Mack DMC Headlight Bulb Size
Mack DMC headlight bulb sizes include H6024, H4651, and H5001 for high beam applications, along with H6024, H4656, and H5006 for low beam configurations, with each bulb size corresponding to specific lighting functions. The replacement chart covers 1981 through 1986 vehicle production years and documents bulb size specifications across that period.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
High Beam Headlight
| Years | Bulb Size |
|---|---|
| 1984-1986 | H6024 (With 2 Round Headlamps) |
| H4651 (With 4 Rectangular Headlamps) | |
| H5001 (With 4 Round Headlamps) | |
| 1981-1982 | H6024 (With 2 Round Headlamps) |
| H4651 (With 4 Rectangular Headlamps) | |
| H5001 (With 4 Round Headlamps) |
Low Beam Headlight
| Years | Bulb Size |
|---|---|
| 1984-1986 | H6024 (With 2 Round Headlamps) |
| H4656 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1982 | H6024 (With 2 Round Headlamps) |
| H4656 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1981 | H6024 (With 2 Round Headlamps) |
| H4652 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H6024 |
| ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H4651 |
| ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H5001 |
| ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H4656 |
| ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H5006 |
| ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit, variant of H4651. Not a replaceable bulb — the entire unit is replaced. 12V. | H4652 |