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National 370024A Wheel Seal - Rear
National 370024A Wheel Seal Overview
National 370024A is an oil bath wheel seal built for driveline and axle sealing applications where consistent lubricant retention matters. It uses nitrile material and precise dimensions to help maintain a secure seal at the housing bore and shaft interface.
Compatible With wheel seal applications that require a 5.501 in housing bore, 5.515 in outside diameter, and 3.875 in shaft diameter. This National wheel seal is a practical choice for service work on vehicles such as Ford F-81Z1S175EA and related axle seal applications.
Key Features
- Part number: 370024A
- Oil bath seal design for axle and wheel-end sealing
- Nitrile sealing material
- Outside diameter: 5.515 in (140.080 mm)
- Housing bore: 5.501 in (139.730 mm)
- Shaft diameter: 3.875 in (98.430 mm)
- Width: 0.875 in (22.230 mm)
- Installation tool reference: RD280
- National Series 370000 wheel seal
Detailed Description
National 370024A is engineered as a wheel seal for oil bath applications in the driveline and axle sealing category. The seal dimensions are specified for a 5.501 in housing bore and 3.875 in shaft diameter, helping support a proper fit in the intended assembly. National has supplied sealing products for decades, and this part reflects that focus on dimensional accuracy and material selection for modern vehicle service.
This part cross-references Timken 11S38750 and SKF 38747 for the same application. For technicians searching by vehicle terms, National 370024A is relevant to Ford axle seal service and other wheel seal replacement jobs where the listed dimensions match the original component.
Common Problems This Seal Addresses
- Gear oil leakage at the wheel-end or axle housing
- Contamination entering the sealed area
- Seal wear from age, heat, and lubricant exposure
- Loss of sealing performance after axle service
- Noise or damage caused by lubricant loss in the assembly
Installation Notes and Tips
Verify housing bore, shaft diameter, outside diameter, and width before installation. Use the specified installation tool RD280 to help seat the seal evenly and avoid distortion during assembly. Clean the bore and shaft surfaces thoroughly, and inspect the mating surfaces for wear or scoring before installing the new seal.
For fitment-based searches, this part is commonly referenced in Ford wheel seal and axle seal replacement work, including Ford F-81Z1S175EA applications. Confirm all dimensions against the original part before service.
Quality Assurance
National has a long history in sealing solutions and continues to develop parts for current vehicle service needs. Part number 370024A is built to the listed dimensional specifications and material requirements for oil bath seal applications.
| Brand | National |
|---|---|
| Part Number | 370024A |
| Width | 0.875 |
| Width | 22.230 |
| Outside Diameter | 140.080 |
| Outside Diameter | 5.515 |
| Housing Bore | 139.730 |
| Housing Bore | 5.501 |
| Housing Bore (Inch) | 5.501 |
| Housing Bore (MM) | 139.730 |
| Installation Tool | Rd280 |
| Material | Nitrile |
| Outside Diameter (Inch) | 5.515 |
| Outside Diameter (mm) | 140.080 |
| Part Description | Oil bath seal |
| Series | 370000 |
| Shaft (Inch) | 3.875 |
| Shaft (MM) | 98.430 |
| Shaft Diameter | 3.875 |
| Shaft Diameter | 98.430 |
| Type | 11 |
| Unit of Dimension | Inch |
| Width (Inch) | 0.875 |
| Width (mm) | 22.230 |
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.