National KB-11786-Y Wheel Bearing and Race Set - Rear Outer

National KB-11786-Y Taper Bearing Set

National KB-11786-Y is a taper bearing set built with premium-grade steel and crowned raceways and rollers for even load distribution. It is a direct-fit wheel bearing and race set for rear outer service on select Chevrolet P30 and GMC P3500 applications.

Key Features

• Premium-grade steel construction for bearing durability
• Crowned raceways and rollers help distribute load evenly
• Taper bearing cone: 387
• Taper bearing cup: 382
• Cone bore: 2.2500 in. (57.1500 mm)
• Cup bore: 3.8750 in. (98.4250 mm)
• Width: 0.8268 in. (21.0000 mm)
• Part number: KB-11786-Y

Detailed Description

This National wheel bearing and race set is engineered for rear outer use on 1975-1981 Chevrolet P30 and 1979-1981 GMC P3500 models. The tapered design supports controlled rolling contact, while the crowned raceways and rollers help promote even load distribution across the bearing surfaces. For buyers searching for a Chevrolet P30 rear outer wheel bearing set or a GMC P3500 rear outer taper bearing set, KB-11786-Y provides the key dimensions and bearing references needed for a proper match. This part cross-references SKF (e.g., KB11786-Y) for the same application.

What It Helps Address

• Wheel end looseness caused by worn bearing surfaces
• Noise from a deteriorated rear outer bearing
• Uneven wheel rotation from bearing wear
• Excess play at the wheel hub assembly
• Service replacement for tapered bearing and race wear

Installation Notes and Tips

Verify cone and cup dimensions, bearing numbers 387 and 382, and rear outer position before installation. Clean the hub and spindle thoroughly, inspect related sealing surfaces, and pack the bearing according to standard service procedures. Confirm fitment for 1975-1981 Chevrolet P30 and 1979-1981 GMC P3500 rear outer applications before assembly.

Quality Assurance

National manufactures this taper bearing set with premium-grade steel and crowned race geometry to support consistent load handling in wheel-end service.