The Fortpro 3120 Heavy-Duty Front Brake Drum is engineered as a direct replacement for Gunite 3120, servicing 16.50 in. x 7.00 in. drum brake assemblies on commercial semi-trucks and heavy vehicles. Designed for outboard mounting on disc wheel systems, this cast iron brake drum features a 9.44 in. pilot diameter, 11.25 in. bolt circle diameter, 10 bolt holes (0.84 in. dia.), 7.52 in. brake surface width, and a 22,500 lbs axle rating for optimal thermal performance and reliable stopping power.
Fortpro is a trusted leader in the development and manufacturing of premium-quality truck parts designed to meet the demands of semi-trucks and heavy-duty trucks. Renowned for innovation, durability, and reliability, Fortpro products are engineered to enhance performance, safety, and efficiency across a wide range of trucking applications.
Whether you're seeking OEM replacement parts or upgrades, Fortpro provides a diverse selection of components backed by a global reputation for quality and innovation. Trust Fortpro for the parts you need to keep your vehicles on the road longer and stronger.
Basic Part Information4 attributes
| Product Line | Brakes |
|---|---|
| Category Name | Brake Drums |
| Part Type | Brake Drum |
| OEM Part Number | 3120 |
Application/Fitment Attributes7 attributes
| Application Type | Heavy Duty Trucks, Semi-Trucks |
|---|---|
| Bolt Circle Diameter (BCD) | 11.25 in. |
| Bolt Hole Diameter | 0.84 in. |
| Bolt Hole Quantity | 10 |
| Mounting Type | Outboard |
| Pilot Diameter | 9.44 in. |
| Wheel Type | Disc |
Dimensional/Physical Attributes4 attributes
| Brake Diameter (I.D.) | 16.50 in. |
|---|---|
| Brake Size (Dia x Width) | 16.50 in. x 7 in. |
| Brake Shoe Width | 7 in. |
| Brake Surface Width | 7.52 in. |
Technical/Performance Attributes2 attributes
| Axle Rating (Capacity) | 22.500 lb. |
|---|---|
| Mounting Flange Thickness | 0.59 in. |
- Gunite: 3120
- International: ZBR3120
- Mack: 3398-3120:
- Meritor: 3120877002