The Triumph GT6 high beam and low beam headlight bulbs both utilize the H6024 size. The replacement chart covers vehicle production spanning 1967 to 1973.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Triumph GT6 uses the H6024 bulb type across all listed model years, 1967-1973, for both high beam and low beam headlight positions.
The H6024 is an ANSI-standard sealed beam unit recognized in the United States and Canada, operating at 12 volts.
A sealed beam unit integrates the filament, reflector, and lens into a single non-serviceable assembly, meaning the entire unit is replaced rather than an internal bulb.
The H6024 is a 7-inch round sealed beam format, which was a regulated standard size for round headlights in North American automotive applications during this period.
Because the GT6 uses the same H6024 unit for both high and low beam functions, the two positions draw from an identical part, which simplifies sourcing but does not indicate that a single physical unit serves both functions simultaneously.
The H6024 designation follows ANSI standardization, meaning units from different manufacturers sharing this designation are generally interchangeable as long as the ANSI specification is met.