At a Glance
- >Hydraulic drum brake backing plate
- >12.25" diameter × 5" wide brake shoe configuration
- >7-bolt mounting pattern
- >Left-hand (street-side) orientation
- >Designed for 12K axle applications
- Brand: MAT
- SKU: 77-1212H-1
Before You Order
Match the part number, measurements and connection points that apply to your trailer.
Fitment Check
| Hub Face | Measure hub face to hub face. |
|---|---|
| Spring Center | Measure mounting centers and confirm perch configuration. |
| Capacity | Match the required axle rating. |
| Brakes | Confirm brake type and flange configuration. |
Product Details
Hydraulic Brake Backing Plate — 12.25" × 5", 7-Bolt, Left Side (12K Axles)
Part Number: 77-1212H-1
This hydraulic brake backing plate is designed for 12,000 lb trailer axle applications using 12.25" × 5" drum brake assemblies. It is a left-hand (street-side) backing plate commonly used on heavy-duty hydraulic brake systems and is supplied as a complete bolt-on assembly.
Features
- Hydraulic drum brake backing plate
- 12.25" diameter × 5" wide brake shoe configuration
- 7-bolt mounting pattern
- Left-hand (street-side) orientation
- Designed for 12K axle applications
- Complete backing plate assembly
Specifications
| Brake Type | Hydraulic drum brake backing plate |
|---|---|
| Shoe Size | 12.25" × 5" |
| Mounting Pattern | 7-bolt |
| Side | Left (street side) |
| Axle Rating | Typically used on 12,000 lb axles |
| Replacement Reference | Can replace Dexter 23-406 and 23-408 |
Verify axle manufacturer, brake size, mounting pattern, and left-hand orientation before installation. Refer to manufacturer documentation for exact compatibility.