Mack DM Headlight Bulb Size

Mack DM high beam and low beam headlight bulbs utilize 3 distinct sizes each, including H6024, H4651, and H5001 for high beam applications and H6024, H4656, and H5006 for low beam applications. The replacement chart covers vehicle production from 1981 through 1997.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

YearsBulb TypeShop
1981-1997H6024 (With 2 Round Headlamps)Check Price
H4651 (With 4 Rectangular Headlamps)Check Price
H5001 (With 4 Round Headlamps)Check Price

Low Beam Headlight

YearsBulb TypeShop
1997H6024 (With 2 Round Headlamps)Check Price
H4656 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1994-1996H6024 (With 2 Round Headlamps)Check Price
H4652 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1993H6024 (With 2 Round Headlamps)Check Price
H4656 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1992H6024 (With 2 Round Headlamps)Check Price
H4652 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1990-1991H6024 (With 2 Round Headlamps)Check Price
H4656 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1989H6024 (With 2 Round Headlamps)Check Price
H4652 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1988H6024 (With 2 Round Headlamps)Check Price
H4656 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1985-1987H6024 (With 2 Round Headlamps)Check Price
H4652 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1984H6024 (With 2 Round Headlamps)Check Price
H4656 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1983H6024 (With 2 Round Headlamps)Check Price
H4652 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1982H6024 (With 2 Round Headlamps)Check Price
H4656 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price
1981H6024 (With 2 Round Headlamps)Check Price
H4652 (With 4 Rectangular Headlamps)Check Price
H5006 (With 4 Round Headlamps)Check Price

Bulb Specifications

Description Type Shop
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.H6024Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.H4651Check Price
ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.H5001Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.H4656Check Price
ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.H5006Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit, variant of H4651. Not a replaceable bulb — the entire unit is replaced. 12V.H4652Check Price

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