National Oil Seal 510123 Wheel Bearing - and Hub Assembly

The National Oil Seal 510123 is a precision-engineered wheel bearing and hub assembly designed as a direct-fit replacement for worn or failed OEM units. Manufactured under the National brand — a trusted name in bearings and seals under the Timken umbrella — this hub assembly delivers reliable performance and long service life in demanding automotive applications.

This unitized hub assembly integrates the wheel bearing, hub flange, and ABS sensor ring into a single pre-assembled unit, simplifying the replacement process and ensuring proper bearing preload right out of the box. The sealed design protects internal bearing components from contamination, moisture, and road debris.

Key Features:

• Pre-assembled, unitized wheel bearing and hub assembly for straightforward installation
• Integrated ABS tone ring for compatibility with anti-lock braking systems
• Factory-sealed bearing — no repacking or adjustment required
• Precision tolerances for smooth, low-friction wheel rotation
• High-strength hub flange machined to OEM specifications
• Corrosion-resistant construction for extended service life
• Manufactured to meet or exceed OEM quality standards

The National 510123 hub assembly is a bolt-on replacement that restores proper wheel end function, reduces vibration, and maintains accurate ABS sensor signals. It is packaged ready to install, making it a preferred choice for professional technicians and experienced DIY mechanics alike.