-1968)
Ford Custom (1964-1968)
Ford E-100 Econoline (1969-1983)
Ford E-150 Econoline (1975-1983)
Ford E-200 Econoline (1969-1974)
Ford E-250 Econoline (1975-1983)
Ford E-300 Econoline (1969-1974)
Ford E-350 Econoline (1975-1983)
Ford Econoline (1964-1967)
Ford F-100 (1967-1983)
Ford F-150 (1975-1988)
Ford F-250 (1967-1988)
Ford F-350 (1967-1988)
Ford Fairlane (1960-1970)
Ford Falcon (1960-1970)
Ford Galaxie (1960-1968)
Ford Maverick (1970-1977)
Ford Mustang (1965-1973,1979-1998)
Ford Mustang II (1974-1978)
Ford Ranch Wagon (1960-1968)
Ford Thunderbird (1961-1976)
Ford Torino (1968-1976)
Mercury Comet (1960-1969, 1971-1977)
Mercury Cougar (1967-1973)