Mack Lower Insulator Pad 21036254, 10QK320

This is a heavy-duty lower spring bracket insulator (also called a load pad or suspension insulator). It is a critical component in the rear suspension systems of many Mack truck models.

Technical Specifications

Average Weight: ~ 4.1 kg

Dimensions: Length: 6.000 inches x Width: 6.000 inches x Height: 3.750 inches

Button Diameter: 1.750 inches

Compatibility: Commonly used in SS34, SS38, and SS44 series rear suspensions (rated for 17,236 to 20865 kg capacities).

Supersession: 10QK36B > 10QK36C > 10QK388 > 10QK320 > 21036254

SL: 1C

Key Information

It serves to cushion the load between the leaf springs and the suspension bracket, helping to extend the life of surrounding components and provide a smoother ride.