National 30204 Wheel Bearing and Race Set

OE-Style Taper Bearing Assembly

The National 30204 wheel bearing and race set is a taper bearing assembly built with premium materials and engineered to meet OE specifications. It is sized for ISO metric applications and is used in driveline and axle service where precise bearing geometry matters.

• Part number: 30204
• Part description: taper bearing assembly
• Design: ISO Metric
• Type: TS
• Series: 30200
• Bore: 20.0000 mm (0.7874 in)
• Outside diameter: 47.0000 mm (1.8504 in)
• Width: 15.2500 mm (0.6004 in)
• Cone length: 14.0000 mm (0.5512 in)
• Cup length: 12.0000 mm (0.4724 in)

Detailed Application Overview

National 30204 is a tapered roller bearing assembly used in wheel bearing and race service where controlled load handling and accurate fit are required. The metric dimensions, including a 20 mm bore and 47 mm outside diameter, make this bearing a direct-match service part for a range of older import and compact truck applications. It is a practical replacement choice for front outer and rear bearing positions on select Subaru, Mazda B2000, Mazda B2200, Ford Courier, Nissan 510, and Nissan 200SX applications. This part cross-references SKF BR30204 and Beck/Arnley 051-2444 for the same application.

Common Problems This Part Can Address

• Wheel bearing noise such as humming or growling
• Excessive wheel end play or looseness
• Rough rotation caused by worn bearing surfaces
• Service replacement for damaged cone and cup components
• Restoring proper bearing preload and wheel support

Installation Notes and Tips

Verify the bearing dimensions, seal surfaces, and hub or spindle condition before installation. Clean and inspect the race seating area, then pack and set the bearing according to the vehicle service procedure. Confirm the correct position before ordering: Fits 1976-1987 Subaru Standard, Rear Outer; Fits 1979-1984 Mazda B2000, Front Outer; Fits 1982-1984 Mazda B2200, Front Outer; Fits 1972-1982 Ford Courier, Front Outer; Fits 1978-1981 Nissan 510, Rear; Fits 1978-1981 Nissan 510, Front; Fits 1980 Nissan 200SX, Front, with Nissan FS5W63A Transmission; Fits 1980 Nissan 200SX, Rear, with Nissan FS5W63A Transmission; Fits 1977-1979 Nissan 200SX, Rear; Fits 1977-1979 Nissan 200SX, Front.

Quality Assurance

National manufactures this taper bearing assembly to OE specifications using premium materials for consistent service fit and dimensional accuracy. The National 30204 is built for wheel bearing and race applications where dependable bearing geometry is required.