National 15103S Wheel Bearing - Front Outer

National 15103S Wheel Bearing Overview

The National 15103S wheel bearing cone is engineered for reliable driveline performance in select Chevrolet and GMC trucks and vans. Designed to meet precise specifications, this taper bearing cone ensures proper fit and function for your vehicle's wheel assembly.

• Part Number: 15103S
• Brand: National
• Category: Wheel Bearing Cone for driveline and axles
• Cone Bore Diameter: 1.0300 inches (26.1620 mm)
• Cone Length: 0.7850 inches (19.9390 mm)
• Cone Radius: 0.0310 inches (0.7870 mm)
• Compatible with multiple Chevrolet and GMC truck and van models

Technical Specifications and Design Details

The National 15103S is a taper bearing cone designed with a cone bore diameter of 1.0300 inches (26.1620 mm), providing a precise fit for the wheel hub assembly. Its cone length measures 0.7850 inches (19.9390 mm), ensuring proper seating and load distribution. The cone radius of 0.0310 inches (0.7870 mm) contributes to smooth rotation and reduced friction within the bearing assembly. These dimensions are critical for maintaining the integrity and performance of the wheel bearing system in heavy-duty applications.

Compatible Vehicles and Applications

This wheel bearing cone is compatible with a range of Chevrolet and GMC models, including C20, C20 Suburban, C30, C1500, C1500 Suburban, C2500, C2500 Suburban, C3500, Express 2500, Express 3500, G30, P20, P30, P2500, P3500, R20, R20 Suburban, R30, R2500, R2500 Suburban, R3500, Savana 2500, and Savana 3500. The National 15103S is designed to meet the specific requirements of these vehicles’ driveline and axle systems, ensuring compatibility and reliable operation.

Common Issues Addressed by the National 15103S Wheel Bearing

• Eliminates wheel bearing noise caused by worn or damaged cones
• Prevents excessive wheel play and vibration
• Restores proper wheel hub alignment and rotation
• Reduces premature bearing wear due to improper fit
• Supports safe and stable vehicle handling under load

Installation Notes and Tips

When installing the National 15103S wheel bearing cone, ensure the bearing surfaces are clean and free of debris. Proper lubrication is essential to prevent premature wear and overheating. Use the correct tools to avoid damaging the cone bore or radius during installation. Verify fitment with the vehicle’s service manual to confirm compatibility with your specific Chevrolet or GMC model.

Quality Assurance and Warranty Information

National wheel bearings are manufactured to meet industry standards for durability and performance. The 15103S part undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product’s reliability.