Plymouth Fury III high beam headlight bulbs measure H5001 size while low beam headlight bulbs measure H5006 size. The replacement chart contains vehicle production years and bulb size specifications spanning 1965 to 1974.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Fury III uses two distinct sealed beam headlight units across its 1965-1974 model range: the H5001 for high beam and the H5006 for low beam.
Both the H5001 and H5006 are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H5001 is a 4-inch square sealed beam unit operating at 12 volts and conforming to ANSI standards recognized in both the United States and Canada.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12 volts and built to the same ANSI standard applicable in the United States and Canada.
Because the H5001 and H5006 differ in both shape and size, the two units are not interchangeable with each other. The square H5001 occupies the high beam position, while the round H5006 occupies the low beam position.
The H5001 and H5006 designations follow the ANSI sealed beam numbering system, which standardizes physical form factors across manufacturers, allowing units from different brands to fit the same housing provided the correct designation is matched.
The 12-volt rating on both units is consistent with the 12-volt electrical systems standard in passenger vehicles of this era, distinguishing them from older 6-volt sealed beam types that share similar physical profiles.