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NationalPart #: A-20
National A-20 Wheel Bearing and Race Set - Rear
⚙️ 123 vehicles fit this part
Select your vehicle to confirm fitment
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🚗Fitment: Ford, Lincoln, and Mercury, Bronco, E-150 Econoline, E-150 Econoline Club Wagon, F-150, E-100 Econoline, E-100 Econoline Club Wagon, F-100, LTD, LTD II, Ranchero, Thunderbird, Mark V, Cougar, Grand Marquis, Marquis, Custom 500, Continental, Elite, Gran Torino, Torino, Mark IV, Montego, Country Sedan, Country Squire, E-200 Econoline, Galaxie 500, Ranch Wagon, Colony Park, and Monterey
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Not what you need? Click here for all Wheel Bearing and Race Set options
National A-20 Wheel Bearing and Race Set Overview
The National A-20 wheel bearing and race set is engineered for reliable driveline performance in select Ford, Lincoln, and Mercury vehicles. Designed as a taper bearing assembly, this set ensures precise fitment and durability for models such as the Ford Bronco, F-150, and Lincoln Continental.
- Bore diameter: 1.5625 inches (39.688 mm)
- Cone length: 0.8700 inches (22.098 mm)
- Cone radius: 0.0900 inches (2.286 mm)
- Cup length: 0.6010 inches (15.265 mm)
- Cup radius: 0.0500 inches (1.270 mm)
- Outside diameter: 3.1483 inches (79.967 mm)
- Width: 0.7636 inches (19.395 mm)
- Standout: 0.1626 inches (4.130 mm)
- Type: Ts taper bearing assembly
Detailed Product Description
The National A-20 wheel bearing and race set is a precision-engineered taper bearing assembly designed to meet the specific requirements of various Ford, Lincoln, and Mercury vehicles. With an outside diameter of approximately 3.15 inches and a bore size of 1.5625 inches, this set provides a secure and accurate fit for wheel hubs. The cone and cup components feature carefully measured lengths and radii to ensure smooth rotation and reduced wear under typical driving conditions. This part is compatible with models including the Ford Bronco, F-100, F-150, Lincoln Continental, Mercury Cougar, and several Econoline variants, making it a versatile choice for driveline maintenance and repair.
Common Applications and Problem Resolution
- Replacement for worn or damaged wheel bearings in Ford Bronco and F-150 models
- Restores proper wheel hub alignment and reduces vibration in Lincoln Continental and Mercury Cougar vehicles
- Addresses wheel noise and rough rotation issues in Econoline vans such as the E-100 and E-150
- Prevents premature bearing failure caused by improper fit or wear
- Supports driveline stability and safety in older Ford and Mercury vehicles
Installation Notes and Tips
- Ensure the wheel hub and spindle surfaces are clean and free of debris before installation
- Use proper tools to press the bearing and race into place without damaging the components
- Apply appropriate lubrication as specified by the vehicle manufacturer
- Verify correct bearing preload and torque settings during assembly
- Consult vehicle service manuals for model-specific installation procedures
Quality Assurance and Warranty
National wheel bearing and race sets are manufactured to meet industry standards for durability and performance. The A-20 part number undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty terms may vary, National typically offers coverage against manufacturing defects to provide confidence in the product's reliability for Ford, Lincoln, and Mercury driveline applications.
| Brand | National |
| Part Number | A-20 |
| Bore (Inch) | 1.5625 |
| Bore (mm) | 39.6880 |
| Cone Length (Inch) | 0.8700 |
| Cone Length (MM) | 22.0980 |
| Cone Radius (Inch) | 0.0900 |
| Cone Radius (MM) | 2.2860 |
| Cup Length (Inch) | 0.6010 |
| Cup Length (MM) | 15.2650 |
| Cup Radius (Inch) | 0.0500 |
| Cup Radius (MM) | 1.2700 |
| Outside Diameter (Inch) | 3.1483 |
| Outside Diameter (mm) | 79.9670 |
| Part Description | Taper Bearing Assembly |
| Series | A20 |
| Standout (Inch) | 0.1626 |
| Standout (MM) | 4.1300 |
| Type | TS |
| Width (Inch) | 0.7636 |
| Width (mm) | 19.3950 |
This part fits 123 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1986 | Ford | Bronco | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1986 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1986 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1986 | Ford | F-150 | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1985 | Ford | Bronco | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1985 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1985 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1985 | Ford | F-150 | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1984 | Ford | Bronco | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1984 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1984 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1984 | Ford | F-150 | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1983 | Ford | Bronco | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1983 | Ford | E-100 Econoline | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1983 | Ford | E-100 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1983 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1983 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1983 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 3,750 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1983 | Ford | F-150 | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1982 | Ford | Bronco | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1982 | Ford | E-100 Econoline | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1982 | Ford | E-100 Econoline Club Wagon | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1982 | Ford | E-150 Econoline | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1982 | Ford | E-150 Econoline Club Wagon | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1982 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 3,750 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1982 | Ford | F-150 | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1981 | Ford | Bronco | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1981 | Ford | E-100 Econoline | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1981 | Ford | E-100 Econoline Club Wagon | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1981 | Ford | E-150 Econoline | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1981 | Ford | E-150 Econoline Club Wagon | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1981 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 3,750 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1981 | Ford | F-150 | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1980 | Ford | Bronco | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1980 | Ford | E-100 Econoline | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1980 | Ford | E-100 Econoline Club Wagon | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1980 | Ford | E-150 Econoline | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1980 | Ford | E-150 Econoline Club Wagon | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1980 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 3,750 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1980 | Ford | F-150 | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1979 | Ford | Bronco | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1979 | Ford | E-100 Econoline | Rear | with 8.75 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | E-100 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | E-100 Econoline | Rear | with 8.375 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | E-100 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | F-150 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | LTD | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1979 | Ford | Thunderbird | Rear | with Heavy Duty Axle; Taper Bearing Set Includes Cup and Cone |
| 1979 | Mercury | Cougar | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1979 | Mercury | Grand Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1979 | Mercury | Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | Bronco | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1978 | Ford | E-100 Econoline | Rear | with 8.75 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | E-100 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | E-100 Econoline | Rear | with 8.375 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | E-100 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | F-150 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | LTD | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1978 | Ford | Thunderbird | Rear | with Heavy Duty Axle; Taper Bearing Set Includes Cup and Cone |
| 1978 | Mercury | Cougar | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1978 | Mercury | Grand Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1978 | Mercury | Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | E-100 Econoline | Rear | with 8.75 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | E-100 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | E-100 Econoline | Rear | with 8.375 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | E-100 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | F-150 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | LTD | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1977 | Ford | Thunderbird | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1977 | Lincoln | Continental | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1977 | Mercury | Cougar | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1977 | Mercury | Grand Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1977 | Mercury | Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | E-100 Econoline | Rear | with 8.75 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | E-100 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | E-100 Econoline | Rear | with 8.375 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | E-100 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | F-150 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | LTD | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1976 | Ford | Thunderbird | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1976 | Lincoln | Continental | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1976 | Mercury | Cougar | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1976 | Mercury | Grand Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1976 | Mercury | Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1976 | Mercury | Montego | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | E-100 Econoline | Rear | with 8.75 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | E-100 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | E-100 Econoline | Rear | with 8.375 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | E-100 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | E-150 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | E-150 Econoline Club Wagon | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | F-150 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | LTD | Rear | with 9 (in) Ring Gear; with Heavy Duty Axle; Taper Bearing Set Includes Cup and Cone |
| 1975 | Ford | Thunderbird | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1975 | Lincoln | Continental | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1975 | Mercury | Cougar | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1975 | Mercury | Grand Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1975 | Mercury | Marquis | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1975 | Mercury | Montego | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1974 | Ford | E-100 Econoline | Rear | with 8.75 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1974 | Ford | E-100 Econoline | Rear | with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1974 | Ford | E-100 Econoline | Rear | with 8.375 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1974 | Ford | F-100 | Rear | with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1974 | Ford | LTD | Rear | with 9 (in) Ring Gear; with Heavy Duty Axle; Taper Bearing Set Includes Cup and Cone |
| 1974 | Ford | Thunderbird | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1974 | Lincoln | Continental | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1974 | Mercury | Colony Park | Rear | with Drum Brakes; with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1974 | Mercury | Cougar | Rear | with Drum Brakes; with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
| 1974 | Mercury | Marquis | Rear | with Drum Brakes; with 9 (in) Ring Gear; Taper Bearing Set Includes Cup and Cone |
| 1974 | Mercury | Montego | Rear | with Drum Brakes; with 9 (in) Ring Gear; with 2,900 (lb) Axle(s); Taper Bearing Set Includes Cup and Cone |
* 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:
A-20A20BB20SBR20BS226097BT20SD4AZ-1225AD5AZ-1225AD5AZ-1225BE0TZ-1225CFS20ANO20SETRW905RS20S600SET20U399A-U365LWB1278
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.