Nissan 620 headlight bulbs utilize H5001 size for high beam and H5006 size for low beam applications. The replacement chart covers 1975 through 1979 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Nissan 620 uses the H5001 sealed beam unit for high beam headlights across all listed model years, 1975-1979.
The H5001 is a 4-inch square sealed beam unit rated at 12V. Because it is a sealed beam design, the entire unit is replaced rather than an internal filament or capsule.
The low beam headlight position on the Nissan 620 uses the H5006 sealed beam unit across all listed model years, 1975-1979.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and also replaced as a complete unit rather than as an internal component.
Both the H5001 and H5006 conform to ANSI standards applicable in the United States and Canada, meaning they follow a standardized sizing and performance specification shared across many vehicle makes of that era.
The H5001 and H5006 are physically distinct units. The H5001 is square and the H5006 is round, so the two are not interchangeable between the high beam and low beam positions.