Plymouth Fleet Special high beam headlight bulbs measure H5001 in size, while low beam headlight bulbs measure H5006, with each bulb size corresponding to specific lighting functions. The replacement chart covers 1960 through 1963 production years and details bulb size specifications for each model year.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Fleet Special used two distinct sealed beam headlight types across the 1960-1963 model years: the H5001 for high beam duty and the H5006 for low beam duty.
The H5001 is a 4-inch square sealed beam unit operating at 12 volts, built 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 conforming to the same ANSI standards applicable in the United States and Canada.
Both the H5001 and H5006 are sealed beam assemblies, meaning the lens, reflector, and filament form a single fused unit; when the filament fails, the entire assembly requires replacement rather than an internal bulb swap.
The square profile of the H5001 and the round profile of the H5006 make the two units physically incompatible with each other, and substituting one for the other is not possible without modifying the housing.
The H5001 high beam specification remained unchanged across all four model years of the Plymouth Fleet Special covered in these records, from 1960-1963.
The H5006 low beam specification was equally consistent across the same 1960-1963 span, indicating no mid-cycle change to the low beam housing or electrical requirements during that period.