4.0" Billet Aluminum Oil Bath Cap 4"-12 Thread for 10K–15K Axles
Part Number: 21-36 Billet-KIT
Billet aluminum oil bath cap kit designed for heavy-duty trailer axles with 4"-12 threads, including O-ring and plug for secure sealing and reliable oil retention.
R&P Knowledge Hub
Oil bath caps maintain lubrication inside the hub. Correct sizing, thread engagement, and sealing components are critical for preventing leaks and protecting bearings under heavy loads.
Features
- Billet aluminum construction for durability
- 4"-12 thread oil bath cap design
- Fits heavy-duty Dexter two-piece hubs
- Includes O-ring and center plug
Specifications
| Part Number | 21-36 Billet-KIT |
| Thread Size | 4" OD |
| Thread Count | 12 Thread |
| Material | Billet Aluminum |
| Axle Ratings | 10K HD, 12K, 15K, Pre-09 10K GD |
| Compatibility | Dexter 2-Piece Hubs |
Included Components
| Part Number | Quantity | Description |
|---|---|---|
| 21-36 Billet | 1 | 4" Billet Aluminum Oil Bath Cap (4"-12) |
| 010-050-00 | 1 | O-Ring (3.734" I.D., 0.139" Thickness) |
| 046-032-00 | 1 | Center Oil Plug |