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NATIONAL 370028A  
$38.89
Price
 $0.00
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 + Sold in packs of 1x1
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 $38.89
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NATIONAL 370028A Specifications
Housing Bore (IN)6.250
Housing Bore (MM)158.750
Installation ToolRD289
MaterialNitrile
Outside Diameter (IN)6.256
Outside Diameter (MM)158.900
RedicoatYes
Shaft Diameter (IN)5.000
Shaft Diameter (MM)127.000
Type01
Width (IN)1.375
Width (MM)34.930
Nitrile, Shaft Size=5", Housing Bore=6.25", Outer Diameter=6.256", Width=1.375
NationalŪ Oil Seals & Bearings has built a reputation as one of the most respected names in the industry. They have offered premium sealing and wheel end solutions for more than 75 years. Their design and engineering teams keep pace with the industry and provide advanced solutions for today's vehicles.

Features & Benefits:
  • Red 37 Series oil bath seals deliver dependable point contact seal
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Unitized construction provides greater structural integrity, easier installation and main lip protection
  • Abrasion-resistant nitrile with spring-loaded main lip for positive sealing with reduced shaft interference
  • Unique rubber I.D. and O.D. includes patented SURE-LOCKŪ ribs that prevent shaft leaks and bore contamination
Additional Resources

National Heavy Duty Wheel End Offerings
National "Red" 37 Series Seal Design
National Wheel End Seal Installation Procedures
Troubleshooting Checklist For Oil Bath Seals
Seal To Bearing Comparison Sheet
OEM / Interchange Numbers: 88AX375, 88AX378

NATIONAL Warranty Information:
12 Months