National KD-12051-Z Wheel Bearing and Race Set - Rear Inner or Rear Outer

Name: National KD-12051-Z Wheel Bearing and Race Set - Rear Inner or Rear Outer
Brand: National
SKU: BCZK-KD-12051-Z
Price: 85.69 USD
Availability: InStock

Rear Inner

⚙️ 106 vehicles fit this part

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✅OE Direct Replacement — Bolt-on fit, no modifications needed

🚗Fitment: Workhorse, Chevrolet, and GMC, P30, C3500, K3500, P3500, P35, P30 Van, P35/P3500 Van, C30 Pickup, G30 Van, K30 Pickup, C35/C3500 Pickup, G35/G3500 Van, K35/K3500 Pickup, P30 Series, PM251, 250, PM250, PM252, PM253, 250-22, and PM250-24

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Overview of National KD-12051-Z Wheel Bearing and Race Set

The National KD-12051-Z wheel bearing and race set is engineered for reliable driveline performance in Chevrolet and GMC heavy-duty trucks. Designed specifically for models like the Chevrolet C3500, K3500, P30, and P3500, this taper bearing set ensures precise fitment and durability.

Includes taper bearing cone (395cs) and cup (394cs)
Cone bore diameter: 2.6250 inches (66.675 mm)
Cone length: 0.9230 inches (23.444 mm)
Cup bore diameter: 4.4680 inches (113.487 mm)
Cup length: 0.7411 inches (18.824 mm)
Standout measurement: 0.6900 inches (17.526 mm)
Overall width: 1.4311 inches (36.350 mm)

Technical Specifications and Design Details

This National wheel bearing and race set features a taper bearing cone and cup designed to meet the exacting standards required for heavy-duty Chevrolet and GMC trucks. The cone bore of 2.6250 inches and cup bore of 4.4680 inches provide a precise fit for axle shafts, while the cone and cup lengths ensure proper seating and load distribution. The standout dimension of 0.6900 inches allows for correct bearing preload adjustment, critical for maintaining wheel alignment and reducing wear. The cone radius of 0.1400 inches and cup radius of 0.0470 inches contribute to smooth rotation and durability under heavy loads.

Compatible Vehicles and Applications

This wheel bearing and race set is compatible with the following vehicles:

Chevrolet C3500
Chevrolet K3500
GMC P30
GMC P3500

It is designed for use in driveline and axle assemblies where reliable wheel bearing performance is essential for vehicle safety and handling.

Common Issues Addressed by This Bearing Set

Eliminates wheel bearing noise caused by worn or damaged bearings
Prevents excessive wheel play and vibration
Reduces risk of axle shaft damage due to improper bearing fit
Improves wheel alignment and handling stability
Restores proper bearing preload for extended component life

Installation Notes and Tips

Ensure the bearing surfaces are clean and free of debris before installation
Use proper tools to press the cone and cup into place without damage
Verify standout measurement of 0.6900 inches to set correct preload
Apply recommended grease compatible with taper bearings
Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty Information

National wheel bearing and race sets are manufactured to meet industry standards for durability and performance. The KD-12051-Z part number 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 product reliability.

Brand	National
Part Number	KD-12051-Z
Cone Bore (Inch)	2.6250
Cone Bore (MM)	66.6750
Cone Length (Inch)	0.9230
Cone Length (MM)	23.4440
Cone Radius (Inch)	0.1400
Cone Radius (MM)	3.5560
Cup Bore (Inch)	4.4680
Cup Bore (MM)	113.4870
Cup Length (Inch)	0.7411
Cup Length (MM)	18.8240
Cup Radius (Inch)	0.0470
Cup Radius (MM)	1.1940
Part Description	Taper Bearing Set
Standout (Inch)	0.6900
Standout (MM)	17.5260
Taper Bearing Cone	395CS
Taper Bearing Cup	394CS
Width (Inch)	1.4311
Width (mm)	36.3500

This part fits 106 vehicles. Search below:

Year	Make	Model	Position	Notes
2000	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
2000	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
2000	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
2000	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1999	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
1999	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
1999	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1999	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
1999	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1999	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1998	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
1998	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
1998	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1998	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
1998	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1998	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1997	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
1997	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
1997	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1997	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
1997	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1997	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1996	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
1996	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
1996	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1996	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
1996	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1996	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1995	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
1995	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
1995	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1995	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
1995	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1995	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1994	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
1994	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
1994	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1994	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
1994	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1994	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1993	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
1993	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
1993	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1993	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
1993	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1993	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1992	Chevrolet	C3500	Rear Inner	Fits with Spicer 80 Axle.
1992	Chevrolet	K3500	Rear Inner	Fits with Spicer 80 Axle.
1992	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1992	GMC	C3500	Rear Inner	Fits with Spicer 80 Axle.
1992	GMC	K3500	Rear Inner	Fits with Spicer 80 Axle.
1992	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1991	Chevrolet	C3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1991	Chevrolet	K3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1991	Chevrolet	P30	Rear Inner	Fits with Spicer 80 Axle.
1991	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1991	GMC	C3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1991	GMC	K3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1991	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1991	GMC	P3500	Rear Inner	Fits with Spicer 80 Axle.
1990	Chevrolet	C3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1990	Chevrolet	K3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1990	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1990	GMC	C3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1990	GMC	K3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1990	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1989	Chevrolet	C3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1989	Chevrolet	K3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1989	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1989	GMC	C3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1989	GMC	K3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1989	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1988	Chevrolet	C3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1988	Chevrolet	K3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1988	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1988	GMC	C3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1988	GMC	K3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1988	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1987	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1987	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1986	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1986	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1985	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1985	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1984	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1984	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1983	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1983	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1982	Chevrolet	P30	Rear Inner	Fits with Rockwell Standard C100 Axle.
1982	GMC	P3500	Rear Inner	Fits with Rockwell Standard C100 Axle.
1981	Chevrolet	P30	Rear Inner
1981	GMC	P3500	Rear Inner
1980	Chevrolet	P30	Rear Inner
1980	GMC	P3500	Rear Inner
1979	Chevrolet	P30	Rear Inner
1979	GMC	P3500	Rear Inner
1978	Chevrolet	P30	Rear Inner
1977	Chevrolet	P30	Rear Inner
1976	Chevrolet	P30	Rear Inner
1975	Chevrolet	P30	Rear Inner
1972	GMC	G35/G3500 Van	Rear Outer	with H110 Axle
1972	GMC	G35/G3500 Van	Rear Inner	with H110 Axle
1971	GMC	G35/G3500 Van	Rear Outer	with H110 Axle
1971	GMC	G35/G3500 Van	Rear Inner	with H110 Axle
1970	GMC	G35/G3500 Van	Rear Outer	with H110 Axle
1970	GMC	G35/G3500 Van	Rear Inner	with H110 Axle

* 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:

127629127630127631127632144527144528330100394CS455539455540455541941224694124239412426BS225210BS225212BT12051ZKDFKD12051ZK32KD12051-ZKD12051ZS612YR13

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.