At a Glance
- >Fits 6K–8K axle oil bath hubs
- >2-7/8"-12 thread specification
- >Includes O-ring and rubber plug
- >Direct replacement oil cap kit
- Brand: Dexter
- SKU: 21-35-KIT
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. |

Single oil cap kit for 6K–8K axles with 2-7/8"-12 threads, including O-ring and rubber plug for proper sealing and oil retention in oil bath hub systems.
Oil caps seal oil bath hubs and maintain lubrication. Proper thread size and intact sealing components prevent leaks and ensure consistent bearing protection.
| Part Number | 21-35-KIT |
| Thread Size | 2-7/8" OD |
| Thread Count | 12 Thread |
| Axle Rating | 6K–8K |
| Type | Oil Bath Cap Kit |
| Part Number | Quantity | Description |
|---|---|---|
| 21-35 | 1 | Oil Cap (2-7/8"-12) |
| 010-045-00 | 1 | O-Ring for Oil Cap |
| 046-032-00 | 1 | Rubber Insert Plug |