Harley-Davidson FLFB high beam and low beam headlight bulbs both utilize the H5006 size. The replacement chart covers 1965 to 1969 production years with corresponding bulb specifications.
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 FLFB 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 built to a 5.75-inch round form factor, which is a standardized size governed by ANSI specifications recognized in both the United States and Canada.
Because the same H5006 unit fills both the high beam and low beam positions, the FLFB headlight assembly relies on a single sealed beam type to handle both lighting functions rather than separate bulb types for each.
The ANSI standardization of the H5006 means the unit conforms to fixed dimensional and electrical output requirements, allowing interchangeability among compliant products from different manufacturers.