Mack RD Headlight Bulb Size
The Mack RD headlight bulb size chart specifies high beam and low beam bulb options including H6024, H4651, H5001, H4656, and H5006 sizes for this truck model. The replacement chart covers vehicle production data spanning 1981 to 1997.
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 |
|---|---|
| 1981-1997 | H6024 (With 2 Round Headlamps) |
| H4651 (With 4 Rectangular Headlamps) | |
| H5001 (With 4 Round Headlamps) |
Low Beam Headlight
| Years | Bulb Size |
|---|---|
| 1997 | H6024 (With 2 Round Headlamps) |
| H4656 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1996 | H6024 (With 2 Round Headlamps) |
| H4652 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1994-1995 | H6024 (With 2 Round Headlamps) |
| H4656 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1993 | H6024 (With 2 Round Headlamps) |
| H4652 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1992 | H6024 (With 2 Round Headlamps) |
| H4656 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1987-1991 | H6024 (With 2 Round Headlamps) |
| H4652 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1984-1986 | H6024 (With 2 Round Headlamps) |
| H4656 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1982-1983 | H6024 (With 2 Round Headlamps) |
| H4652 (With 4 Rectangular Headlamps) | |
| H5006 (With 4 Round Headlamps) | |
| 1981 | H6024 (With 2 Round Headlamps) |
| H4656 (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 |