Match the part number, measurements and connection points that apply to your trailer.
| Part Number | Match the number stamped on the original bearing or seal. |
|---|---|
| Dimensions | Measure the mating surfaces when a number is unavailable. |
| Hub / Axle | Use capacity as context, not as the only fitment check. |
This listing is for a pair of backing plate brake flanges with a 2.53" pilot hole, 4-hole mounting pattern, and X-type configuration for compatible 7.2K and 8K trailer axle brake applications.
These X-type backing plate brake flanges are used as the mounting interface for compatible trailer brake backing plates. The flange dimensions, pilot hole, bolt hole count, and axle rating range should be matched carefully against the axle and brake assembly being serviced before welding or installation.
Brake flanges are small parts with a major role: they determine whether the backing plate mounts square, centered, and secure to the axle tube. Confirming the flange pattern before ordering helps prevent brake alignment problems during service.
Compatibility: Designed for compatible trailer brake applications using a 4-hole X-type brake flange with a 2.53" pilot hole.
Vehicle / System Fit: Trailer axle brake mounting applications commonly associated with 7.2K and 8K axle setups.
Installation Notes: Brake flanges typically require proper positioning, alignment, and welding by a qualified installer or axle service professional.
Performance Insight: Proper flange alignment is critical because the brake backing plate must sit square to the drum and spindle centerline.
Before replacing or adding brake flanges, compare the original flange and brake assembly dimensions carefully. A flange can appear close visually while still having the wrong pilot hole, bolt spacing, thickness, or orientation for the brake backing plate.
Includes two brake flanges, making it a practical option for paired brake service or axle repair work.
X-type brake flange design for compatible trailer brake backing plate applications.
Center pilot hole is listed at 2.53" for matching against the axle and brake mounting setup.
Intended for compatible 7,200 lb. and 8,000 lb. axle brake flange applications where the specifications match.
| Specification | Detail |
|---|---|
| Part Number | 004-055-00-X2 |
| Base Flange Reference | 004-055-00 (Single) |
| Product Type | Backing Plate Brake Flange |
| Quantity Included | Pair / 2 flanges |
| Flange Style | X Type |
| Pilot / Center Hole | 2.53" |
| Overall Shape / Size | 4.62" square |
| Mounting Holes | 4 holes |
| Mounting Hole Diameter | 0.51" each |
| Thickness | 0.425" |
| Application | For compatible 7.2K and 8K axle brake applications |
| Category | Details |
|---|---|
| System | Trailer axle brake mounting flange |
| Primary Fit | Compatible 7.2K / 8K axle brake flange applications |
| Mounting Pattern | 4-hole X-type flange pattern |
| Buyer Check | Verify pilot hole, flange shape, hole count, hole diameter, thickness, brake backing plate pattern, and axle application before ordering or installation. |
| Quantity | Item |
|---|---|
| 2 | 004-055-00 X-Type Backing Plate Brake Flanges |
| Not Included | Brake backing plates, drums, hubs, bearings, seals, axle tube, welding materials, and installation hardware unless separately shown or stated. |
