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National 380023A Wheel Seal - Rear Inner
National 380023A Wheel Seal Overview
National 380023A is an oil bath wheel seal built for driveline and axle sealing applications where consistent retention and contamination control matter. It uses PTFE sealing material and is sized for a 3.875 inch shaft diameter, with a 5.703 inch outside diameter and 5.690 inch housing bore.
For buyers searching for a wheel seal for Ford, International, or similar heavy-duty axle applications, this National 380023A seal provides the dimensional fit needed for service work and rebuilds. It is part of National’s 380000 series and is referenced across multiple OE and aftermarket part numbers.
Key Features
- Wheel seal / oil bath seal for driveline and axle sealing service
- PTFE sealing material for controlled sealing performance
- Outside diameter: 5.703 in. (144.930 mm)
- Housing bore: 5.690 in. (144.530 mm)
- Shaft diameter: 3.875 in. (98.430 mm)
- Width: 0.770 in. (19.560 mm)
- Series: 380000
- Installation tool reference: RD309
Detailed Description
National 380023A is engineered as an oil bath seal for axle and wheel-end sealing applications that require accurate dimensions and durable sealing material. The listed measurements help confirm housing bore, shaft diameter, and overall seal width before installation, which is important when servicing heavy-duty driveline and axle assemblies. This part is commonly searched as a wheel seal for Ford F-Series and International truck applications, and it also appears in cross-reference catalogs for related axle service parts. This part cross-references Monroe Shocks & Struts (e.g., 40210) for the same application.
What This Part Helps Address
- Gear oil leakage at the wheel end or axle seal area
- Contamination entering the oil bath sealing zone
- Wear-related sealing loss from age or mileage
- Service replacement needs during axle or hub rebuilds
- Dimensional mismatch when replacing an existing wheel seal
Installation Notes and Tips
Verify the housing bore, shaft diameter, and seal width against the removed part before installation. Use the specified installation tool RD309 when required for proper seating and to reduce the risk of seal damage. Clean the bore and shaft surface thoroughly, and inspect for scoring, corrosion, or wear that could affect sealing performance. For fitment-based searches, this National 380023A wheel seal is commonly associated with Ford and International axle service applications.
Quality Assurance
National has supplied sealing products for more than 75 years and continues to develop sealing solutions for modern vehicle service needs. The 380023A is part of that sealing-focused product line and is built to meet dimensional and material requirements for axle and wheel-end repair work.
| Brand | National |
|---|---|
| Part Number | 380023A |
| Width | 0.770 |
| Width | 19.560 |
| Outside Diameter | 144.930 |
| Outside Diameter | 5.703 |
| Housing Bore | 144.530 |
| Housing Bore | 5.690 |
| Housing Bore (Inch) | 5.690 |
| Housing Bore (MM) | 144.530 |
| Installation Tool | Rd309 |
| Material | Ptfe |
| Outside Diameter (Inch) | 5.703 |
| Outside Diameter (mm) | 144.930 |
| Part Description | Oil bath seal |
| Series | 380000 |
| Shaft (Inch) | 3.875 |
| Shaft (MM) | 98.430 |
| Shaft Diameter | 3.875 |
| Shaft Diameter | 98.430 |
| Type | 10 |
| Unit of Dimension | Inch |
| Width (Inch) | 0.770 |
| Width (mm) | 19.560 |
This part fits 0 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.