/live/media/NS/NS_340356_Fro.jpg)
OE Quality
60-Day Returns
National 340356 Wheel Seal - Rear or Rear Outer
National 340356 Wheel Seal Overview
National 340356 is a wheel seal built for driveline and axle sealing applications where consistent oil control matters. It uses nitrile material and a compact 0.218-inch width to help maintain a secure seal at the shaft and housing bore.
National has supplied sealing solutions for more than 75 years, and this 340356 seal reflects that focus on dimensional accuracy and modern vehicle service needs. It is a practical choice for wheel seal replacement on compatible axle and hub assemblies, including applications searched as Ford F-150 wheel seal and Chevrolet Silverado wheel seal.
Key Features
- Part number: 340356
- Wheel seal / oil seal design for driveline and axle sealing systems
- Nitrile sealing material for common automotive oil-seal applications
- Inside diameter: 1.250 in. / 31.750 mm
- Outside diameter: 1.696 in. / 43.080 mm
- Housing bore: 1.686 in. / 42.820 mm
- Shaft size: 1.250 in. / 31.750 mm
- Width: 0.218 in. / 5.540 mm
- Series: 340000, Type 34
Detailed Description
National 340356 is an oil seal specified as a wheel seal in the driveline and axles category. Its nitrile construction and precise inch-based dimensions support a proper fit at the shaft and housing bore, helping maintain sealing performance in service. For technicians searching for a National 340356 replacement, this seal provides the dimensional details needed to match the application before installation. It is commonly referenced in wheel seal service for vehicles such as Ford F-150 and Chevrolet Silverado when the axle or hub specification matches these measurements.
This part cross-references Dorman - HELP 14015 and Gates 12334 for the same application.
What It Helps Address
- Gear oil seepage at the wheel end
- Contamination entering the hub or axle seal area
- Seal wear from age, heat, or mileage
- Loss of sealing integrity around the shaft or housing bore
- Noise or service issues related to lubricant leakage in axle assemblies
Installation Notes and Tips
Verify shaft diameter, housing bore, and seal width against the original component before installation. Clean the bore and sealing surface thoroughly, and inspect the shaft for grooves or scoring that could affect sealing. Confirm the application by comparing the National 340356 dimensions with the vehicle service information for the specific axle or hub assembly. For fitment-based searches, confirm the exact Ford F-150 or Chevrolet Silverado configuration before ordering.
Quality Assurance
National has a long history in sealing technology and continues to develop sealing solutions for current vehicle service requirements. The 340356 seal is produced to support dimensional consistency and dependable sealing performance in automotive driveline applications.
| Brand | National |
|---|---|
| Part Number | 340356 |
| Inside Diameter | 1.250 |
| Inside Diameter | 31.750 |
| Outside Diameter | 1.696 |
| Outside Diameter | 43.080 |
| Housing Bore (Inch) | 1.686 |
| Housing Bore (MM) | 42.820 |
| Material | Nitrile |
| Outside Diameter (Inch) | 1.696 |
| Outside Diameter (mm) | 43.080 |
| Part Description | Oil seal |
| Series | 340000 |
| Shaft (Inch) | 1.250 |
| Shaft (MM) | 31.750 |
| Type | 34 |
| Unit of Dimension | Inch |
| Width (Inch) | 0.218 |
| Width (mm) | 5.540 |
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.