Four - Billet Aluminum Oil Bath Trailer Caps 2.875"-12 Thread with Wrench
Four-piece billet aluminum oil bath cap kit with one included billet wrench. Designed for 2.875"-12 threaded hubs commonly used on compatible Lippert and Dexter 6K, 7K, 8K, and pre-89 9K axle applications where measurements match. Fits Lippert and Dexter.
Key Measurements & Specs
| Specification | Detail |
|---|---|
| Part Number / SKU | 21-35-BILLET-WRENCH-KITX4 |
| Selling Brand | R&P Carriages curated kit |
| Product Type | Billet aluminum oil bath cap kit with wrench |
| Thread Size | 2.875"-12 |
| Material | Billet aluminum |
| Quantity Included | 4 oil bath caps and 1 billet wrench |
Fitment / Application
| Category | Details |
|---|---|
| System | Oil bath trailer hub assemblies |
| Application Reference | Lippert and Dexter axle applications where the existing hub uses a 2.875"-12 threaded oil bath cap |
| Axle Ratings | 6000#, 7000#, 8000#, and pre-89 9K applications |
| Drum Reference | 8-285 |
| Fitment Method | Verify existing cap thread size, hub style, and oil bath cap dimensions before ordering |
Top Features
| Feature | Buyer Benefit |
|---|---|
| Billet Aluminum Construction | Durable replacement option for compatible oil bath hub setups |
| 2.875"-12 Thread | Matches compatible threaded oil bath hub applications |
| Four-Cap Kit | Useful for servicing multiple hubs or keeping matching caps together |
| Included Wrench | Helps with installation and removal of compatible billet caps |
Overview
This kit includes four billet aluminum oil bath caps and one billet wrench for compatible trailer hub applications using a 2.875"-12 threaded oil bath cap. It is intended for Lippert and Dexter application references where the existing hub, thread size, and cap dimensions match before installation.
R&P Service Insight
Oil bath caps help seal the hub and retain lubrication in oil bath bearing systems. Correct thread fit and seal condition are critical for preventing oil leaks and protecting hub and bearing components.
- Thread Check: Confirm the existing cap uses a 2.875"-12 thread before ordering.
- Hub Match: Compare the current cap, hub opening, and application reference before installation.
- Leak Prevention: Inspect sealing surfaces and related components during service.
R&P Knowledge Hub
Compatibility: Designed for compatible Lippert and Dexter oil bath hub applications where the original cap thread is 2.875"-12.
Vehicle / System Fit: Commonly used on trailer oil bath hub systems in 6000#, 7000#, 8000#, and pre-89 9K application references.
Installation Notes: Verify thread size, hub style, cap depth, and sealing surfaces before installing. Do not force threads if resistance or mismatch is present.
Performance Insight: A properly matched oil bath cap helps retain lubrication and protect the bearing system from contamination and oil loss.
Brand & Fitment Note
Selling Brand: R&P Carriages curated kit
Application Reference: Lippert and Dexter names are used as compatibility references only for applications where the measurements and hub specifications match.
What This Means: This listing is for a billet aluminum oil bath cap kit with wrench, not a guaranteed OEM-branded item unless specifically stated and verified.
Before Ordering: Verify the cap thread size, hub style, axle application, drum reference, sealing components, and included quantities before installation.
R&P Repair Insight
Oil bath hub cap replacement should be treated as a fitment-sensitive repair. Matching the thread size is only one part of the check; the hub style, seal condition, and cap seating surface also matter.
- Confirm Existing Cap: Match the old cap thread and hub application before replacing.
- Inspect for Leaks: Check for oil residue around the cap, plug, and hub face before and after installation.
- Service Carefully: Clean the mating area and verify the cap seats correctly without cross-threading.
Features
Billet Aluminum Oil Bath Caps
Four billet aluminum caps included for compatible oil bath hub applications.
2.875"-12 Thread Specification
Designed for hubs that use a 2.875"-12 threaded oil bath cap.
Lippert & Dexter Application Reference
Intended for compatible Lippert and Dexter axle applications where measurements match.
Includes Billet Wrench
Kit includes one billet wrench for installation and removal of compatible billet caps.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 21-35-BILLET-WRENCH-KITX4 |
| Thread Size | 2.875" OD |
| Thread Count | 12 Thread |
| Material | Billet Aluminum |
| Axle Ratings | 6000#, 7000#, 8000#, Pre-89 9K |
| Fits | Lippert & Dexter application references where measurements match |
| Drum Reference | 8-285 |
Included Components
| Part Number | Quantity | Description |
|---|---|---|
| 21-35 Billet-Kit | 4 | Billet Aluminum Oil Bath Cap, 2.875"-12 |
| Billet-Wrench-2.25 | 1 | Billet Aluminum Wrench for compatible billet caps |
