The Harley-Davidson FLHFB uses an H5006 bulb size for both high beam and low beam headlight applications. This replacement chart covers vehicle production spanning 1965 to 1969.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H5006 is an ANSI-standardized sealed beam unit used in both the high beam and low beam headlight positions of the Harley-Davidson FLHFB across the 1965-1969 model years.
As a sealed beam unit, the H5006 does not contain a replaceable bulb element. The entire assembly is replaced as a single unit when the light fails or is damaged.
The H5006 operates at 12 volts and is constructed as a 5.75-inch round sealed beam, with the lens, reflector, and filament enclosed within one sealed glass housing.
The H5006 conforms to ANSI standards recognized in both the United States and Canada, meaning the unit meets a defined and regulated performance specification rather than a proprietary one.
The identical H5006 specification applies to both the high beam and low beam positions, indicating the FLHFB uses the same physical sealed beam unit for each function rather than separate bulb types.